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How to get rid of porpus in '92 Top Gun?

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How to get rid of porpus in '92 Top Gun?

Old 10-03-2012, 08:04 PM
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Default How to get rid of porpus in '92 Top Gun?

I'm getting quite a bit of porpusing at most speeds.It rides good between 38-44mph trim no more than 2-3 on the indicators and 60-70mph with trim as high as about 9 where i start loosing speed.Anywhere between i can run 1 or less on trim and when full fuel i'm running the tabs.Boats a '92 Top Gun HP500, TRS, 26pitch 4 blade turning out.I also boat on the Illinois river which is usually flat as glass which im sure doesnt help.Looking for advice since i havent had the boat long and quite a bit different from my previous 29 PowerQuest.
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Old 10-03-2012, 08:07 PM
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It needs some waves so it can stretch its legs.............
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Old 10-03-2012, 08:12 PM
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I agree with that!
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Old 10-03-2012, 08:29 PM
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get the boat out on lake mi and the porpoise will be gone. definetly not a river boat.
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Old 10-03-2012, 08:43 PM
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TRS guns are usually balanced real well. The TRS guns I run with don't have any popoise issues and they both run 26 pitch bravo 1 props turning out.
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Old 10-03-2012, 08:47 PM
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Drives spinning out IS stern lifting, the gun has a notched transom and thats one reason why they do that from what I am told, my buddy went from a mistress to a gun and said they are totally different like that...

I also hear 42's do it too...

running tab is probably only way to help it, or keep drives in a tad during cruising, I rarely use my tabs.. but the mistress rides more level even though it too will porpoise way more then my 32 Baja did..
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Old 10-03-2012, 09:27 PM
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put blowers on it and drive through the 60-70mph hop
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Old 10-03-2012, 10:45 PM
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Just tuck it in a little bit, I've driven your boat (exact boat) many times. We did the valve job and put the GPS and headliner in it
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Old 10-04-2012, 11:55 AM
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My 94 porpus' in flat water also....tabs(280K's) between 2-3 and its gone.
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Old 10-04-2012, 12:00 PM
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Originally Posted by 88bullet View Post
put blowers on it and drive through the 60-70mph hop
Hahahaha!
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