[electricboats] Electric Yacht QuietTorque Motor Mount on Stringers

I am preparing to mount an ElectricYacht 10KW QuietTorque motor. The original motor mounts are two parallel 2x4s in the engine compartment.

The stringers are going to be fiberglassed and painted.

https://imgur.com/gallery/T5RNtvR

(Fiberglass work partially done by previous owner, more to be done before motor is mounted)

We are going to relocate this boat from Seattle to Everett Washington and then put it up on the hard and do a refit. So the installation basically has to survive a couple of test runs on Lake Union, and one passage from Seattle to Everett. We'll do it as weather permits and try to avoid any risk of storms or high winds.

In the refit I intend to remove the existing motor mounts and replace with something designed for the long term.

Question: Can we use lag screws to secure the motor to the existing wood stringers, or should I drill through the entire stringer and use a bolt with a nut?

 

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