Ms. MAK 20SF

[martin]

Originally Posted by slowJEEP

That Rigid Grinder is genius. Thanks all for the suggestions.

Onto another matter. It's time to order material and I'm wanting to go with Coosa BW26 for the transom with epoxy.

I'd say the stuff that came out of the transom was 1.5"s thick and it'd be safe to replace it with the same thickness. However, since I'm going to run a full width dive platform/engine bracket, I was thinking about going with 1" coosa. I'm fielding opinions so please comment.

I know the 1/12*b*h^3 means it will be roughly a 3.375x decrease in stiffness/strength from 1.5" to 1" but I expect the bracket will more than make up for it.

My desire to skimp on material is the proportional decrease in weight and $. I figured I was bias and could be set straight by the CSCers.

I would not go with a 1" transom core.. Not enough meat there when you pull in your bolts. Especially when hanging a bracket. Once you crush the foam just a little it shears off the glass then turns to snot.. Adding a bracket will just compound the force applied to the top bolts and bottom bolts..trailering with a motor dangling off there will really cause some flexing. Water gives a little ..concrete potholes don't .. 1" is great for a 20 hp ...clamped to the transom.. Hell my 13 Boston whaler has a 1.25" transom with a 50 hp and it has cracked some...just my 2 cents