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Old 09-28-2019, 10:07 AM   #13
ApS
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Question Hogback...

Quote:
Originally Posted by XCR-700 View Post
Anyone here got experience with Formula boat porpoising???

Ours will do so with the smallest amount of trim on the outdrive.

I have never seen a boat tolerate such a low amount of trim (up) from full down.

If I use the trim tabs (maybe 3 - 5 dots on the indicator) it will bring the porpoising under control and allow greater trim up, but its a funny balance.

Wondering if its unique to the hull (Formula 270 BR) or maybe the stock props are not well suited to our loading and use.

BTW its a Mercruiser 8.2 Mag/Bravo 3 twin prop (stock)

Any thoughts are appreciated.
You don't mention the age or repair of the boat. It could have been stored on a misaligned trailer or misaligned rack that's affected the keel—inducing a "hogback".
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