Clunking and vibration

estoltz

Member
Jan 7, 2015
356
Northern Virginia, USA
Boat Info
2006 340 Sundancer with Generator (FOR SALE)
2005 260DA with Kohler Generator (SOLD)
Engines
Dual Mercruiser 8.1 Horizons
350 Mag MPI with BIII (free with the purchase of 2005 260DA)
So I had had a clunking when shifting in and out of gear on our 340 as well as a distinctive vibration. The last time I had this it was caused by a plug wire that was off the plug. Having not been able to find any issues this time I sent it over to the mechanic at prince william. Well I got the call. It wasn't plugs. They hauled the boat out and found that I was missing 3 of the 4 bolts on my coupler. The tech said I lucked out in that the bolts didn't damage the coupler or trans housing when they came out. He put new bolts in. One more thing to add to the maintenance checks. I thought I would share this in the event it save someone some time money and our hassle.
 

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