Re: Mercury Mark 5, first run, first problem

[billw]

I’m not saying this should be law but I always have run my Mark 5s and 6s on 24:1 and have never had a problem. I also use 90 weight gear oil with no shift problems….but in my case that’s okay because I have nice, tight, resealed cases. As for loading up, make sure there is gas/oil spewing defiantly into the lake, from that little copper tube sticking out rearward, below the power head. Some people assume it will be water discharge but it’s a crank case drain. God Bless 1950s America….but don’t let the clam cops see it.

Long live American manufacturing!