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Maybe this is a stupid question (let me know if it is). I am prepping my (new to me last summer) boat for launch for the first time and getting the outboard (a 1984 7.5hp Mercury) ready for the season is part of the process.
When I drained the lower unit back in the fall after haulout, out came (eventually) this fairly thick grey sludge. My initial reaction, was: "wow, it really must have been awhile since this stuff was last replaced; either that or a lot of water is getting in here", because the Mercury Marine lower unit oil that I had just bought was much lighter in consistency and was more of a blue colour.
Anyway, I've since noticed that there are heavier weights available for outboard lower unit oil/grease. Have I put the wrong stuff in my motor?
When I drained the lower unit back in the fall after haulout, out came (eventually) this fairly thick grey sludge. My initial reaction, was: "wow, it really must have been awhile since this stuff was last replaced; either that or a lot of water is getting in here", because the Mercury Marine lower unit oil that I had just bought was much lighter in consistency and was more of a blue colour.
Anyway, I've since noticed that there are heavier weights available for outboard lower unit oil/grease. Have I put the wrong stuff in my motor?