Scarab 29 raise engines?
I have a 97 Scarab 29 twin 350 MPI with bravo 1s. Doing some transum repairs over the winter and a re-power to 383. While im into the transum I am thinking of raising the engines up +3" Current prop shaft centers are 7 3/8 from the bottom.
I have been reading up and educating my self as much as possible...but Im still looking to make sure I am going the right direction. Any tips, thoughts, or theories welcom. Thanks AJ |
Definitely do it. I don't know if I Would go up 3" but 2" for sure.
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If i found that i went up too high...do i the ability on a stock bravo 1 application to space the lower back down?
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It's easy to go down with spacers. I would go up the 3 inches. You will probably have to go to a different prop. Just remember about engine height and the exhaust outlets. IF you go too high you might run into clearance problems.
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Originally Posted by scarab29aj
(Post 4503844)
if i found that i went up too high...do i the ability on a stock bravo 1 application to space the lower back down?
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I agree with ^, put shorties on there and don't mess with the COG
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Good point on the center of gravity being raised...playing devils advocate, I wonder if having two engines could possibly cancel out some of the negative effects of the higher gravity. Just spitting that out there. Thanks for the thoughts!!
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I'm no engineer, but raising the height will increase a pendulum effect of heavier motors higher up
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my engines are raised and had +3 imco boxes on it, prop shafts were level with the bottom, and would not get on plane, 1 inch spacers would get up on plane if I surfed my wake or feathered the throttles back and forth and I saw 87mph once. put 2 inch spacers on and hopped right on plain with satin finished props. and hit 87 mph every time I tried WOT. however it dances somewhat at that speed and if the engines were lower in the engine compartment it would not chine walk as much. so now I have it where the propshafts are 3 inches below and can go down an extra 2 if I need too.
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three to four inches below is kind of the sweet spot with SCARAB's. My 34 was at 4 inches I think. Stepped hulls can usually run higher. SCARAB's need bow lift.
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