You don't have to be a "Tin Smith"


The aluminum fish boat is an extremely practical and functional boat which has probably out-sold almost any other type of boat. They are durable, inexpensive, light weight, and come in almost any size.
There's not a lot you can do to the average fish boat to make it run better, but I have run into a few cases where the handling characteristics needed to be modified to serve the purposes of the owner. Light loads and single person operation, sometimes causes leaning and/or porposing. Balancing the load and changing trim angle of the engine just didn't solve the problem. In those cases, installing a slight trim wedge over the rivets on one or both sides, at the transom, would permanently correct these unwanted characteristics.

Note: Wedges are installed as far out, from center, as possible. .

 There isn't any set dimension for these wedges, as it really depends on the weight and speed  of the boat and the amount of correction needed. The length of the wedges typically  were between 3" to 6" and the height never any higher than 3/8". They can be installed temporarily with stainless screws for testing and then converted to rivets and sealer, when your sure you have the desired correction. You'll be surprised how little it takes to make a big improvement in performance, so don't get too carried away by just putting the largest one on you can.

 

 

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shims.jpg

(Wedges shown to scale.)

Special Note: Wedge fastener location should be selected carefully. 
Be sure wedge fasteners are placed between the hull/transom rivets.


 

For installation tips, see : What is a water proof rivet?

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