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09-25-2020, 10:00 AM #46Member
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Do twin engine boats chine walk ?
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09-25-2020, 11:33 AM #47
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09-29-2020, 06:28 AM #48Member
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09-29-2020, 01:33 PM #49
I'd say you could bring the motor up quite a bit. Your prop shaft would be at about the right height - if you didn't have so much setback. Remember, the further you go back, the more you have to come up. To give you some perspective, here's the motor on my 22' Progression with 8" of setback.
Last edited by TooStroked; 09-29-2020 at 06:09 PM.
1992 Progression 22
Mercury Racing 250R
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rgsauger liked this post
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09-29-2020, 01:55 PM #50Member
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I see what you mean, makes perfect sense.
The next time I’ve got her off the lift on the trailer I’ll raise the motor up a notch.
Thanks.
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09-29-2020, 03:06 PM #51
I can tilt the bow side to side on my Grandsport with just a small change [+/-] in the trim. Usually I will adjust my setup according to weight, fuel and passengers with engine height, trim and throttle until it is in the sweet spot. If I floor the throttle [90+], there is not a sweet spot unless I have a couple of passengers. In an Allison, too low a propshaft makes it hard not to wobble.
"Confidence" is that wonderful feeling you had right before you fully understood your true situation.- Unknown
I don’t know what effect these men will have upon the enemy, but, by God, they terrify me.- Duke of Wellington“I am not afraid of an Army of lions lead by a sheep; I am afraid of sheep lead by a lion.” – Alexander the Great
Whoever said the pen is mightier than the sword obviously never encountered automatic weapons.-Douglas MacArthur
Allison GSE 300XS
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TooStroked liked this post
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09-29-2020, 06:17 PM #52
You're welcome. Remember though that even set where I am - which is as high as I can go and still get out of the hole - I get chine walk above about 60 MPH. Between the Latham wing plate hydraulic steering and 25 years of seat time in the boat, it's a piece of cake to handle.
One other thought. You have a 4 blade prop which by definition will give you more lift. If you couple more lift with the motor being too deep, think of the effect as the motor trying to lift the stern. That'll force the bow down and more importantly, cause you to rock side to side at the stern. Yea, that's textbook chine walk - maybe on steroids in your case.1992 Progression 22
Mercury Racing 250R
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09-29-2020, 07:00 PM #53
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