lower unit vac/psi check ?

[Bobby L]

I read that the lower unit is tested @15hg vacuum and 15 psi. When you do the vac test is there a time factor? And when you do the pressure test do you do it in a water tank? or could someone explane how this is done?
thanks. got milky oil.

 

[bgbass.1]

Re: lower unit vac/psi check ?

drain lower end oil then put lower plug in put in tank and push air though at 5to 7 psi look for bubbles.

 

[Frank Acampora]

Re: lower unit vac/psi check ?

Clymers says to pressure to 10 PSI and hold for 5 minutes. Says nothing about vacuum but I would think it should be the same.

 

[contractorguy]

Re: lower unit vac/psi check ?

Yeah... 10psi for 10 min, while shifting back and forth, and rotating the prop shaft.
Make sure you have good o-rings(or seals) on the oil drain plugs. I had water intrusion, and thought the worst. Pulled the lower and pressure tested. It was the drain plug (ARGH!)

 

[Toon]

Re: lower unit vac/psi check ?

its 15hg and 15psi for 15min