Briggs Vtwin Turnsover and Bumps Back

[slomo]

I confirm what you said per Briggs parts list for your engine. Briggs 790562 IS the correct cam.

Your date code - 031229YG

 

[davbell22602]

All pictures online doesnt show a compression release on the camshaft.

 

[slomo]

My pictures came from the Briggs and Stratton store. Even put the link up for you.

It was the first hit on Google.

Both pictures show a shaft, 2 lobes, 1 gear and this funny finger like metal part with a spring.

 

[davbell22602]

This is vtwin engine not single cylinder.

 

[slomo]

I used what you wrote for your engine numbers

445777
0263-E1
031229YG

Found your cam at the briggs store. Unless they posted the wrong pic??? Could be......

Just hit me. Thanks for the correction. Your twin should have more lobes. My bad.... Wrong pics from briggs store.

 

[slomo]

This is the cam pic from your parts diagram at the briggs store. More lobes all around.... Again MY BAD. Sorry for the poor detective work.

 

[davbell22602]

So can worn cam lobes cause it to not turnover with plugs installed?

 

[bertsmobile1]

Well & good Slowie,
But that is a single cylinder cam & Dave has a V twin
AFAIK the biggest B & S single is 20Hp
Right at the start Dave posted
445777
0263-E1
031229YG

 

[bertsmobile1]

Dave,
Try closing down the gap on the inlet valves , one at a time
This means they will open latter so let less air in thus at full compression there will be less in there to compress
Some cams actually have a bit of a bump in them to decompress usually through the exhaust that at running speed the follower passes over
An idea originally used by Levis motorcycles from memory
If tightening the valve lash works then you know the cam is on the way out
I have customers mowers with a lash on the inlets are down to 0.001" because the cam / followers are wearing down & the owners does not want to pay for a replacement .

Try powering the starter by jumping from the battery + directly to the + terminal on the starter
Starter cranks the engine over means that one of the power cables or solenoid is faulty
Do the same with the - side to a good ground
Starter turns the engine over = high resistance on the ground cables

If the starter can still not turn the engine through compression, try jumping directly from your car / truck
If it turns the engine over properly then you battery is cactus

 

[slomo]

Well & good Slowie,
But that is a single cylinder cam & Dave has a V twin
AFAIK the biggest B & S single is 20Hp
Right at the start Dave posted
445777
0263-E1
031229YG

All correct.

Again I disclosed MY mistake to all on here.

Sorry the web site thebriggsstore.com got me astray with their pictures.