Re: Evinrude Tilit and Trim realease valve
the manual release valve is NLA. it can be repaired if it is not damaged. there is a specialized seal on the very tip. That can be a cause of bleed down but usually is not. The check valves almost always break before the MRV.
You need to be extra careful not to damage your MRV, wallow out the screwdriver fitting, or snap off the aluminum. I have been toying with the idea of turning an aluminum plug on my lathe to fit the MRV hole. But, even if I take the time to design this part, it simply disables MRV so that the valve body can lift & lower properly. If you damage your MRV then I doubt you can get it back without buying a whole new valve body.
that said, if the snap ring is still prefectly flat then you may reuse it. gently pull it open to creat a 1/8" wider gap. use low power dremel ($9 harbor frieght special is perfect) with 3/8" diameter cutoff wheel to clean the groove. You will also need a rubber polishing bell for your dremmel. carefully polish the smooth aluminum between snap ring groove and threads. This needs to be shiny smooth, clean, and lubcricated before you put the mrv back inplace. Otherwise you might tear or cut the oring. You can simply grind a 1" cutoff stone down to 3/8" on a piece of scrap metal. The rubberized polishing bell is usually blue in color and appears to be a very find grinding stone. It is actually impregnated rubber. The black rubber trim ring should be put back in place on top of the snap ring after assembly. It is not a critical part. It just keeps dirt from getting stuck between snap ring and MRV.
as far as fluid coming out from MRV ... that is oring on body of MRV. I think it is either size 012 or 011. I would buy one of each and see which fits.
