2HP 48cc don't know year

[v12mac]

I think it is an early 90's 2 hp one cyl. I found it in an old shed and tried to fire it up just for kicks. It looks to have just under 40psi compression and a weak spark. I got it to kick over and fire a few times but I want to know if I am even close with these comp numbers before moving on.
Any ideas?
Mac

 

[hoeser]

Re: 2HP 48cc don't know year

40psi is terrible... I'm not really up to speed with the little engines but I would assume you want at LEAST 80psi or more. Maybe a stuck ring or rust, corrosion, scoring in the cylinder. You can try tossing some oil down the plug hole and checking compression again to see if it improves.

 

[tashasdaddy]

Re: 2HP 48cc don't know year

tilt it so plugs are up, put marvel mystery oil in it for a few days. whats the model number?

 

[v12mac]

Re: 2HP 48cc don't know year

Eagh, chucked it in the dump. I added up what a ring kit and gaskets would cost, bought a 4 hp 4 stroke.

 

[JB]

Re: 2HP 48cc don't know year

My guess is that you threw away an easily repairable engine, V12.

This psi paranoia is a pain in the butt. 40psi is not good on a recently run engine that has been decarbed, but on one you found in a shed it is acceptable as a starting point from a rope start engine.

If it is a bone fide OMC engine, get it out and send it to me. I will pay the shipping.