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4.0 Johnson. Help!

yotombo5

New member
Recently bought a used 14' boat with a Johnson 4.0 on it.

The motor starts fine, but when I switch it into gear and start accellerating, the boat vibrates rapidly and bounces around, getting worse the faster I go. 10 mins later it was a lot worse with grinding noises, and I could hear the boat slipping in and out of gear. Shortly after, the motor would not switch into gear at all. Still starts fine! I checked the pin in front of the prop to make sure it was still intact. Does anyone know what is wrong with it and what I may need to fix it?

Any tips or advice would be greatly appreciated. Thanks.
 
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