Briggs no compression fix

[@kenmaughan1]

Took my mower to a repairman. He told me it had no compression, a stuck valve, and to buy a new mower. Took it home and found this video. Took it apart, found the ring the valve seats against had come loose. Tapped it back in to place and put the mower back together. Started on the first pull. Don't know how long it will last, but for now, you saved me the cost of a new lawnmower! Thank you!

[@bbbjim1fixedit]

glad to hear you got your engine fixed. if the valve seat does work itself loose again you may need to take a nail or center punch and pein over the aluminum around the seat to help it stay in place.

[@brianandrews7099]

Let me guess! The repair shop also just happened to sell new mowers?

[@ChristopherTreadway]

Great tips. Of course all the space shuttle maintenance crew will chime in on how to do it right, but for some reason they are still watching the video. I have had 2 mowers like this and done just like you did, and it worked and is still working.

[@bbbjim1fixedit]

Glad to hear you liked the video

[@frankie7508]

No frills repair with excellent explanations As well as videography. You can tell he is a professional with years of experience because there are no wasted efforts or investigations. Thanks a lot for a great repair! 👍👍👍

[@bbbjim1fixedit]

Glad you like the video

[@TheNemo65]

Thanks for the video. I never took engine off the lawnmower before. Same issue here, no compression on my Brggis engine so I took the engine cover off (after watching your video) , upper valve ring popped off from the valve rim which caused valve from going back in. Flush the ring with the valve then gently tap the valve in. Fixed it!

[@bbbjim1fixedit]

good job

[@carlclark1127]

I'm working on a push mower now with no compression. I glad I found your video. Thanks

[@bbbjim1fixedit]

Glad I could help

[@mikbru2464]

Great job getting this started. I am impressed. Keep on fixin'

[@bbbjim1fixedit]

Thanks, will do!

[@roamer4415]

Thanks... mine had no compression also, but one of the valve seats had come loose and was blocking the valve from closing.

[@bbbjim1fixedit]

i wish you the best on your repair

[@rcholews]

Thanks man. The only video on KZbin that makes this job easy. Had the exact same valve issue on B&G engine except on the intake side.

[@bbbjim1fixedit]

Glad it helped

[@dfields9511]

gr8 repair, I have a 190cc Briggs flat head when it is hot is looses compression and does not start.. I am sure it is not a coil. I suspect a issue with exhaust valve adjustment. this may be exactly what I need thanks

[@bbbjim1fixedit]

glad this helped

[@BrokenToeKnee]

Thanks for this - I got my B&G 725EX series fixed up. The intake (bottom valve) wasn't seating. I had to file off almost a full millimeter. The only trouble I ran into was that I didn't have anything to use as a spring compressor. But, I got it put back together. I started with 40psi compression. Finished with 100psi. How long this 'fix' lasts is anybody's guess.

[@bbbjim1fixedit]

Nice work, and glad to hear this video helped you out

[@EdWeibe]

got my valve honing done and just got a spring compressor. Its worth it and much less frustrating.

[@bbbjim1fixedit]

it is a handy tool to have

[@sontagkevin]

Great video! Simple and to the point instruction

[@bbbjim1fixedit]

Glad you enjoyed it

[@nestorroman2694]

Thanks for sharing excellent information Sir! Fix my valves.

[@bbbjim1fixedit]

Glad to help

[@carlodonnell146]

in spite of the new head gasket the compression did not seem to be very high 50? is that because of the compression release system that these small engines have?

[@bbbjim1fixedit]

I later found out the head was a bit warped and the head gasket was leaking. I resurfaced the head and lapped the valves. it now has almost 75psi which is still low yet on a 20 year old engine it is likely the best it will be.

[@carlodonnell146]

thanks for explaining;I guess when changing a head gasket it always good practice to resurface the head and the block too, sometimes the block is the biggest problem. Thanks again

[@bobmcl2406]

Very well explained video. This is a repair that I have not yet had to do on a small engine, but now I have a lot more information when I encounter this problem. Thanks for taking the time to post this. Cheers from Canada.

[@bbbjim1fixedit]

Glad it helped, and thank you

[@borissciaroni53]

nice video. Good explaination, also about screws (that we forget everytime where the screws have to go :) )

[@bbbjim1fixedit]

Glad you liked the video

[@RandomBradCreator]

Good Video I use Brass Wire wheels in the Drill to remove the carbon Build up , Quicker Does the Job Awesome , nowhere near as Brutal as a Standard Wire Wheel in the Drill 🍻

[@bbbjim1fixedit]

Great tip, I was just using what I had

[@Steve0885]

So that more started with only 40 psi of compression?

[@bbbjim1fixedit]

Yes, but it was low on power and by the end of the season it blew the head gasket again. The head was a bit warped so I did some resurfacing on it and lapped the valves, that increased the compression to around 70 psi

[@johncarter7284]

Seems to run ok, will cut grass. Shouldn't the valves be lapped in with valve grinding paste?

[@bbbjim1fixedit]

Indeed lapping will improve compression, most people don't have the stuff to do that, and I wanted to keep the video from being too long.

[@tgriebe]

1) You need to use valve grinding compound, not wet and dry sandpaper on valves and 2) you need to use a feeler gauge to set the valve clearance. And don't grind a flat valve stem on a circular wheel, worst case use the side of the wheel

[@bbbjim1fixedit]

My head was warped, and I blow the head gasket a year later. I also lapped the valves with compound. Thanks to the good tips

[@ChristopherTreadway]

It’s a lawn mower, not the space shuttle.

[@larrytyler8601]

You got good mechanic fingers

[@bbbjim1fixedit]

thanks

[@ronniebarker79]

The drill trick does that have to be in forward or reserve saw it done but never heard what setting it was on

[@bbbjim1fixedit]

forward, yet have a firm grip on it if you attempt that

[@Nick23at63]

Nice video. I have a similar B&S engine on a Craftsman push mower which is burning oil and smokes out of the muffler. I have already put a new head gasket on and cleaned the valves, though I did not grind the exhaust valve. Compression test showed 60 PSI, but smoke is still coming from the muffler and it is still burning oil. Others have told me the problem is the piston rings most likely, but wouldn't my compression test be lower if the rings were bad? I'm also getting some oil in the air filter. Do you think grinding that exhaust valve might help? Is there something else I'm not thinking of. Sears Parts direct guy said compression test should be between 40 to 60 PSI, so I'm sorta confused. Thanks if you can help.

[@bbbjim1fixedit]

If you have 60 psi of compression it is unlikely the rings. I made another video of smoking engine fix, and you will likely need to pull the exhaust valve if not seating tightly. I wish you the best on your repair. Link to video: kzbin.info/www/bejne/aGrJknh4fr6sjdk

[@waynerowlinson6177]

Super late response, but if someone else reads this. Something simple to look at is to make sure you only fill your oil to the full mark on the dipstick. I have seen people fill the oil until it is almost coming out the tube. It will definitely smoke then 🙂

[@richardcole6566]

nice job!! Question, what was the value lasting number? Also, how much torque was applied to the head bolts? Thanks

[@bbbjim1fixedit]

every engine has slightly different valve lash spes. Typically ,005 to ,007 on intake and .007 to .009 on the exhaust. On the head bolts I just tightened them in a crossing pattern until tight, I am not sure if the L head engine has a torque spec. I wish you the best on your repair.

[@andyhamilton8940]

I would say all the gunk on the motor is causing overheating on that motor. Nice job!👍

[@bbbjim1fixedit]

This motor was in rough shape, and I am glad you liked the video

[@EdWeibe]

you started that with only 50 pounds of compression?

[@bbbjim1fixedit]

Yes it ran the rest of the year like this and then blew the head gasket again. The head was warped and I made a couple more videos lapping the valves and resurfacing the head, if I remember correctly it has about 70 psi after doing all that

[@tommcguire6134]

I have a similar engine with 63 PSI on compression test. Will hold for at lease 5 miniutes. Is that enough compression to get it to start? Will not start - has spark and I used starting fluid - nothing. I notice it looked like you replaced the coil also. Did you not have spark or was it weak or something. Thanks for any advice.

[@bbbjim1fixedit]

this engine was in bad shape, lapped the valves and I did have the head gasket leak again, had to flatten the head along with the coil no spark. 63 psi is low yet it should start, will be low on power. you may wish to look at the flywheel key, if sheared your spark will be off. I wish you the best on your repair

[@tommcguire6134]

Thanks appreciate your help! @@bbbjim1fixedit

[@luisegallegos8120]

Super chingon trabajo compita felicidades y mil gracias por la ayuda con el vídeo bendiciones y keep doing more videos,ayuda demasiado saludos desde La Luz Michoacán México

[@bbbjim1fixedit]

Me alegra saber que este video fue útil

[@sonnyc3826]

i think this is probably the problem with mine..it has spark, gas, seems to be water getting intot eh carb for some reason but i emptied the gas tnak washed it and put new fuel in and appears to be same problem..why ? idk...but i didnt know i can take these valves out..i cleaned in there but the vavles ar epretty dirty with carbon ill give it another shot tomorrow i guess.

[@bbbjim1fixedit]

I wish you the best on your repair

[@sonnyc3826]

@@bbbjim1fixedit ty

[@aaronjohn6586]

Thanks for the info but gotta say getting the springs and keepers back in was a freaking challenge.

[@bbbjim1fixedit]

they tend to be a struggle, glad you found the video helpful

[@aaronjohn6586]

​@@bbbjim1fixedit Thanks to your video just spent about $30 for new head gasket and torque wrench instead of paying a lot for a new machine or repair.

[@davidholland6061]

How did it start with 30 lps of compression? Was your gauge off?

[@bbbjim1fixedit]

It did start yet it was low on power and I later found the head was warped and the head gasket not sealing the best. after those repairs it was about 80 psi

[@matthewcriss29]

What was your final compression reading?

[@bbbjim1fixedit]

If I remember correctly it was 65psi. That is still low, yet it was enough to get it running. I wish you the best on your repair

[@jesusdrummer21]

So. Is this adjusting the valves...so much different then the OHV?

[@bbbjim1fixedit]

an over head valve has an adjuster built in the rocker, this is an older flat head (Lhead) engine and as it wears this is the way to adjust the valve lash.

[@johnlattarulo2578]

My mower is the Lhead type like this engine. It has a hard pull. Will this guide fix that?

[@TheUltimate65]

A clean engine innside like outside, have a better life of problems .. Chech the valvecleranse at enyway , its the innletvalve cleranse its have almost too tighten

[@bbbjim1fixedit]

this mower took a lot of work to get back in running condition. glad you liked the video

[@philliphall5198]

Usually just head gasket 😊

[@bbbjim1fixedit]

On this one the head was a bit warped and I had to replace the head ad gasket again a year later, looking back I should have checked that as well

[@m.angeloz9080]

Gottdam that looks worse than what I picked up so far but wow I admire the work dude

[@bbbjim1fixedit]

glad you liked it

[@jciamretired9767]

Very good video, informative. Thank you

[@bbbjim1fixedit]

Glad you enjoyed it

[@WingedHawkKAppaloosa]

excellent. thank you for sharing this ;)

[@bbbjim1fixedit]

glad to help

[@spiderstone]

Nice job.....easy to watch.....

[@bbbjim1fixedit]

Glad you liked it

[@kenfield7]

I have the same problem, now I have a fix

[@bbbjim1fixedit]

I wish you the best on your repair

[@chrischeatwood9468]

Good video

[@bbbjim1fixedit]

Glad you enjoyed

[@ededmund5685]

you didn't grind the valve enough , you need 80 to 100 pounds to work as it should ,,

[@bbbjim1fixedit]

This engine was worn, and I noticed after running this mower the head was warped as well. You are right the PSI should be higher