Which gear oil

Captain John · 10 August 2021, 11:47

Originally Posted by Captain John
I have just bought a new rib and Parsun 10hp OB. The manual says us SAE 90 Hypoid gear oil. When I look on the net I see SAE 80w90, 75w90. The only SAE 90s I see are either very cheap and/or large quantities (5L for a 0.320L requirement). Help! I'm frightened to death of wrecking my motor on first change of gear oil.

willk · 10 August 2021, 12:34

The 80w90 is what you need - pick a decent marine brand like Quicksilver:

https://www.quicksilver-products.com...se-lubricants/

Use fresh fibre washers after the change - old washers can fail and allow water ingress.

Jon Tallis · 10 August 2021, 13:44

You should be able to get Hypoid EP90 in 1L cans from any good motor factor.

Nos4r2 · 10 August 2021, 20:12

Quote:

Originally Posted by willk

The 80w90 is what you need - pick a decent marine brand like Quicksilver:

https://www.quicksilver-products.com...se-lubricants/

Use fresh fibre washers after the change - old washers can fail and allow water ingress.

That's the best advice.

Plus, if you use the tubes of Quicksilver gear lube you can do it without having to pay out for a gear oil pump. Just squeeze it in through the bottom hole til it comes out of the top.