Quote:
Originally Posted by 2ndamendment
With the current 21p prop and a gear ratio of 1.75, you should be able to get more speed. With more trimming and maybe a touch of jacking you should top out around 68 mph. Looking at the numbers it looks as if your current slip percentage is down around 7%. Very nice.
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I've never heard of the Blackjack running that fast with the 250 SHO. Fastest I have heard is 65. I think I can get there with a lighter load (no real need to...63 is fast enough for me lol). Raising the jackplate the slightest bit slowed me down. I had the motor trimmed as high as it would let me go. I mentioned before I only trimmed it up a little bit but the motor doesn't really trim that high. I definitely had a rooster tail going but I guess I am just used to trimming a lot more on my old boat with a 25 inch shaft compared to the 20 inch shaft now. Sorry for the misunderstanding. I only have 6 hours on the motor and have only opened it up about 3 times. I don't know what the nature of this motor is as it breaks in but I don't think it's going to get much faster. I am extremely happy with my current setup. The cruise performance is exactly what I have always wanted for Big Lake.