Alpha One Outdrive Pressure Loss

[Chemdawg]

I replaced all the seals in the upper outdrive, and most in the lower unit. I made my own pressure tester, and screwed it in to the vent hole up top. I ran it up to 15 PSI on my gauge, and let it sit. Now this was at about 9 am when I did this. It is now 8 pm, and it's down to about 13 PSI. I have seen people state that they filled it with air and had it go for 24 hours without any air loss. Is there any other place I need to check for the possible air loss. I am using my spray bottle with soapy water in it, and sprayed all the places that I would expect that air could escape. Not even sure, but is the 2 psi loss over 11 hours ok?

 

[Bifflefan]

Re: Alpha One Outdrive Pressure Loss

I made my own pressure tester

Is your gauge/tester leaking?

 

[Chemdawg]

Re: Alpha One Outdrive Pressure Loss

I sprayed soapy water on all of that too, and it's not leaking at the tester.

However, I did find this link here:

http://forums.iboats.com/mercruiser-i-o-inboard-engines-outdrives/od-presure-test-524743.html

Reading what Don posted from Mercury seems to tell me it's not a race to see who can hold their breath the longest. It says 7-10 PSI for 5 min, and 15 PSI for 10 to 15 min. Well, I did all that, and turned the shaft, etc, and it held. So 11 hours at 15PSI, doesn't seem to be any real test.

I did not Vacume test it yet. But I am going to try that next to see how it does.

 

[bspeth]

Re: Alpha One Outdrive Pressure Loss

did the outside temp get cooler as the day went on?

 

[achris]

Re: Alpha One Outdrive Pressure Loss

12psi for 30 minutes. No pressure drop? Oil it up and go boating.... You won't see any shop testing for any longer than that....

Chris.........

 

[Chemdawg]

Re: Alpha One Outdrive Pressure Loss

That's what I'm talking about! However it's on the stand sitting till spring

 

[Boomyal]

Re: Alpha One Outdrive Pressure Loss

That's what I'm talking about! However it's on the stand sitting till spring

I think you are good to go, Chemdawg. Time to find something else to obsess over for this coming winter. :tongue-new: