Reply To: 2000 Johnson 50hp 2 stroke questions.

[Don]

OK, the unit was full, so no external leaks…
You loosened, then tightened the manual release valve, but still leaks down…
The only other shot you have is to order a new manual release valve, I would probably order some of the rubber tips/orings also, looks like the might be sold separately… Once you remove the old manual release valve, check to see that the rubber tip did not fall off the old valve, and it might be laying inside the cavity, which could cause further problems….
Once you have ruled out the manual release valve, that means there is an internal problem somewhere requiring unit disassembly….A project better saved for winter time, when you can remove the engine from the boat….
Sorry
Don