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The Checkmate Bounce

keith4216

keith4216

Well-known member
How many of you guys get 'the Checkmate bounce'
It seems to occur between plane and 30-35 mph. The bow will bounce on flat water with to much trim. It only takes a hair of trim to settle it and its no big deal. Just wondering If myself and a few others I know have this problem. I'm talking on 21ft and above, less then that I don't know about.
 
Mine porpoises pretty bad at that speed unless I tuck the trim in all the way, which sucks. I was assuming (hoping) it's the prop.
 
keith4216 said:
How many of you guys get 'the Checkmate bounce'
It seems to occur between plane and 30-35 mph. The bow will bounce on flat water with to much trim. It only takes a hair of trim to settle it and its no big deal. Just wondering If myself and a few others I know have this problem. I'm talking on 21ft and above, less then that I don't know about.
Click to expand...
mine does it as well, very sensitive to trim
 
As long as I keep the trim pretty far down its fine, not much point in trying to air the boat out at those speeds anyway. My last boat was an 18 foot bow rider with a small block so it was stern heavy and did it too.

John
 
My Predictor does that. You can give it just a touch of trim below the mentioned speeds, any more and it starts porpoising.
 
It is just the fact that the lifting strakes are doing their job...the boat is moving fast enough to start producing lift and bringing the hull out of the water, but there is not enough speed to have the pad forvide enough lift to keep the boat up as the strakes begin to rise out of the water.....causing the boat to fall back in.....Porpoise!

It is the nature of a fast hull....If you don't like it, buy a baja or a similar big heavy cruiser!
 
Thanks fellows,
I know all about it and how to handle it. Just wanted to inform people about it that don't understand it. :bigthumb:
 
My Pulse 170 did it as well as the Enforcer. I use the trim tabs to calm it down on slow speeds.
 
Gimme Fuel said:
It is just the fact that the lifting strakes are doing their job...the boat is moving fast enough to start producing lift and bringing the hull out of the water, but there is not enough speed to have the pad forvide enough lift to keep the boat up as the strakes begin to rise out of the water.....causing the boat to fall back in.....Porpoise!

It is the nature of a fast hull....If you don't like it, buy a baja or a similar big heavy cruiser!
Click to expand...

Thanks, good to know. This is the first boat I have had that did it so I figured it wasn't normal.
 
keith4216 said:
Thanks fellows,
I know all about it and how to handle it. Just wanted to inform people about it that don't understand it. :bigthumb:
Click to expand...

i know where this thread originated so thought i would chime in keith....

my boat has what they call "trim tabs" which helps alot! between the tabs and the drive position you can eliminate all of what your talking about.....when your ready to throw fuel at the carb just raise the tabs all the way up and raise the drive and away she goes:thumb: wait this comes from a guy that doesnt know how to drive a boat:sssh: the last 2 checkmates of mine ran pretty well as far as i recall:thumb:
 
I got sick of the constant trimming and put a set of Smart Tabs on my Starliner. I love them actually. They are 'automatic' so you don't have to constantly adjust them. Made the boat way more user friendly, less bow rise, no porpoise etc. Was a little tricky finding the right settings. Nauticus will send you different actuators free of s=charge to try till you have it dialed in. http://www.nauticusinc.com/index.html
The downside is makes it harder to get bow up on WOT runs. Not really much slower, just requires more trim. I plane on adding a retractor kit that allows them to be flipped up by a lever for the times when I plan on airing it out.
 
Gimme Fuel said:
I have to keep my drive completely tucked in under 40 to avoid the bounce
Click to expand...


Mine too. This is the answer, it is just a matter of too much positive trim at too low a speed to support that trim. I just keep my drive in until about 40 mph then trim it out and let it eat.
 
My 219 does the bounce pretty bad under 35. Like all have said, trim it in at the low speeds and its fine. The previous owner installed an SE300 hydrofoil on the outdrive and that seems to help quite a bit, however I don't like the way it looks and want to take it off to mount a drive shower, so I'll probably be experiencing more bounce soon.
 
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