Pressurizing the Lower Unit

[JohnRude]

Made the mistake of going to the Member’s Only page to check out Tools of The Trade and spent hours reading and absorbing some fantastic ideas. Today I build the motor stand.

However, I am trying to find a tool to pressurize lower units before and after I do seals and O rings. Is anything for sale?

[fleetwin]

Steven’s instruments makes some very nice gearcase pressure gages, but they aint cheap.  Nonetheless, this is a solid investment for anyone who is into this hobby.

You can also just buy parts from Stevens as well.  So, you could buy the threaded fitting from stevens, then use a different gage.  Just keep in mind that a bad gage set up introduces errors into your testing procedure.  You don’t want to confuse an actual gearcase leakage issue with a gage/tool  that has internal/hose leaks of its own.

[crosbyman]

this is what I ordered from Amazon and  I used  a Canadain tire  Crank case oiler pump  fitting  on the pressure pump hose

see video… Pressure testing an outboard gearbox

checks pressure and… vacum 🙂

Vidéos Bing

Joining AOMCI has priviledges 🙂

[jeff-register]

Johnyy Rude,

Sent you a personal message,

Jeff

[Boonie]

My buddy showed up one day and gave me a box and said happy bday. This was inside the box along with a bicycle pump. Works great!

[Boonie]

Really wasn’t my birthday but I didn’t tell him that.

[fleetwin]

Again, home made rigs can introduce confusion into the testing process for sure.   Cheesy/leaky gages, poor connections, are just going to indicate leaks that are the fault of the gage set up.

[crosbyman]

some soapy water spray  on  shafts  and GC     should  at least  confirm the leaks   but…. not the vacum leaks .

 

Joining AOMCI has priviledges 🙂

[fleetwin]

And you be very careful not to “over pressurize” the gearcase as well.  Too much pressure will overcome gaskets/seals, and might damage them as well.

[seakaye12]

While it is not capable of testing vacuum….I found that I could easily adapt the pump and gauge that comes with this Harbor Freight item…..

Sometimes they are on sale for about half=price.

https://www.harborfreight.com/radiator-pressure-tester-kit-63862.html

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