Lower Unit Pressure Tester - fitting to L/U

[Brew2]

Trying to build a lower unit pressure tester, but am having difficulties with the fitting that screws into the fill/vent hole on the lower unit.

I'm using the fitting from an old lower unit oil pump, however, it is a two piece fitting such that you can spin it without the entire hose and pump turning with it. The problem with that is it won't hold air and is useless for purposes of a pressure tester.

I looked in the Iboats store and they have a Sierra oil pump/fitting, but I can't tell from the picture if the fitting is all one piece or two like I already have. Anybody happen to know?

Any other thoughts on where to get this fitting would be appreciated.

Thanks in advance.

 

[telstar1]

Re: Lower Unit Pressure Tester - fitting to L/U

Im pretty sure it will swivel, but the swivel usually will hold pressure, at least mine did.Other alternative is to take a piece of 3/8 threaded rod aout 2 inches long,drill a hole thru it lengthways and you are about 3/4 of the way to having a pressore test fitting.A few washers a bit of grinding and a hose clamp ,youre away.

 

[fat fanny]

Re: Lower Unit Pressure Tester - fitting to L/U

The thing is with the all thread is that it will more than likely won't hold air for long periods of time it needs a registar to seat aginst the countersink of the drain port. I ended up machining one @ work with a o-ring grove that stepped up to a 1/2" male pipe fitting which I then screwed a coupling to recieve my test gauge and pressure fitting (shrader valve) off a "T". You could also try a fastenal or nut and bolt warehouse for the fittings.