My simple pressure tester fot lower units ( photos )

[kodibass]

things needed to build




2 5" section of 3/8 braided fuel hose

1 2" metal tire valve stem

1 Brass T fitting

2 couplers For T to hose connection


1 2" Aluminum bolt & aluminum ny-lock nut

1 3/8 o-ring

4 small hose clamps

The aluminum bolt & nut are available at auto parts stores


DIRECTIONS: cut head off aluminum bolt place bolt in a vise and drill thru lengthwise. thread ny-lock on to bolt backwards then put on o-ring. place coupler in brass T and hook up both hoses, push metal tire valve in one hose & bolt set up in other. clamp with clamps. screw on gauge and its done.

use a tire pump or hook a tire air chuck to your air compressor and give it a couple quick shots.

 

[Stinkytoots]

Re: My simple pressure tester fot lower units ( photos )

I like it and the price is right!

 

[raczekp1]

Re: My simple pressure tester fot lower units ( photos )

what about the preasure, when you pump air is ok, but is there any reverse valve to stop air to go back when you relase conector from air compressor or air pump?

 

[kodibass]

Re: My simple pressure tester fot lower units ( photos )

Yes the schrader valve stops the air from flowing out just like a inflated tire. to release the pressure just push on the schrader stem.

 

[kodibass]

Re: My simple pressure tester fot lower units ( photos )

Yes the schrader valve stops the air from flowing out just like a inflated tire. to release the pressure just push on the schrader stem.

 

[keefallan]

Re: My simple pressure tester fot lower units ( photos )

That's great!! What are the threads (size and tpi) for evinrude lower units. I will make one of these but, I've never paid attention to the threads on the lower unit fill screws.

 

[crestcraftfishman]

Re: My simple pressure tester fot lower units ( photos )

The tester looks great and the price is right but what are you testing? Maybe I need another cup of coffee.

 

[keefallan]

Re: My simple pressure tester fot lower units ( photos )

Its to test a lower unit for water leaks. If air gets out, water will get in. I just don't know the thread sizes for the lower unit plugs.

 

[kodibass]

Re: My simple pressure tester fot lower units ( photos )

the above tester bolt I used was 3/8 nc 16 tpi you can use a wrap or 3 of teflon tape if it seems a bit loose. I used a extra thick o-ring as well, the gauge was off of a old discarded air compressor. kodibass

 

[Vintin]

Re: My simple pressure tester fot lower units ( photos )

What is the suggested test pressure?

 

[kenmyfam]

Re: My simple pressure tester fot lower units ( photos )

Nice job.

 

[boobie]

Re: My simple pressure tester fot lower units ( photos )

Start out with 6-8 psi and let it sit for 10 minutes and then go to 14-16 psi and again let sit for 10 minutes. If there is a drop put in a tub of water to find the leak. Soapy water also works good.

 

[64osby]

Re: My simple pressure tester fot lower units ( photos )

Nice and simple, good job KB.

 

[achris]

Re: My simple pressure tester fot lower units ( photos )

There's a whole range of pressure/vac testers up in the Mercruiser forum...

Start at this post and work down

http://forums.iboats.com/mercruiser...sure-check-prior-post-233546.html#post1573303

Or this one

http://forums.iboats.com/non-repair...-pressure-gauge-less-than-20-00-a-461923.html