having trouble, new motor, boat doesnt agree with

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10-22-2017 | 06:04 PM

#21

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From: On A Dirt Floor

Quote:

Originally Posted by Conquest 230

O i did not add a drive shower still running same one as last motor and same drive, the previous motor never blew the prop off never cavitated, but this thing is bad ,ver

Put up a current )this year) a pic of your drive showing the pick up part of the driveshower.

10-22-2017 | 06:19 PM

#22

Conquest 230

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From: Michigan

Trying to figure out how to post pics of shower

10-22-2017 | 06:31 PM

#23

Padraig

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From: Lakewood, NY, USA

Quote:

Originally Posted by compedgemarine

first. why would it have a 1.36 drive? I cant imagine any one setting it up with a 454 mag and a 1.36 drive as it would be a dog. second, 69 mph at 5700 is around 25% slip with a 1.36 and around 16% with a 1.5 ratio which seems more likely.
the part I dont understand is if the boat ran good with the original setup and all that changed was the increase in horsepower then it should run the same now but pull more rpm. the boat handling as far as getting on plane and any speed up to the original mid 50's should not change. the only reason it would blow out now getting on plane is if the motor makes no bottom end power and has to cavitate the prop to get the power up. that should not be an issue with 500 odd horsepower.

My thoughts also.....something besides hp has changed.

Padraig

10-22-2017 | 06:36 PM

#24

Tinkerer

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From: ALTO, MI

8.5 inches below the bottom - NO WAY it is cavitation or blowing out getting on plane.
Something else is wrong.
4 blade prop is worse because it puts more load on the drive, coupler, clutch causing the problem.
No way it can be blowing out. IT has to be something else.
Any chance he has the celery sticks installed wrong?

10-22-2017 | 06:38 PM

#25

phragle

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From: Toledo Oh

if your 8.5" deep, that is not the problem. Do you have the trim spacers? put them in backwards??

10-22-2017 | 06:38 PM

#26

Tinkerer

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From: ALTO, MI

The rear of the drive where the trim rams mount is the hole where the shaft goes through round or oval?
If oval do you have the celery sticks in front or in the back. They should be in the front.