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Actually Kamie, I didn't feel it slip. It just started to sound different when I trimmed it up high. Maybe it was the exhaust making the noise I heard.
I have a Rebel 15.5 x 17 prop.
And it wasn't easy to get up to 5700 RPM in the boat by myself with 1/2 tank of gas. I expect I could raise the motor up a few inches and move it back a few inches and it would get beter gas mileage and my prop would probably be just about right for me and a couple friends and a full tank of gas.
A jack plate is $200 - $300. It wouldn't be the end of the world if I decided I didn't like it.
By the way, how's your prop testing going Kamie?
I don't believe the Rebel's are know for top end speed. If that is what your looking for then you might have the wrong prop. Other than that, your in the upper end of the range which is good. Determin what your goals are, then Tom would be the best person to suggest props.
My testing will progress, as soon as the boat hits the water. With the current prop she will hit 6000 RPM, so a bit high. The current prop is a 17p Offshore 4 blade. The plan is to swap to the 19P Laser II, and see where the RPM's land, my guess is if I take the engine up a couple more turns, I will land at the 5700-5800 range. which would be just fine. If that is the case, I will swap to a 19P Offshore for my final prop. I prefered the hole shot and handling of the 4 blade when I was testing on the old Merc.
Since I belive the Rebel was designed for the E-Tec and the goals were overall performance and fuel economy you might have the right prop.
From the Evinrude Website:
performance. Larger diameter and efficient blade contour privide faster speeds at lower RPM's to deliver significant improvements in fuel economy. You'll get more miles to the gallon and a longer cruising range.
scrimshaw wrote:
As CBO and Joe mentioned numbers are helpful !I'm not saying you need one of these but I do sense you like I love our toys A quick search showed nothing but performance enhancements for a Boston Whaler V-20 with Jackplate.
I have one question related to the engine height of the Boston whaler 20’. The bottom of the boat seems to be 3” below the cavitation plate. I am wondering if you have any issue getting plane.
