What type of lube for a lower unit service

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Caddis295

Cadet
Joined
Apr 5, 2010
Messages
29
What grade/type/viscocity oil or lube do I need to perform a lower unit service on a 98 Johnson 40 hp?

Thanks a million,

Caddis295
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: What type of lube for a lower unit service

80-90 lower unit oil. it has an additive to fight water. any brand will do. i use walmart's Super Tech.
 
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Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,148
Re: What type of lube for a lower unit service

I like to use a synthetic Marine Gear Oil on those newer motors (post 1995 or so). I also think you will find OMC recommends the synthetic.

Regular gear oil is fine for the older motors.
 
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seahorse5

Rear Admiral
Joined
Jan 24, 2002
Messages
4,698
Re: What type of lube for a lower unit service

Chris1956 said:
I like to use a synthetic Marine Gear Oil on those newer motors (post 1995 or so). I also think you will find OMC recommends the synthetic.

Regular gear oil is fine for the older motors.
Click to expand...


OMC, BRP, Johnson, or Evinrude does not make a synthetic lower unit oil. They recommend their HPF-Pro or HPF-XR gear oil, except for the old electric shift motors.

Here is how different gear oils are tested:

http://bwbmag.com/output.cfm?id=1891729&sectionid=308
 
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