What happened
 

Only 12.6 hours on the clock. Builders is standing behind his work and going to fix it. Just looking for some of the engine builders opinions. Most of the hours are cruising 3500rpm of course a few wot passes 5400rpm MSD ignition and soft touch limiter with a 5800 plug.


http://i927.photobucket.com/albums/a...G_00000999.jpg.

Last fall different cylinder http://www.offshoreonly.com/forums/g...?highlight=598.

Looks like valve stuck open and got whacked. Thats pretty ugly stuff there .

Another valve guide clearance thread in the making?

jeepers bro .. dam youre luck ..i feel for ya .. :(((((

Ouch! Were the heads new assembled units? If so it my have had a tight guide and the valve seized. Props to your builder for standing behind his work. In the time we live in it seems we hear more horror stories than good reputable people. Hope it all works out.

looks a little lean compared to the other cylinders.to much heat will stick that valve..could also come down to water flow thru the cylinder head.2 engines down,,something in the set up is amiss.

He used the block head castings crank and rods everything else was new.

Just trying to answer questions and educate my self. So I appreciate all responses.
Water temp barely over 100 oil temp 185 to 190.
Different cylinder than the first time opposite side this time.

Yes it sucks. But I know there are others with alot worse problems than a damaged boat motor. So I'm a lucky man.

Does that exhaust port look steam cleaned or is it just the light.