gearcase oil

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txhunter30

Cadet
Joined
Jan 28, 2011
Messages
11
I have a 1974 johnson 50 hp and am wonering if it is okay to use dexron III transmission fluid in the LU? The manual recommends SeaLube Gearcase Oil or dextron transmission fluid by gm. Have poured over other posts looking for an answer to no avail. Had an extra bottle of tranny fluid so I threw it in and am now second guessing myself because every post I see says to use gearcase oil. Will this hurt the LU, if so, what lube is comparable to the Sea Lube, or is the dexron III acceptable? Thanks in advance.
 
E

e10

Seaman Apprentice
Joined
Feb 3, 2011
Messages
35
Re: gearcase oil

The manual was printed almost 40 years ago,since then they have improved the oils a little bit. If it is a mechanical shift you should use bombardiers hpf gear oil. If it is electric shift use type c.
 
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seahorse5

Rear Admiral
Joined
Jan 24, 2002
Messages
4,698
Re: gearcase oil

The oil to use in your hydraulically assisted shifting gearcase is called Premium Blend, made by BRP Evinrude. Years ago is was called Type C.
 
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