Attaching engine mounts to beds

[mwybo]

I am at the point in a repower project that I need to design and begin building the new beds. My question is what is the preferred method for attaching the engine mounts to the beds. Current options being considered are:

1. Lag screws directly into wooden beds,
2. steel bar on top of wooden beds, holes in steel bar threaded to accept mounting bolts, or
3. Angle iron mounted on wooden beds drilled to accept bolts secured with nuts (holes not threaded).

What do you suggest ? Any other options ?

Thanks

(36 foot fibreglass hull, will glass wooden beds into hull, 18 hp BETA marine 3 cylinder with mechanical reduction gear replacing Perkins 4-108 with Velvet Drive)

[Todd D]

Pretty much every engine I have seen has the mounts attached to the wooden veds with lag bolts. A question for you. If you go with either drilled and tapped steel flat bars or through drilled angle irons, how do you plan to attach the steel to the beds? I suspect you would use lag bolts. If that is the case, why not just lag bolt the motor mounts directly to the beds.

[carioca1232001]

I have used SS 1/2 " lag bolts myself for the same purpose tapped into wooden blocks and the latter affixed to the engine stringers with SS 3/8" through-bolts.

The said SS lag bolts withstood the Starboard engine wobbling on its engine mounts at a 60% throttle setting on an off-shore passage, when the vertical section of the main prop strut fractured (the weld) from its hull seating , resulting in the prop shaft being held in place by the small prop strut by the hull-entry point.

The captain in charge (not me !) suggested not to switch off the Stbd.engine, but looking back, I think that it may have been reckless to have continued the voyage in this manner.