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why is my cat doing this????

Old 08-10-2011 | 11:44 PM
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are you running boxes and what hp are your motors putting out? im just comparing to mine because you are really flying.
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Old 08-21-2011 | 08:20 PM
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112 mph 5250 rpm with a little positive trim and 200 lbs in the rear fixed the porpus. so the motors are going back.
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Old 08-22-2011 | 09:00 PM
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Originally Posted by outlaw1
112 mph 5250 rpm with a little positive trim and 200 lbs in the rear fixed the porpus. so the motors are going back.
Sweeeet. Read thru this thread and don't see your motor numbers. What HP and torque at peak rpms?
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Old 08-24-2011 | 09:23 AM
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one day i will fly!!!! lol,
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Old 08-24-2011 | 09:33 AM
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I just want to go boating.....
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Old 08-24-2011 | 08:23 PM
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i want to hit 125mph

because the weight in the rear helped im going to move my motors back 12" and i think i can lower them about 6" to lower my center of gravity.

any opions
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Old 08-25-2011 | 06:49 AM
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I owuld think that lowing them 6 inches would really throw off the driveline angle. I would run the boat some more and make sure the weight is what caused the poitive result in the porpoise. For mine water conditions pay a huge factor. Flat water porpoise is very noticable for about a 15 mph range 75-90 maybe. Rough water very little porpoise and its for a small mph range.
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Old 08-25-2011 | 10:34 AM
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Brian, how is the cabin of your boat designed?
is it have the storage on the one side with the bed running side to side?

The reason I ask is im having a huge problem with weight in the front end. I am breaking props left and right. I am on my third set this summer.

I think porpoise is causing this along with too much weight in the front?

any advice would be great!

on another note I put my boat along side my buddies 31 awesome 2001 and his sits 6" higher in the front end???
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Old 08-25-2011 | 01:28 PM
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Originally Posted by phil_p999
Brian, how is the cabin of your boat designed?
is it have the storage on the one side with the bed running side to side?

Yes this is how mine is set up.

The reason I ask is im having a huge problem with weight in the front end. I am breaking props left and right. I am on my third set this summer.

Are you cracking the ears on the props?

I think porpoise is causing this along with too much weight in the front?

any advice would be great!

on another note I put my boat along side my buddies 31 awesome 2001 and his sits 6" higher in the front end???
See answers above.


Going to the the speedmaster on boxes with transmissions and the bigger motors/blowers dropped the back end of my boat about 1.5 inches based oin picures. This 1.5 in the read results in about 3 up in the front. This is all compared to bravos on the transom.
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Old 08-25-2011 | 08:40 PM
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Originally Posted by tssteph
I owuld think that lowing them 6 inches would really throw off the driveline angle. I would run the boat some more and make sure the weight is what caused the poitive result in the porpoise. For mine water conditions pay a huge factor. Flat water porpoise is very noticable for about a 15 mph range 75-90 maybe. Rough water very little porpoise and its for a small mph range.
my drive line is sloping down now the trans sits about 3" above the shaft in the extension box so the driveline angle isnt a problem. its really tight for the oil pan and the water pump needs to be moved. is there a different water pump i can run instead of the stock mercury?
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