Vibration on Bravo Three

W

Wellcraft Excel

Cadet
Joined
Dec 28, 2003
Messages
7
I have a Mercruiser 7,3 litre turbo diesel and a Bravo Three drive and have alot of vibration if i tilt drive up or down from center.<br /><br />Could it be the engine coupler thats broken?? I checked the u-joint and it was feeling tight..<br />The vibration is also there when i drive stright forward with drive tilted up .. Not to far up..
 
A

Adam13

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Joined
Aug 20, 2005
Messages
16
Re: Vibration on Bravo Three

somtimes when your trim is up your prop might be cavitating. when u go fast like that your prop wont be completely under water and will cause vibration. i d k for sure about your other problems with vibration but my boat does that when it is trimed up like that
 
Bondo

Bondo

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Apr 17, 2002
Messages
71,291
Re: Vibration on Bravo Three

That's the driveline I Dream of installing into My Boat,...... Best I've got So Far,.. Is an Engine.......<br /><br />Anyway,........<br />If the U-joints Felt Right,+ Took Grease properly,.... I'd probably rule them out,......<br /><br />Did you Inspect,+ Grease the Gimbel Bearing while you had the drive off,..???....<br /><br />How about the Engine/Drive Alignment,..??...<br /><br />I'm not sure if that rig uses a rubber hubbed coupler,.. Or a metal sprung flexplate,....<br /><br />If it's the rubber hubbed Bravo Coupler,.... I Doubt that's the issue,..... When they Break,... Nothing Moves.......<br /><br />If it's a metal sprung Flexplate,..... I Suppose it's Possible,..... But I'd think it would follow the Engines rpms,.. rather than the angle of the drive...........
 
W

Wellcraft Excel

Cadet
Joined
Dec 28, 2003
Messages
7
Re: Vibration on Bravo Three

U-joints took grease, gimbal bearing is new. Engine alignment is right , i think . I used mercruiser's special tool til align.<br />Rubber coupler is the one installed.<br /><br />I noticed wear and smal marks on the driveshaft that goes in the engine right where the bearing is so that is the clue that points to the coupler i think. Is there more than one way to align the engine and the gimbal bearing??
 
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