SD30 Sail drive leaks, Quicksilver vs engine oil

[Hank Hampton]

Need help, I continue to have oil leaks in my sail drive. I have heard that the Spec Quicksilver oil is the cause from a couple of different people here in the Islands. They say to drain and use standard SAE 15W-40. Anyone else hear the same regarding the type of oil used?

[perchance]

You don't mention what kind of saildrive and where it is leaking.

[Hank Hampton]

They are Yanmar SD31 sail drives

[perchance]

Quicksilver drive oil is an extreme pressure lubricant @SAE 90 viscosity. Engine oil will not offer the same protection as the recommended oil. You can use what you like but you do so at your own peril.

[belizesailor]

I would go with manufacturer's spec on oil...and not hersay on the docks. After all, they designed and built the drives.

Don't recall on the Yanmars, but oil spec on my Volvo SDs is the exactly the same as the engines (convenient).

Where are the drives leaking?