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The bolts that hold my power trim and tilt assembly have been shearing. One had the head sheard off about six months ago. I noticed two more were sheared after I returned from Montauk. Information from Yamaha indicated that the broken bolts are caused from loose motor mounting bolts.
Whether the transom is composite or has some wood in it, compression over time can loosen the bolts. The most stress is put on the transom and bolts during towing. The trip to Montauk is particularly jarring in the GW Bridge/Cross Bronx Expressway area. I stay in the center lane and mostly go 40 MPH but it is still rough.
In checking my four bolts I found that could each be tightened several turns. Yamaha said these bolts should be checked and tightened periodically. It makes perfect sense, but it is something I never thought of.
Whether the transom is composite or has some wood in it, compression over time can loosen the bolts. The most stress is put on the transom and bolts during towing. The trip to Montauk is particularly jarring in the GW Bridge/Cross Bronx Expressway area. I stay in the center lane and mostly go 40 MPH but it is still rough.
In checking my four bolts I found that could each be tightened several turns. Yamaha said these bolts should be checked and tightened periodically. It makes perfect sense, but it is something I never thought of.