I have a 1998 Mariner 40HP. Over the last 5 years of ownership I have been using Yamalube Gear Oil like the one pictures on the left. Today I went to the same boat dealer I always go to that told me the Yamalube oil is what I need. And told them I need lower unit oil. Told them what I had and they told me the Mercury Oil thats pictured on the right. I was hasitent to buy it cause I know I always used the Yamalube, I just wasn't 100% sure what weight. So I bought the Mercury Oil. I get home and go to put the oil away until Monday when I plan to change it and saw that I already had a bottle of the Yamalube. And then I noticed the weights. The Yamalube is SAE 90, 80/90 the Mercury Oil is SAE 90. The brand I could care less about because I'm sure the quality is the same. I'm just confused about the weights.
According to the manual I downloaded off the internet it says to use Quicksilver Gear Lube Premium Blend which is a 80W90.
So which one of the 2 pictured do I use?
Wayne
According to the manual I downloaded off the internet it says to use Quicksilver Gear Lube Premium Blend which is a 80W90.
So which one of the 2 pictured do I use?
Wayne