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Vibration under acceleration

Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=51751
Printed Date: November-15-2024 at 3:58pm


Topic: Vibration under acceleration
Posted By: dutchus
Subject: Vibration under acceleration
Date Posted: August-29-2024 at 12:59pm
I have a 1968 Correctcraft Mustang with 318 225HP.

When accelerating, it vibrates bad but cruise around 30 MPH and under, smooth.

12" X 12" prop redone, new strut bearing, aligned strut and shaft alignment, and engine runs great.

Only thing I can think of is mounts.

Any other ideas and where to obtain the mounts?

Thank you


Replies:
Posted By: Jonny Quest
Date Posted: August-29-2024 at 7:59pm
My money is on the prop.  You say it’s “redone”. Care to elaborate?  A new CNC prop is velvet smooth….

JQ


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Current
2003 Ski Nautique 206 Limited

Previous
2001 Ski Nautique Open Bow
1994 Ski Nautique Open Bow

Aqua skiing, ergo sum

Posted By: MrMcD
Date Posted: August-29-2024 at 8:43pm
Any chance you checked the prop shaft to see if it is straight.  There is an allowed run out number to avoid vibration.   I forget what is allowable.  .003 maybe?

Posted By: GottaSki
Date Posted: August-30-2024 at 8:04am
Also, don't dismiss a cold jug or two wires crossed.  an 8   will chug on acceleration, then smooth out at cruise

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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."

River Rat to Mole


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