Pressure testing outdrive

[alaska_av8r]

Don and a few others have mentioned pressure testing the outdrive to determine source of leaks.

My question:
I am looking for a diagram and what parts are needed to make such a device or do they sell them?

Also I am assuming that you would screw them into the oil vent or oil drain??

Thanks

 

[Haut Medoc]

Re: Pressure testing outdrive

Yup, you a make one with a compresion gauge,, some hose, the fitting from the lube pump & a bicycle tire pump.....​

 

[thrasher]

Re: Pressure testing outdrive

And he means a bicycle pump, do NOT use a compressor or you will damage every seal..

Gary

 

[Gary H NC]

Re: Pressure testing outdrive

Or you can buy one on Ebay for a reasonable price that does pressure and vacuum....

 

[alaska_av8r]

Re: Pressure testing outdrive

thanks guys just found some on ebay, initially i was using the wrong search term. I already have a compression gauge, do not have a lube pump so i may just order one online.

 

[Dryon]

Re: Pressure testing outdrive

One can be made that works good with an air compressor using the following parts. Just be sure to watch the gauge when appling the air pressure using the regulator. Do not exceed the presssure called for in the shop manual when testing.

1) Air Regulator Valve 1/4x1/8 NPT
2) 0-60 psi Gauge with 1/8? NPT Male Fitting
3) 1/4? NPT to 1/4? Barb Fitting
4) 1/4? Ball Valve,
5) 1/8 NPT Plug
6) One Foot 1/4? Vinyl Hose
7) Compressor Quick Release Male Fitting
8) Fitting as required to suit part tested

 

[alaska_av8r]

Re: Pressure testing outdrive

thanks dryon......would you happen to have a drawing?

not asking for much am I ..... lol

 

[Scaaty]

Re: Pressure testing outdrive

Heres a pic of mine. Drilled out a screw in my lathe, brazed on an air fitting...screws into the dipstick hole on my VP 280.
Shoved 10 pounds in...found out the oil fill gasket was toast. New, held 10 for an hour, soaped all...found nothing else

 

[Dryon]

Re: Pressure testing outdrive

Here is mine all put together. I use it for pressure testing of fuel systems and carb pop-off pressure. It can be used for testing any sealed systems for leaks.

 

[fendersfender]

Re: Pressure testing outdrive

dont forget about the vacuum test....i have an omc upper that would hold pressure all day....for the life of me i couldnt figure out why i had water intrusion until i per formed a vacuum test....and i quickly found my problem seal

 

[DHPMARINE]

Re: Pressure testing outdrive

You might look at "MightyVac".I bought one years ago,and the manual had an order form to buy an adapter to also let it do pressure.

No idea on the cost,but for those without time to fabricate one,it's a decent unit.Because of it's small size,it takes awhile to 'fill'a large area,but for once in awhile it works fine.

Also great for bleeding brakes by yourself.

DHP

 

[alaska_av8r]

Re: Pressure testing outdrive

Thanks guys for all the input.....