2000 Kamberra porpoising...

[rc5695]

Porpoising: front bounces like going over waves when over ~35-40 mph

I don't remember the boat doing it when I bought it a couple of years ago, but did notice it last summer. Only mod was a bimini top I made, so i dismissed it as being from that last summer, but we went riding around Hartwell yesterday and it was doing it, with no bimini....Hmmm...

Any other older boats doing it? Anybody have any ideas? Prop? I KNOW I've not hit anything and there are no vibrations...

[ChrisK]

Do you have an adjustable wake plate on the transom? If so, try adjusting it all the way down.

[rc5695]

Do you have an adjustable wake plate on the transom? If so, try adjusting it all the way down.

no wake plate and all balast is empty for testing purposes.... With my bimini on it starts around my 34-36 mph slalom speed I didn't test the speed it starts at yesterday. Doh.

[bergermaister]

I get the porpoising at that speed too but usually don't run 35-40mph much. Get some people to sit further up in the front and you may be able to smooth it out.

I've also found if I do a quick cut on the throttle to drop the nose and then hammer it down again it will sometimes smooth out for a while. Just make sure you warn your passengers first!

[New Guy]

RC are you trying to slalom? If not maybe add a little weight to the front. I know the more people I have in the rear of the boat the worse it will get.

[rc5695]

last year w/ the bimini i was getting it while slalomming. i beleived i tried adding weight to the locker and it barely got better while making the wake bigger.

i just like to go fast sometimes...i did come over from an outboard remember

[bergermaister]

Just have all 15 of those kids sit up in the front.

[rc5695]

Just have all 15 of those kids sit up in the front.

They are! Lol.

[ChrisK]

Maybe try accelerating up to that speed a little more gradually. If you're just jamming the throttle down it could be throwing the bow up in the air, getting that first bounce in, and then never letting the boat plane out correctly. Maybe just accelerate slower all the way up to that speed and see if that helps.

[rc5695]

Maybe try accelerating up to that speed a little more gradually. If you're just jamming the throttle down it could be throwing the bow up in the air, getting that first bounce in, and then never letting the boat plane out correctly. Maybe just accelerate slower all the way up to that speed and see if that helps.

Good thought... Thanks!