Home made pressure test gauge

[Danosll]

Here is a pic of pressure test gauge I made. Under $10. That's a shrader valve on one end , old pressure gauge I had lying around. You can even use a dial type tire pressure gauge. And a small bicycle tire pump. I made it all 1/4 NPT . But u could use 1/8 NPT.

 

[Sportster-2001-951C-Stock]

Good job man! I have made quite a few of these over the years, at the shop I have a very old set bought through Mercury I think it was (or maybe Johnson), to do both pressure and vacuum testing of the stern drive gearboxes. For those drives I always check both ways.

 

[Danosll]

Thanks very simple yet effective. my initial idea involved an old automotive vacuum gauge. But it only allowed for 10 lbs positive presure

 

[Sportster-2001-951C-Stock]

Yeah, in that case it won't do your pop-off for sure. I guess you could swap the gauge head or just make up a second manifold for vac testing but still need a reverse pump to pull vacuum so the automotive vac gauge still isn't much help....

There are some hand pumps on fleabay that can do both vac/press where they have a little manifold on the head end with two ports and double check valves, and have seen gearbox pressure testers too, that stuff quickly gets expensive.