Mercury Snowmobiles Discussion Board

Finally finished the sled. I decided to go with Polaris clutching and have had good results. My first pass was a 7.44 @ 500 ft. After a few adjustments and five more passes, 7.36, 7.29, 7.24,7.20, my last time was a 7.16 with a 1.87 60 ft time. My best 60 ft so far has been 1.81 sec. Still spinning ...

Thanks for the info. Those numbers look good. Just curios - what do you use for clutches?

I am putting together a stock 75 S/T 440 f/a for grass dragging. The cylinders are out for replating and boring to 68mm. The crank will also be gone through so I will be starting with a fresh motor and new Comet 102C. What speed can I expect to get at 500 feet? Is 70 mph possible? I need to be at 7....