Leak Down Test

Leak Down Test
December 22, 2020

Leak Down Test So after pulling the plugs and inspecting them as outlined in a previous post, we are going to do a cylinder leak down test. I have never done this on an engine with this many cylinders. Everything With this Boat Is a Struggle I have found that is is a lot more difficult than working on than a Sea Doo. There does not appear to be a…

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Pull the plugs and see what is going on in the cylinders

Number Eight Plug
December 22, 2020

All good with the plugs. Running rich but not a single plug that looks steam cleaned or new, which is a good sign for valves and the cylinder walls. It also means there is not a head gasket or water intrusion into the cylinder that way. It also means that there is a good possibility there is a crack in the lifter valley or water intrusion into the crankcase from…

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Draining The Oil And Water

Mercruiser 5.0 MPI Oil
December 22, 2020

Draining The Oil and Water First, I started by draining the water is left in the cooling system. There is very little left, but there is still some. As stated prior, I do not want to start this motor again until I get the old oil and water out and find out how it got there. Next, I drain the oil from the motor. This oil is thick and won’t…

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