Boat Repair/mercr. i/o

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Question
1979 4winns 140hp 3L
I'm getting a chatter/rattle at the outdrive w/engine running.
and odrive trimmed up (in neutral) gets better when i lower the drive. also hear it worse while turning sharp.
  
 is it? gimble bearing or drive shaft possibly?
what do you advise.

Answer
the gimbal bearing and u-joints are the problem.. Pull the stern drive off and inspect and or replace the u-joints and or gimbal bearing..With the drive off you can look right at the bearing in the transom assembly..and th ujoints are on the shaft of the drive..

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Everett Peacock

Expertise

Marine repair questions

Experience

35 years experience boatmansbargains.com

Organizations
Taught Marine electronics at NOVA CC IN ALEXANDRIA VA

Education/Credentials
certified, Yamaha outboards,yamaha stern drives, Mercury outboard, Mercruiser, Evinrude. Johnson, Mariner, suzuki, Volvo Penta, Honda,

Awards and Honors
service exelence award ( yamaha)

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