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Dominick
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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I have found an engine mounting bolt has vibrated right out

Customer Question

I have found an engine mounting bolt has vibrated right out of its socket Force*****on Bayliner 1990. The bolt will not screw back into thread but just drops into place. When looking under the boat it appears the holes go right through to the underside - in the water. Could I replace the screw with a new screw with lock but underneath the boat? Would this be effective? Was there meant to be a nut on that mounting bolt?
Submitted: 10 months ago.
Category: Boat
Expert:  Charles replied 10 months ago.

Hello, my name is***** will assist you today.

About how long is the bolt?

Jet boat?

Customer: replied 10 months ago.
The one that came out is about 2 inches long. No it is an inboard motor with a stern drive - called a Force ( Mercury) 90 hp. It looks like a 90 2 stroke inboard mounted on a stern drive
Expert:  Charles replied 10 months ago.

Would you please post the serial number of the engine?

Customer: replied 10 months ago.
See pic attached
Customer: replied 10 months ago.
Ok. I will get this to you soon
Expert:  Charles replied 10 months ago.

Soon as I get it, O will look the engine up.

Customer: replied 10 months ago.
BJYC07CHD090
Expert:  Charles replied 10 months ago.

That is the one for the boat. I need the one off the engine.

Customer: replied 10 months ago.
Ok. I will find this soon
Expert:  Charles replied 10 months ago.

Sounds good.

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