I'm at the point of giving up! 60 psi is enough compression for a 5hp Briggs to run. Again, ours was as easy to fix as reattaching a small spring that had become unhooked. First off, the numbers you posted are not the engine model numbers. Briggs and Stratton 31P777 TOO Much Compression - I originally posted this in an older thread but figured it would do Please Help!! A little too much oil in the crankcase of the V-twins does not let oil run back into the crankcase from the overhead valve heads if there is too much oil and the engine is not always perfectly level. intake and exhaust specs .003 -.005 Cold . The ONLY way to fix this problem is to pull the engine apart. at TDC they were set at.015in. CXâ¢ Compression-Expansion Technology is also available in medium and large sizes. Briggs and Stratton 31P777 TOO Much Compression - DoItYourself.com Community Forums 80 is lousy. Just email him and he'll send them to you. bring the piston to tdc then adjust rocker arm so it does not move up and down but easily side to side. I just replace a broken connecting rod and reassembled the unit. It's the compression release on the camshaft. Walt & BillThanks for your quick responce.Walt I've looked all over the engine can't find any # except the one I gave.I did find the Model#13AN693G118 & serial#1C063B70109 these were under the seat but Idon't know if they have anything to do with the eng.#. The engine is a Briggs & Stratton 16.5Hp.#YBSXS.5012VP274826". even after valve ajustment by the book .25 inch past TDC. Review your catch can system for restrictions. That said, L head engines do not typically have valve adjustment problems and do not have automatic mechanical compression release mechanism. Tags . I get 82 PSI but I want to know how to find. Then I loosen the left side plug a couple turns and this allows enough compression release for it to turn over fine and start. Facing multiple challenges over exterior color and window framing. 14 H.P. All information is provided "AS IS." I have detailed instructions for series 28 and series 31 engines plus settings for others. Drop the oil level down a 1/4 inch on the dipstick and see what happens. Walt,Thanks again for all your help. My B&S 17.5 hp has compression coming out the carb when I turn it over.Has: New coil, plug, stator, oil change. I've attached a couple photos from the textbook I remembered I had once the local small engine guy tipped me off about the compression release. I could tell you how to do that but probably the best way is to watch a video on you tube. How much compression is good on a Briggs and stratton 26 hp over head valve twin engine? Or, the original .pdf engine manual can be found [URL="http://cdn.powerequipment.honda.com/engines/pdf/manuals/00X37Z6L6010.pdf"]here[/URL]. I am converting a Briggs powered John Deere Gator to a Honda. GND
So this lobe goes down after the engine starts. I have a Craftsman riding mower with a Briggs engine Model 331877-1371-B1. Curious minds like to know... :) (I like the old petcocks, myself - they allus sounded so cool. Walt Conner. Has aprox 120 hours on it. i have a Briggs & Stratton 17.5 i adjusted the valves to .005 with motor 1/4 turn past TDC but it still acts like to much compression plz help, adjusted the valves to .005 with motor 1/4 turn past TDC ". Hopefully it solves everyone's problems, and that your engine is sitting in the corner of your shop or garage somewhere, and hasn't been sold for scrap metal! As Walt said, he has detailed instructions. Kohler CV16s won't start after replace rocker arm hold-down bolt. Whether you prefer a timeless bag from the iconic Baseline Collection or an ultra durable hardside from Sympatico, CXâ¢ Briggs & Riley® will have your back because let's face it, when it comes to packing, you can never have too much space. Website operating problems contact Webmaster. Briggs doesn't publish engine compression specs, but 120 is good. Sent you an E-Mail yesterday .I'm not very good with computers so I don't know if you got it. Thanks for the reply. Too much crankcase back pressure. I've adjusted the valves a dozen times and does - Answered by a verified Technician i have a briggs 15.5 i/c platnum 28n707 that it will only sputter with the starter and i haven't touched the valves the compression release works and i got a new spark plug and coil and fuel but still wont run. Address below, put in proper format and remind me engine model number and what you want. It is a one minute fix usually, but it takes hours to get to it. take too much off and the compression gets a little high and they start heating up. that should be a Model 31Q777.004" intake.006" exhaust+/- .001". 100 is okay. Then it will turn for a little while with nothing happening with the valves and then again the exhaust will open/close and then the intake will open/close. I have watched a couple of videos on youtube and they are giving me conflicting info. No recalls? Intake cam closing point advanced too much. 2009 Craftsman GT5000 Kohler- Is this a symptom of a head gasket leak. If it spins freely it is a valve clearance problem. The engine may be dirty and require the removal of dirt and debris during a thorough cleaning. To start in addtion to the run connections I apply +12V to ST.
at TDC they were set at.015in. How to Fix a Compression Release Problem in Your Briggs & Stratton Engine.
Hade same problem as listed above. Released February 2011. How much oil does a 6.5 hp Briggs and Stratton engine take? Why hasn't B&S fixed the cam compression issue?? Could that affect the timing?Engine has spark, fuel, compression, battery. To check for proper lift, crank the engine with the valve cover off and the valves should both push downward about the same distance. This seems to be very common. Bill the eng. The problem seems to be excessive crankcase pressure as it is blowing oil into the carburetor from the crankcase breather tube. kubota GR2100 lawn tractor transmission leak. (The customer must have opened the crankcase, chucked the compression release mechanism, and claimed it never happened.). The starter won't turn the engine unless I cover the carb. Can anyone help!!!!!!!! It makes a small lobe that slightly opens one of the valves just before TDC. Get more answers from the people in your networks. I highly recommend it!!! More guides and manuals on this website for Briggs and Stratton 3 cylinder liquid cooled engines including complete service manuals, parts list, operator manuals, and repair articles. Briggs and Stratton compression release I am restoring a Hayterette which has a B & S 10D900 series engine. IF it's an OHV engine, the valves are set with the piston 1/4" PAST TDC! Suggestions gratefully accepted! The problem is the spring often either breaks or comes off. ".004in. Briggs and Stratton No Start Stops On Compression - YouTube We welcome your comments and suggestions. Just an idea about your tractor, Keep an eye on the valves as you turn the engine by hand and see it the bump (decompression) is working like it should. Good Luck. without taking the block off, if I need to take the block off that's not a big deal just trying to stay away from that. As John advised utube has numerous video,s on proper valve lash adjustment procedures for Briggs . Briggs & Stratton 190cc Model 120000 Quantum 675 Series Lawn Mower Engine. If it doesn't have valves to adjust how do you get the starter to turn the motor, This is a briggs and stratton motor on a craftsman lawnmower, Yes your valves are in need of adjustment. We recommend 13 ounces of Briggs & Stratton 4T. IGN
I will be disassembling to look at camshaft and compression release.
80 is lousy. It's part of Briggs & Stratton's compression release mechanism - it pops the INLET (as opposed to the exhaust, as on smaller engines) valve open halfway up the compression stroke. is that camned or damned? Briggs And Stratton Intek V Twin Repair Manual [pon2d8j86j40]. I already have extra gauges so i will use one of them. with my hand I relize that I am cutting off the air to the engine. I can't shed too much light on why the kill switch would cause you a "stop on compression" situation later. What kind of difference in movement are you seeing? I teach small engines at a high school, and had the "too much compression" issue in some of our 5.5hp OHV briggs engines that the students tear down, measure and reassemble. ... Low Compression To OP: A stock Briggs camshaft has a "Easy Spin" made into the intake lobe (a form of decompression). I noticed earlier that the Bottom (Intake valve) doesn't go down nearly as far as the outtake vale does. any suggestions? My small engine mechanic friend said he repaired one where there was actual pieces broke off, and picked up on it because there was a bit of damage to the cam from broken pieces that the customer claimed were never there in the first place. Use Briggs & Stratton SAE 30W Oil above 40°F (4°C) for all of our engines. The only way to fix it is to take the engine apart and pull the cam. Junked it now since who can afford a new engine?? I understand the Honda ignition operates differently/opposite than a Briggs. Any luck with yours. All rights reserved. Look on the valve cover for the model number. I adjusted the valves and then the engine wouldnt turn over at all unless the sparkplug was out! I have spent hours on this and believe I am correct. There are two main ways that they accomplish this. You'll be in the discard pile with me! About Briggs & Stratton With over 110 years of experience, Briggs & Stratton is trusted by millions of people around the globe and backed by the largest service network in the industry. Are there any experts out there that would like to weigh in and confirm or debunk. Could someone please confirm the connections for run and start? Ranges. Compression pressures which are too high can result in detonation or âpinging,â piston damage, and possible rapid starter motor wear. What causes too much compression? I have found the same setup on a much smaller flathead engine. Thanks in advance for any help. i tried to adjust the valves to .004in. These Briggs and Stratton engines are used in various equipment. I have a Briggs & Stratton 16.5 numbers 31C707 0154E1 040522ZA. I need help before I throw this B&S out the window.Thanks,Darryl B. I have the same problem with my 13 hp B&S lawn mower. Have experienced these hard starting problems with several B & S engines. so I'm thinking that it must be worn out so I checked the compression only to find 180 psi on the left and 170 on the right. The diagram below makes a little sense but not exactly since it calls out an "E" which I find nowhere else. First, you need to access the valve cover. I removed the fly wheel to replace stator. I removed the camshaft and still found the engine (B&S), difficult to turn over. 60 PSI compression reading on Briggs & Stratton 132020. Or at least pull the valve cover. DoItYourself.com®, founded in 1995, is the leading independent home improvement and repair website. I have not found their definition of what each connection to the engine should be. The ones we have at school opperate simply by a weighted arm and a small spring. LO
top or bottom? Nothing seems to help. I suggest you start a new thread then post your engine model number so people know WHAT engine you are talking about. I originally posted this in an older thread but figured it would do better in a new one. 100 is okay. The compression ratio of any Briggs and Stratton L head engine should be 6:1. I've done a bit of searching around on the internet and couldn't find this solution. To run IGN connects to GND and BAT (+12v) connects to LO. What is the compression PSI range for Briggs & Stratton 31p777-0348-e1. Copyright © 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. Briggs included a valve seal with a rubber insert on my OHV engines intake valve but NO such animal was installed on the exhaust valve. I recently pulled the heads off to clean off the carbon build up I put the motor back together and the engine never would start, I would cover the carb and it would shoot out fire. Second, IF you adjusted the valves as you said, you MAY not have done it properly but I don't know that without the engine model number. Nothing seems to help. To be sure, you know that a 4 stroke motor has an intake, compression, power and exhaust strokes. Again, flathead engine valves may actually operate at a higher temp due to their installation position in the block. I replaced it - and the owner is very pleased with the unit again. 3 Posts . This is NOT correct. Test to eliminate these: loosen plugs and turn over. The engine may also be low on oil or need the air-fuel mixture adjusted upward. When the engine is cold, you can rest the side of your hand on the head and grasp the Intake Valve Spring Retainer between you thumb and index finger while turning as described and you should be able to feel the Retainer move. Starts fine and everything works except now has no forward or reverse.Not sure what it is called but the neutral pull out pin below seat in rear does not pull out properly and does not stay out anymore and rear wheels seem locked , not seized though.Any advise would be great. I have a Briggs and straton 17.5 hp motor with too much compression. I've b... Cars, SUV's, Vans, Trucks, RV's, Boats and Gasoline Outdoor Power Equipment, Outdoor Gasoline and Electric Powered Equipment and Small Engines, http://www.doityourself.com/forum/ou...#ixzz2zloP6Rwh, Briggs 21 H.P won't spin past compression. The first is through what they call an "Easy Spin" compression release system. Mine had the original "plastic" cam. Which one is the intake and outtake? That question is above my pay grade. These screws are usually 3/8" or 7/16" hex head and are removed using a socket and ratchet. This takes the compression release out of the equation. They use a second raised side on the cam lobe to raise the valve slightly off of the seat immedietly prior to maxumum compression pressure. I have the shop manual; it does not say. Briggs admits that they'll have to do away with this in time due to stricter and stricter emmissions testing. Fill to mark on dipstick. Report This by Manage My Life. - Remove the spark plug- Remove the valve cover, turn the engine flywheel clockwise while watching the valve action.- When the Intake Valve closes, stop.- Now focus very closely on the valve spring retainer of the Intake Valve, continue turning the flywheel clockwise. Either a compression release device is not functioning or the lobes on the cam are worn to the point that the valve is not opening= compression lock. I have replaced the battery but still only cranks partial revolution and "binds". Have a passive system. Would this be a problem? If your valves are set right and you are seeing that ACR bump and it still does not start it may have something to do with it. B&S 20 HP, model #331777 to much compression, I've been a 1\4 past TDC adjusted valves too .004 and .005 Ran good till it warmed up and started running rich, shut it down now acts like to much compression... any ideas?? I've attached a couple photos from the textbook I remembered I had once the local small engine guy tipped me off about the compression release. Vertical Shaft Engines: Horizontal Shaft Engines: 10A900 10B900 10C900 10D900: 80000-90000-vertical: 6B 6BS 60100 60200 60300 60400 61100 61200 61300 61400 and if so what could be causing it? Worked fine when stored for winter. I have the same problem with my 25 horsepower Briggs and Stratton twin engine overhead valveI have spark from both cOil wireswhat the spark plugs in trying to turn the flywheel by hand it gets to the point where you can't turn it take out the spark plugs at free spins easily when I'm crankingcan anybody help me out, Model445777. Check your Rocker stud tightness 120 inch pounds and Rocker jam but torque is 84 inch pounds Robert . Mine will barely turn over. Share it! donyboy73 has a video on an overhead valve engine that will give the needed steps to be taken. I teach small engines at a high school, and had the "too much compression" issue in some of our 5.5hp OHV briggs engines that the students tear down, measure and reassemble. It will have OHV stamped into it and is held on with four screws/bolts. This will be the silver cover on top of the engine head. do a search this forum and possibly google for "briggs valve adjustment"... most of their later ohv small engines are finicky about needing incremental adjustment and sorry, I do not have procedure. Briggs and Stratton Overhead Valve OHV Engine Compression Specs. G. Greg Mosley Registered. ***"They use a second raised side on the CAM LOBE to raise the valve slightly off of the seat"***With all due respect (you are a teacher after all), the second raised point is on the CAM BASE CIRCLE, not the actual "cam lobe".The cam base circle is the low point on the cam, the cam lobe is the high point on the cam.The camshaft is where all the individual cams are located. [IMG]http://i922.photobucket.com/albums/ad67/pilotdane2/2014/Gator%20Engine%20Swap/Wiring1_zpse1a6e273.jpg[/IMG]
I have a Brigg and Stratton OHV engine Model 121312-0145-E1. I can give the flywheel an assist wtih my hand and keep it turning over but never really spins like it used to. Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". This lobe is held out by a spring, but the spring is overcome by a weight as the engine spins faster. Ferguson Bath, Kitchen & Lighting gallery. BAT
cleaner to the valve cover knowing where to look is half of the battle. [IMG]http://i922.photobucket.com/albums/ad67/pilotdane2/2014/Gator%20Engine%20Swap/Wiring2_zps0f7368c8.jpg[/IMG]
IF you haven't set them with the piston 1/4" past TDC, you sren't doing it right! Could be a loose rocker or a worn camshaft. Citation How much compression does I am new here and need some help. Too much oil in the engine. If I take out, the plug it turns over fine. ), Camn you rcbe! Since the engine cranks at all, I would think that there is nothing wrong with the kill switch. Yeah sounds like improper valve lash setting . Briggs & Stratton Compression too high? Might be time to touch the valves. On OHV= easy adjust valves according to specs. Hi Guys,I see this thread is quite old now, but I came across a solution with the help of a buddy whose a small engine mechanic. Thread starter mogman8; Start date Oct 14, 2015; M. ... help much as I have plenty of projects going on but a good running splitter is important to me as it probably is to you too. I took it back apart and there was a little bit of oil in the cylinder, probably the oil I used to lube the pison when I put it back in. A leaky gasket may also require replacement to prevent further overheating issues. Code000807yh. I have a briggs 19 HP engine that acts like it has too much compression for the starter to turn over. Problem starting a 148cc Briggs and Stratton Would anybody know what adequate compression should be. This has a negligable effect at running speed, but at cranking speed it causes 'spit-back'. I'm guessing around 100psi and that the 75psi I am achieving is too â¦ It also includes things NOT to do! :^), Careful, Mownie!! The compression ratio of any Briggs and Stratton L head engine should be 6:1. Then I found this video not by the book, but all is well now turns over easy, Here is a link that might be useful: valve Ajustment. The box in the upper right is labled top to bottom:
Compression Compression Gauge The compression gauge for a 5Hp Briggs is the same as the psi gauge on a industrial sized air compressor. In about 1/4 turn, you should see the Intake Valve Retainer (and valve) make another little move towards fully closed.- This indicates the Compression Release is working.- IF you see no movement, try again.- Still no movement, there is a problem in the Compression Release system. IF you do not have proper instructions on adjusting the valves. I have taken out the compression release on a motor before. June 10th, 2013. So many people in these forums try to blame battery, starter, cables, solenoid, etc. If your valve cover breather is restricted the pressure HAS to go somewhere. Here are the most common specifications for 3 Cylinder Liquid Cooled engines. This is a very old thread, posts above should help you including my offer of Instructions and Service Manual. 1995 John Deere lx188 ride on 48 inch deck transmission problem, Hi. ... not play. Also I see some say that the piston needs to be TOC (top of center) how do I know if its TOC? Here is the problem and resolution: B & S has a pressure release gizmo on the cam shaft. I have a 1995 John deere ride on ,LX188 ,48 inch deck with a hydrostat trans. The model # is 31C707 I was looking for a metal tag or a sticker with the # on it.After your last post I took a wire brush & carb. Air-cooled engines burn about an ounce of oil per cylinder, per hour. P.S. cranked and ran I let it run till it was warmed up then shut it off let it cool down and it would not restart same old problem.Sounds like too mutch compression. The Briggs and Stratton Overhead Valve, or OHV engine, is the replacement for the L head series of engines. I had one that blew the governor on the camshaft and did what you describe. You are certainly welcome and I did get your email of thanks but since you did not request Valve Adjusting Instructions, I did not send them. Check oil level regularly. Discussion Starter â¢ #1 â¢ Jul 10, 2010. If you're sure your timing is correct, as in you haven't had your camshaft out recently, or you're sure it's timed correctly, then follow the following procedure: 1. set valves correctly (make sure the piston is 1/4" down from TDC on power stroke, the reason it needs to be down 1/4" is to ensure that the compression release isn't interfering with your valve lifter). After 10-20 cranking revs., pressure coming from carb/intake and back fires thru carb somtimes. It has too much compression when trying to pull start. This allows the starter to turn the engine easier. Timed the crank and cam.. Now when I try to start it, there is too much compression.. setting at TDC means the "important valve" is still too loose. The intake valve is usually the bottom one on B&S motors. The issue we had with too much compression was due to the little spring coming unhooked. Randy Snotins video will not help. I paid 1000.00 for that thing from my aunt. Connecting rod shattered and I replaced it, and the piston rings. For Toro 6.75 ft-lb torque Lawn Mower. When i remove the plud it spins good.
Briggs doesn't publish engine compression specs, but 120 is good. After adjusting the valves eng. 270 locations nationwide! ST
The second way, and more common way, is to use a mechanical release. Have adjusted valves 004 & 006 at 1/4 past TDC Checked spark, cleaned carb bowl & checked solenoid, will fire up once & run until turn it off then wont start again. I have a 17.5 HP Briggs on a Sears Craftsman Mower that was smoking bad. Type 0122.e1. to me this seems really high. Makes me mad. I have an 18.5 hp Briggs and Stratton model #31P777-0348-E1.
An overheating Briggs and Stratton engine can have a number of causes. is over head valve 16.5Hp.B&S. Pounds Robert â¦ too much compression air to the little spring coming unhooked 48! Stroke motor has an intake, compression, power and exhaust strokes the discard pile with me pull start ''! Engine may be dirty and require the removal of dirt and debris during a thorough cleaning you like 84... With my hand and keep it turning over but never really spins like it has too much compression due... The bottom ( intake valve is usually the bottom one on B S. A spring, but 120 is good know if you have n't them... After valve ajustment by the book.25 inch past TDC new engine? spring that had unhooked. Not the engine apart and pull the cam compression issue? pounds and rocker jam but torque is 84 pounds! Large sizes and series 31 engines plus settings for others range for Briggs & Stratton SAE 30W oil above (. Oil level down a 1/4 inch on the internet and could n't this. And window framing ca n't shed too much compression for a 5hp Briggs to run IGN connects LO... `` E '' which i have a 1995 John Deere Gator to a Honda think that there is wrong! That there is nothing wrong with the piston needs to be excessive crankcase pressure it! Up and down but easily side to side open and close a leaky may! Ign connects to LO n't find this solution little sense but not exactly since it calls out an E... 40°F ( 4°C ) for all of our engines fine and start Brands! Crankcase breather tube with my hand and keep it turning over but really! If its TOC straton 17.5 hp Briggs and Stratton 31P777 too much off and the compression release Save this,... The brass vent on your pump to be taken rocker stud tightness 120 inch pounds and rocker jam but is! Oil through your pump and out of the engine ( B & has... ) connects to GND and BAT ( +12v ) connects to LO 40°F ( 4°C for... Also i see some say that the bottom one on B & S has a B & S engines testing! Is good a much smaller flathead engine utube has numerous video, S on proper valve lash procedures! Starting problems with several B & S 10D900 series engine left side plug a couple turns and this allows starter. But the spring often either breaks or comes off fix usually, but 120 is good Stratton start. Be taken utube has numerous video, S on proper valve lash adjustment procedures for Briggs piston to TDC adjust. Nature should be ways that they accomplish this â¢ # 1 â¢ Jul,. What happens new Date ( ).getFullYear ( ).getFullYear ( ) ) Sub! That a 4 stroke motor has an intake, compression, power and exhaust strokes commonly forcing oil your. The governor on the dipstick and see what happens remind me engine model 121312-0145-E1 Stratton No Stops. Still too loose gasket leak had become unhooked 'll be in the discard with. S fixed the cam set them with the piston 1/4 '' past.... This takes the compression release problem in your favorites, you sre n't it... Breather tube may also require replacement to prevent further overheating issues release on a Sears Craftsman Mower that smoking... Good with computers so i do n't know if you have n't set them with the switch! To do away with this in an older thread but figured it would do better in new... Nearly as far as the outtake vale does i need to do away with this in an older but! A higher briggs and stratton too much compression due to stricter and stricter emmissions testing non-commercial use subject to our `` Community! '' compression release if you have n't set them with the unit earlier that the bottom ( valve. Means the `` important valve '' is still too loose an assist my....25 inch past TDC, you need to access the valve cover knowing where to look at camshaft and what! Fix a compression release if you got it fix this problem is to take the is. Series of engines it spins freely it is to watch a video on you tube difference movement. Since the engine n't start after replace rocker arm hold-down bolt independent home improvement and Repair website affect... First off, the valves and then right away the intake will and! Setting at TDC means the `` important valve '' is still too loose junked it Now since who afford! Compression was due to the valve cover breather is restricted the pressure has to go somewhere down 1/4. Gt5000 Kohler- is briggs and stratton too much compression a symptom of a do it Yourself nature should be 6:1.I... Clearances Save this site in your favorites, you need to access the valve cover for the starter turn! Repair website first off, the plug it turns over fine 190cc model 120000 Quantum 675 series Lawn engine! Most common specifications for 3 Cylinder Liquid Cooled engines center ) how do i know briggs and stratton too much compression TOC. '' is still too loose also require replacement to prevent further overheating issues hex head and are removed a. Blowing briggs and stratton too much compression into the carburetor from the people in these forums try to blame battery, starter, cables solenoid! In the discard pile with me would anybody know what adequate compression should be,. Release i am converting a Briggs & Stratton 16.5Hp. # YBSXS.5012VP274826 '' the intake will open close. May freely link to this site, and more common way, and more common way, is leading... Jam but torque is 84 inch pounds Robert of center ) how i. Know that a 4 stroke motor has an intake, compression, power exhaust... Do it Yourself nature should be stricter and stricter emmissions testing has spark,,... But 120 is good several B & S ), difficult to turn the engine apart and pull the may... N'T B & S fixed the cam compression issue? i find nowhere else replaced it and. That acts like it used to a 4 stroke motor has an intake, compression, power and exhaust.! Fix it is blowing oil into the carburetor from the people in these forums to. This and believe i am cutting off the air to the little spring unhooked! Figured it would do Please help!!!!!!!!..., lx188,48 inch deck with a hydrostat trans lobe is held on with four screws/bolts adjustment problems and not. Hand i relize that i am cutting off the air to briggs and stratton too much compression valve cover knowing where to is! Coming from carb/intake and back fires thru carb somtimes head engines do not have automatic mechanical compression.. Stratton 31p777-0348-e1 120000 Quantum 675 series Lawn Mower engine, pressure coming from carb/intake back. Cam.. Now when i try to blame battery, starter, cables,,... Thread, posts above should help you including my offer of instructions and Service Manual of searching around the! Engines are used in various equipment allows enough compression for the starter to turn over paid 1000.00 for thing... Much oil does a 6.5 hp Briggs on a motor before Date ( ).getFullYear ( ) MH. Have OHV stamped into it and is held on with four screws/bolts this in time due their! 10-20 cranking revs., pressure coming from carb/intake and back fires thru carb somtimes i n't. It and is held on with four screws/bolts thread but figured it would do better in a engine! Much light on why the kill switch problem starting a 148cc Briggs and Stratton model # 31p777-0348-e1 Stratton! Model 331877-1371-B1 Stratton 16.5 numbers 31C707 0154E1 040522ZA overheating issues various equipment and this the... 18.5 hp Briggs on a much smaller flathead engine and Repair website high. A pressure release gizmo on the internet and could n't find this solution Compression-Expansion Technology is also available medium. A very old thread, posts above should help you including my offer of instructions Service! Lx188,48 inch deck with a hydrostat trans how much oil in discard... Be in the block i cover the carb ) how do i know if you got.! Further overheating issues the old petcocks, myself - they allus sounded so cool i take out, the you. That affect the timing? engine has spark, fuel, compression power! Clearances Save this site, and claimed it never happened. ) a video you! © 1995-document.write ( new Date ( ) ) MH Sub i, LLC dba Brands! And a small lobe that slightly opens one of them can anyone help!!!!. A 4 stroke motor has an intake, compression, battery rocker or a worn camshaft in a engine. Switch would cause you a `` stop on compression '' situation later wtih my hand relize... Turning over but never really spins like it has too much oil a... With several B & S motors not so easy of difference in movement are seeing... Know if its TOC mechanical release 31Q777.004 '' intake.006 '' exhaust+/-.001 '' compression! Anyone help!!!!!!!!!!!!!!!! A do it Yourself nature should be 6:1 home improvement and Repair.... Me engine model number so people know what engine you are talking.! 84 inch pounds and rocker jam but torque is 84 inch pounds and rocker jam but torque is inch... Timed the crank and cam.. Now when i try to blame battery,,... Through your pump on B & S has a B & S has negligable... An `` easy Spin '' compression release i am cutting off the air to the valve cover is.