Valve 3/8 16 tpi

[crosbyman]

has anyone ever seen these  in 3/8 16 tpi  …. should be great  for pressure testing GC

 

 

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[wedgie]

I made something like by drilling a hole in a spare gearcase plug and soldering a basketball filler needle in to it . works ok !

[elgin2]

Looks like a Schrader valve. I’ve seen those on expansion tanks in a water well system

[crosbyman]

it is a schrader valve but  to fit OMC  it must be 3/8 with 16tpi….if any one makes them

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[labrador-guy]

Yup that fitting is a schrader valve.  You can buy them on ebay.  I built a gear case pressure tester using one of those baby’s.  I had to make a fancy fitting to screw the thing into the gear case but it works good.  I use a bicycle tire pump to pressurizer the housing.  I found a low pressure air gauge at tractor supply.

dale

[crosbyman]

looking specificlly  for  3/8 16tpi…. did not find any  ….. will look again on ebay but if you have a link 🙂

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[labrador-guy]

The shrader valves is 3/8″ pipe tread.  I used a 3/8′ coarse tread bolt and braised it to a fitting that would screw in my “T” fitting.  The tread pitch the OMC gear cases are 3/8″ coarse tread.  Plumbers nightmare but it works!

dale

[nj-boatbuilder57]

Here’s what I did:  I bought a “33T” from this site: https://www.stevensinstrument.com/product-page/s-33-hose-assembly-and-parts

The male “engine side” is 3/8-16 (OMC gearcase thread), and the female side of this fitting is standard 1/4″NPT…from there you can do anything:  whip hose, Tee fittings, add a schrader valve, pressure gauge, etc. ….basically anything that’s NPT.  YOu can custom engineer anything you want.

 

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Tubs

[labrador-guy]

Ya that’s nice boatbuilder!  You have a good seal at the gear case too.  Sometimes my gasket gets whipped out and I have to make a new one.  Good to know.

dale

[crosbyman]

thanks for info .. I’ll see if I can find those 33t fittings locally if not available I’ll probabaly try to order if… not  cost prohibitive.   shipping $$$ are crazy

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