Reinforced transom

Outboard designs up to 14'

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jno3441
Posts: 1
Joined: Wed Sep 21, 2016 4:38 pm

Reinforced transom

Postby jno3441 » Wed Sep 21, 2016 4:44 pm

I recently read about a build of a zip. The guy reinforced the transom to accept a 25 horse. I was wondering if there is any certain way to do this.

I understand this may not be something that is commonly done or even recommended. I am merely curious about it as the zip will probably be my first build.

joshuab
Posts: 396
Joined: Sun Apr 26, 2015 4:10 pm
Location: southern oregon coast
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Re: Reinforced transom

Postby joshuab » Wed Sep 21, 2016 7:43 pm

I am currently building a ZIP, it is rated up to 40hp with the transom as originally designed without any modifications, my plan is to run a 40hp, not sure where the "25hp" numbers came from but most zip builders are running 30+hp hope this helps.
I cut twice and it's still too short :mrgreen:

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Roberta
Posts: 5883
Joined: Tue Jul 31, 2007 5:23 pm
Location: East Troy, Wisconsin

Re: Reinforced transom

Postby Roberta » Thu Sep 22, 2016 5:01 am

Installing the motor well will give the transom extra support. Also added two extra mini knees on battens outside the keel and some diagonal bracing. I ran a 50 hp Merc on my Zip. Also, use a transom saver brace when towing to relieve strain on the transom. Here are some pics of the motor well and bracing.

Roberta
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Bumpers 004.JPG
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Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

Moeregaard
Posts: 347
Joined: Mon Dec 03, 2007 11:31 pm
Location: Thousand Oaks, California

Re: Reinforced transom

Postby Moeregaard » Thu Sep 22, 2016 5:51 am

We've been running a 40-horse Mercury Mk 55 (~125 lbs.)on our Zip for eight years now. The transom and surrounding areas were built to the plans and we've had no problems. Adding a motorwell and surrounding deck obviously adds strength by "closing the box," but it's adequate as designed unless you're running a larger and heavier motor. As Roberta says, make sure you use a transom saver when the boat is trailered.

-Mark Shipley
A boat is just a wooden box with no right angles.

Hercdrvr
Posts: 343
Joined: Mon May 11, 2015 12:52 pm
Location: McKinney TX

Re: Reinforced transom

Postby Hercdrvr » Sun Sep 25, 2016 8:27 am

Transom by design + motor well+ decking= plenty strong.
Mr. G L Witt knew what he was doing


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