Learning to deal with Chine Walk.

[bobby minis]

Do twin engine boats chine walk ?

[MDRURY]

Do twin engine boats chine walk ?

YES!!! They do if you can go fast enough for it.
Anyone can drive my LaveyCraft up till about 80mph. Above that, it has to be "driven".

Michael

[Reynard38]

Finally got that picture.

[TooStroked]

Finally got that picture.

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.

[Reynard38]

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.

[JR IN JAX]

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.

[TooStroked]

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.

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.

[Jimboat]

Chine Walking Article