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Mercury 9.9 4 Stroke - Tachometer / Prop Selection
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<blockquote data-quote="wmk0002" data-source="post: 483530" data-attributes="member: 13975"><p>Those speed numbers match up well with what my 1648 Alumacraft ran with a 9.9hp and 15hp Johnson 2 stroke. I did find that a 4 blade aluminum prop down one pitch was a better overall fit than the factory 10" pitch 3 blade. Sacrificed maybe 1 mph on top speed but it came out of the hole a lot better and did better with a variety of loads - basically was a more universal prop for my setup. I also had a 3 blade that was an 8" that had the best overall holeshot and was the best prop for when I had 3 adults in the boat but was pegging the motor out too hard when I was solo which is more often than not.</p><p></p><p>I now have the 15hp on a 1440 flatbottom and I probably need to swap back to the factory 3 blade for that setup.</p></blockquote><p></p>
[QUOTE="wmk0002, post: 483530, member: 13975"] Those speed numbers match up well with what my 1648 Alumacraft ran with a 9.9hp and 15hp Johnson 2 stroke. I did find that a 4 blade aluminum prop down one pitch was a better overall fit than the factory 10" pitch 3 blade. Sacrificed maybe 1 mph on top speed but it came out of the hole a lot better and did better with a variety of loads - basically was a more universal prop for my setup. I also had a 3 blade that was an 8" that had the best overall holeshot and was the best prop for when I had 3 adults in the boat but was pegging the motor out too hard when I was solo which is more often than not. I now have the 15hp on a 1440 flatbottom and I probably need to swap back to the factory 3 blade for that setup. [/QUOTE]
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Mercury 9.9 4 Stroke - Tachometer / Prop Selection
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