Re: No compression 25hp what should I do
Well, I'm not an expert but if it were me I'd take the plug out and peek inside to start with. Next would be a compression test. There's a big difference between zero and low compression. <br /><br />Easy things to look for through spark plug hole:<br />Hole in the top of a piston.<br />Piston does not move when crank turns (broken connecting rod).<br />Neither piston moves when crank turns (broken crank)<br />Aluminum debris on the top of piston, or on the plug. Possible detonation damage or busted rings, bearings, etc.<br /><br />Frome there, if the cause of low compression is not obvious I would pull the side cover plate off the exhaust cooling jacket and have a peek through the exhaust ports. From there you should be able to see the cylinder wall surface, and the condition of the rings, etc. <br /><br />Only as a last resort, would I open up the crank case.<br /><br />My comment about bringing it over wasn't meant to imply that I wanted to fix it for cash. I just meant I'd look at it with you, and might be interested in it.
