pressure testing outdrive

djvan

Chief Petty Officer
Joined
May 3, 2003
Messages
411
OK It's been a long and costly month. I'm about ready to tear my hair out. I have replaced my lower, resealed my upper, replaced gimble bearing, and now am replacing bellows and possibly an exhaust flapper. I have my outdrive off again and hanging on a cherry picker. I made a pressure tester out of a guage, a piece of hose, and an air valve, I turned my shop air down to 20 lbs, and put pressure on the outdrive, I then turned off the air valve and disconnected from shop air. The outdrive held 20 lbs for about 3 1/2 hours. About 3 1/2 hours later the guage is down to 9 lbs. Is this normal? Is there a standard time to run this test? I haven't been able to run the boat enough since lower rebuid to see how much (if any) oil is leaking out. When I did drain the oil ther was no water in it though. I am thinking about a remote oil reservoir, so at least I can glance at the reservoir and have peice of mind that there is enough oil in the outdrive. I can not afford to dump much more money in this boat. Dealing with a Mercruiser 140 hp Alpha 1 gen 1. Sorry so long. Tomorrow I will have calmed down again. Thanks for listening to me vent.<br /><br />DougV>
 

Dunaruna

Admiral
Joined
May 2, 2003
Messages
6,027
Re: pressure testing outdrive

Posted a similar question 3 mths ago with varying replies: Vacuum test (oil drained out). Pressure test up to 5 psi (oil in and oil out). I vaccum tested with no oil and sprayed CRC on joins until leak was found - very minor leak. Volvo 280. Maybe tests are specfic for certain drives? With 20psi for any length of time a leak should present itself, but you may pop a seal or gasket at that pressure. Good luck. Aldo
 

clanton

Rear Admiral
Joined
Jul 9, 2001
Messages
4,876
Re: pressure testing outdrive

Should hold for at least 5 minutes. I would go with the remote oil tank. Make it yourself hyd shop can make hose.
 
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