What weight of lower unit lube?

[Bueller420th]

Hi, I'm going to replace my lower unit gear lube/oil. This is my first time changing it. But when i go to buy some I see a bunch of different weights, like 75 and 85 and also synthetics. I have a Johnson 120 HP. Is there a best route to get? Brands as well?

 

[Bifflefan]

Re: What weight of lower unit lube?

Need to know the year of the motor.
Need to know if its and electric shift or not.

None electric shift uses regular 80/90.
Electric shift uses Premium Blend available at a BRP Johnson/Evinrude dealer.

 

[Bueller420th]

Re: What weight of lower unit lube?

It's a 93 J120TLET , im not sure on the electric shift, I just bought it and im very knew to boats. I just have the SELOC manual for the general repairs but its not specific to my motor alone.