Presure test lower unit ?

[leatherneck46]

Hi,<br />I rebuilt the lower unit on my 1968 65hp Evinrude sportfour. I had the lower unit inspected and was told the seals were in good shape. I still have water in the lower unit. What now? Water pump reseal? How is this pressure/vacumm test done? Thanks Rod

 

[WillyBWright]

Re: Presure test lower unit ?

The gearlube is drained, dran capped, and the tester screws into the vent hole. Pressure or vacuum depends on the tester. It's best to do both. But a good test doesn't always mean good seals. The more pressure you add, the more the seals seal. So it's easy to misinterpret the results. If there's water in there, a seal or gasket is leaking. They're all the same age, so they should all be replaced if any are. Otherwise the leak just moves to the next weakest seal.

 

[leatherneck46]

Re: Presure test lower unit ?

Finding a weak or brocken seal seem like a vary difficult task. I would like to do this job right and be done. Can I buy a complete reseal kit for this lower unit or do u buy each seal. What is the normaly done? Replace one or all seals. I can fix anything thats broke but finding whats broke is proving to be the task. Sounds like the pressure test is a waste of time.

 

[leatherneck46]

Re: Presure test lower unit ?

have the lower unit on hold for now. Replacing the ditrubutor , rotor , wires , and points. stator also. i should replace the wiring harness as well. the insulation is falling off every where "Lots of electrical tape" but what kind of price will I expect to pay for the harness.

 

[wilde1j]

Re: Presure test lower unit ?

 

[wilde1j]

Re: Presure test lower unit ?

Find leak source by submerging the LU in water while under pressure or vacuum ... just follow the bubbles. Seals are bought individually.