Saturday, October 30, 2021

Cutting the transom angle.

I thought I'd mention the cutting of the transom angle.  I gave the degree of angle some serious thought before cutting.  I've recently finished the build of a Lumber Yard Skiff that was fitted with a 2005 Suzuki 25HP motor.  I followed the specs in the plans, and angled the transom 11°, however, when setting up the motor I was having problems with the boat porpoising.  I set the motor trim full negative, add a 1.5° transom shim, and fit the motor with a hydrofoil to solve the issue.  I really don't know if this is a motor problem for this model/year, or if it's common with bigger motors??  I've asked around in regard to the Perfect 10, and I haven't heard anything about changing/adding more angle to the transom, so...I'm going with the specified 12°.🤞

The transom angle was cut using a table saw, and having the convex, or back of the transom facing up.  In order to keep it perfectly level when cutting, I temporarily fit two curved pieces of wood on the underside.  I don't have any pics showing the actual cutting, so hopfully this explanation and photos with be enough.
I used the transom to trace the curvature on to some scrap 2x6, then cut it out quick with a jigsaw.  These cuts didn't have to be 100% perfect.
Here are the skis attached with a couple screws.  All ready to slide along the table saw.
A near perfect 12° cut.
After the bottom cut was made, I lined it up on the hull bottom and marked the hull side angle.  The above photo shows the lines I then marked with a carpenters square.  The side cuts were made with ease using a Festool track saw.  I'm sure any circular saw, straight edge and a couple clamps would work great too.

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