View Single Post
Old 07-11-2009, 06:44 PM   #2
Charlie T
Senior Member
 
Join Date: Apr 2004
Posts: 302
Thanks: 248
Thanked 178 Times in 84 Posts
Default

[QUOTE=MJM;99491]Boat has been running perfectly, no issues.

Until today.

I'm getting a pretty strong vibration in the lower unit on occasion. It hasn't happened enough to know for sure exactly when, but it has happened when at very low throttle and turning sharply, as well as when in neutral at the dock with the lower unit all the way up. Under way seems to be fine.


It sounds like your U joints are going bad. FYI you should NEVER run the engine with the outdrive "ALL THE WAY UP" This is a sure fire way to ruin the U joints and possibly have them lock up and explode. The all the way up position is also called "trailer" and it should only be used when the engine is off.

I'd bring the boat to a good marine mechanic and have them pull the drive and check/replace the U joints
Charlie T is offline   Reply With Quote