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| Gear Oil for 1975 50 Johnson (50ESL75... |
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Message |
    
Young Bonner
Member
Username: bigyoung
Post Number: 33
Registered: 05-2008
| | Posted on Wednesday, July 08, 2009 - 10:29 am: | 
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Mr. Joe/ JWB,
I've been using the Walmart Supertech Marine 80W-90 lower unit gear lube (APL GL-5) in my 1975 50 HP Johnson.
You guys will know this is not an electric/solenoid shift lower unit. Page 2-4 of my 1975 Johnson Outboards Service Manual for this engine advises to use OMC Premium Blend Gear Lube and if not available to use GM Dextron Transmission Fluid. I'm thinking that 80W-90 is the correct weight and that the Dextron Tranny Fluid would be to thin. Am I OK with 80-90 weight gear lube? |
jwbmarine
Senior Member
Username: jwbmarine
Post Number: 4590
Registered: 11-2005
| | Posted on Wednesday, July 08, 2009 - 08:15 pm: |
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yep....not sure why it states such thin fluid,ur correct,in that,it is a straight mech shift...since they had just come off the elect/hydr shift units,maybe,they had an affinity towards the thinner fluid..the correct fluid,would be the reg hypoid 80/90 that u r trying to use...u r just fine w/the supertech. |
Young Bonner
Member
Username: bigyoung
Post Number: 34
Registered: 05-2008
| | Posted on Wednesday, July 08, 2009 - 10:17 pm: |
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Thank you JWB for your comments. I called my dealer back home and the fella on the phone asked a mechanic who advised that my 1975 50 HP has a pump in the lower unit that requires the lighter weight gear lube. My motor is probably older than the guy who answered my question.
I'm going with JWB's a response and will review my manual to be sure that i don't have that pump. |
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