SmallTimeMowerGuy
Member
- Joined
- Nov 30, 2020
- Threads
- 2
- Messages
- 22
I'm stumped....but then this is literally the first engine I've gone into this much depth on.
Background:
Briggs 286707-0441-01 12.5 HP I/C Quiet engine that slept in a flood for a year. I grabbed it, drained the oil and fluids etc....replaced the carb with a chineasium one and it fired up and ran but SMOOOOOOKED like crazy. I also rewired it and new starter solenoid etc....but that's not really an issue with this part.
SOOOOOO
I decided on a learning experiment(I was only into it $200 at this point)
Decided to do rings and in order to do this.....CRACK open the case.
SO....I did. Drained oil, separated the crank case, etc. It was dirty mess in there but cleaning it all out of all the crude made me feel GREAT.
I slipped the piston out, honed the cylinder until 95% of the marks were not noticeable by finger touch. installed the NEW rings on the piston ensuring the ring gaps were 1/3 piston away from each other.
I should say that I removed the governor assembly and the camshaft which had the bottom valves fall out and I didn't catch which was which.....so assembled in revers and matched the little "o" of the Crank and the Camshaft to align timing.
Now after it's ALLLLLL back together I stick it back on the tractor assemble everything and go to fire it....1/4 crank and then stops.....WAAAAAAY to much compression. remove the spark plug, cranks over and over without problem.....spark plug back in....no crank.
I do my research....find out there is a "compression relief" on some Briggs engines.....I POUR over every parts diagram and manual I can find without fining anything associate with a relief on this engine, no little mechanism on the Camshaft at all.
So.....I didn't check the Valve clearance or lash etc as I didn't remove the head from the block.
What am I missing, and this will be the third time I've pulled this engine apart...lol Any help is appreciated as this is an old engine from a Husqvarna LTH-125 tractor.
THANKS!!!
Background:
Briggs 286707-0441-01 12.5 HP I/C Quiet engine that slept in a flood for a year. I grabbed it, drained the oil and fluids etc....replaced the carb with a chineasium one and it fired up and ran but SMOOOOOOKED like crazy. I also rewired it and new starter solenoid etc....but that's not really an issue with this part.
SOOOOOO
I decided on a learning experiment(I was only into it $200 at this point)
Decided to do rings and in order to do this.....CRACK open the case.
SO....I did. Drained oil, separated the crank case, etc. It was dirty mess in there but cleaning it all out of all the crude made me feel GREAT.
I slipped the piston out, honed the cylinder until 95% of the marks were not noticeable by finger touch. installed the NEW rings on the piston ensuring the ring gaps were 1/3 piston away from each other.
I should say that I removed the governor assembly and the camshaft which had the bottom valves fall out and I didn't catch which was which.....so assembled in revers and matched the little "o" of the Crank and the Camshaft to align timing.
Now after it's ALLLLLL back together I stick it back on the tractor assemble everything and go to fire it....1/4 crank and then stops.....WAAAAAAY to much compression. remove the spark plug, cranks over and over without problem.....spark plug back in....no crank.
I do my research....find out there is a "compression relief" on some Briggs engines.....I POUR over every parts diagram and manual I can find without fining anything associate with a relief on this engine, no little mechanism on the Camshaft at all.
So.....I didn't check the Valve clearance or lash etc as I didn't remove the head from the block.
What am I missing, and this will be the third time I've pulled this engine apart...lol Any help is appreciated as this is an old engine from a Husqvarna LTH-125 tractor.
THANKS!!!