Re: Poor Man's Skiboat...Restore?
The other day I noticed that the idle was not very smooth. I guess I figured it was the carb needing to be rebuilt, but I ran another compression test anyways using the latest Mecrusier specs.
Results:
1 100 < - went up with oil added
2 120
3 120
4 120
5 30 < - went up 10psi with oil, not enough to matter
6 60 <- went up 10 psi with oil, not enough to matter
Since the head had been pressure checked, the cylinder walls were in good shape, no holes in the pistons, and the head gasket is fine it must be something with the valves. Time to pull the head again.
In about 2 and a half hours the head is back in my shop and I am re surfacing the valve seats. I am really surprised the other valve were not leaking and although the valve seats look fine after resurfacing with compound the valves all probably need to be replaced, but I will do that this winter when the engine is out. Now for some pictures.
5 and 6 before I pulled the valves
Intake on 1 and 2 look wet because I was spraying them to check for leaks. They had none.
The valves are out
A not so good picture of 5 and 6
This is after lapping the valves. Some seats aren't shinny because of the WD40 I am using to inhibit rust.