Burned Valve

[Boballoui]

My boat started running really rough last year, it has just over 200hrs on it. I took it to my mechanic and he said that it has a burned valve on the left side. Toyota says that's a 19hr job plus parts. Has anyone here had do do that job before? The quote is $2,500.00. He also said that power sliding the boat likely contributed to the premature failure. I've only done that a few times, Whatdayathink?

[toyotafreak]

I think your swim step looks nice.

What's a burned valve look like, feel like, and how's it diagnosed? Sorry to hear, buddy. Worst case must be pulling the head and having the valve mating surface cleaned up. Not horrendous, but sure, a big job. The valve train shimming looks like a bizatch, but really don't know - the last head I worked on was an 87 Honda 12-valve.

[Boballoui]

The burned valve was the diagnosis from my mechanic, the symptoms are:

a) Very rough idle, a "chug" is felt when throttled up 
b) Some loss of power out of the hole
c) a maximum achievable speed of about 36mph.
d) Exhaust manifold on the left side of the engine, is much cooler than the right side.

My diagnosis before taking it to my mechanic was go through all of the normal stuff, fuel filter etc. then I disconnected the plug connector wires while it was at idle. The computer does alarm, (very annoying) but when I reached the cylinder that was not firing, there was no change in the engine idle rpm.

Furthermore, the a "PSSST" sound can be heard from the exhaust on the left side. My mechanic said that he could do a "leak down" test to confirm it, but the labor $$$ would be better spend at removing the head.

Thanks for the compliment on the swim step, I really like the teak finish as well.