1964 big twin ,LU

[kawk]

hi, i have water intrusion in the LU of my 40452r evinrude. i have read that a pressure test may lead to the culprit. how or where could i get this pressure test done? LU is off and drained. thanks, phil

 

[tashasdaddy]

Re: 1964 big twin ,LU

any dealer, service center.

 

[kawk]

Re: 1964 big twin ,LU

thanks TD,
just wondering if there is a do it yourself method. i dont mind buying tools. i figure it wont be the last or only time ill be checking a lower unit.

 

[lindy46]

Re: 1964 big twin ,LU

You can pick up a pressure gauge pretty reasonably priced on ebay. I just bought the gauge, and pump it up with my own air compressor. You'll need a seal puller, also available on ebay to remove the drive shaft seal, and there is a special rod which I use to remove the shift rod seal, which I also found on ebay. If you're replacing seals, might as well replace them all while you have the lower unit off. Also replace the impeller. Once the seals are replaced, pump it up to about 16psi and see if it holds pressure.

 

[kawk]

Re: 1964 big twin ,LU

hi lindy, thanks for your response. what type of pressure guage? where does it go and how on the lower unit? i can produce 16 psi, but where do i apply it? the oil fill hole? yes i need my hand held. i appreciate the help.

 

[tashasdaddy]

Re: 1964 big twin ,LU

make an adapter that will fit the oil fll hole, attach a rubber tube, to the adapter, and the pressure guage, (you need a guage that reads low pressures). then attach a value to close and hold pressure, then an attachment to apply the air. start with low pressures. do not go above 10Lbs. the idea is to apply pressure, close the valve, and see if the pressure holds. if it does not, use soapy water to find the leak. you can use a bicycle pump, no need for air compressor.

here is a link: http://forums.iboats.com/showthread.php?t=88919

here is a tester. http://cgi.ebay.com/ebaymotors/Outd...5229985QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear

 

[lindy46]

Re: 1964 big twin ,LU

hi lindy, thanks for your response. what type of pressure guage? where does it go and how on the lower unit? i can produce 16 psi, but where do i apply it? the oil fill hole? yes i need my hand held. i appreciate the help.

Check this link - sometimes this guy has just the pressure gauge listed - I think I paid around $25.
http://cgi.ebay.com/ebaymotors/Inbo...5229313QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear
The gauge just threads into the L/U drain hole/oil fill hole. Yes, you can just use a bicycle pump, an air compressor is not necessary. There is not a lot of space in those lower units, so it doesn't take much to pressurize them.

 

[tashasdaddy]

Re: 1964 big twin ,LU

same guy i refered him to.