Malahini Transom question

Designs for inboard or outboard power

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dstribling
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Malahini Transom question

Postby dstribling » Mon Dec 25, 2017 11:45 am

Happy Christmas to you all!

Quick question about the transom on a Malahini.

I cut the motorboard to 15'' as per the plans, and only later realised the new motors will need 20''.

Would it be okay to just glue on an extra piece on top of the motorboard, to make up the required thickness ?

Also, for something like the 80hp Mercury, what width would be required?

https://www.mercurymarine.com/en-gb/eur ... 80-115-hp/

I imagine it's more wise to make the cut-out after I have bought the motor?

Thanks,

Darren
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vupilot
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Re: Malahini Transom question

Postby vupilot » Mon Dec 25, 2017 10:30 pm

Not a huge problem on the motor height. Yes, you can glue an extra piece back on to reach the 20" height. I would recommend some kind of mechanical fastening not just gluing in a piece. Maybe drill into the transom vertically and use dowel rod or lag screws from the top down to join the pieces. Or you could have a U shape bracket welded up out of 1/4" material that fits over the transom extension piece and down and screws into the transom below the extension. Many good ways to to fix that up and youll never notice once the motor is in place.

As for width, the nice part about 20" motors is that usually puts the steering all above deck level so you dont need a lot of width for steering clearance. Just be sure to have enough depth that the motor cover and associated fuel and/or steering lines fit inside the well without kinking when tilted up and turned.

dstribling
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Re: Malahini Transom question

Postby dstribling » Mon Dec 25, 2017 11:25 pm

Thank you for the help. Much appreciated.

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Bill Edmundson
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Re: Malahini Transom question

Postby Bill Edmundson » Tue Dec 26, 2017 5:14 am

Darren

Welcome. If you do some bolting on the transom, make sure you don't foul the engine mount holes.

Bill
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dstribling
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Re: Malahini Transom question

Postby dstribling » Tue Dec 26, 2017 5:37 am

Thank you Bill :)

PeterG
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Re: Malahini Transom question

Postby PeterG » Tue Dec 26, 2017 2:04 pm

Part of the necessary changes for the 20" transom setup is moving the 2 x 4 horizontal brace up 5" too, otherwise it'll be too low and will likely be in the way of the bolts through the transom. That also means the transom knee needs to be taller to meet the 2x4 brace. Not a big deal, just little extra work.
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dstribling
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Re: Malahini Transom question

Postby dstribling » Wed Dec 27, 2017 1:21 am

Thanks Peter, another point I overlooked :)

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Re: Malahini Transom question

Postby Hercdrvr » Fri Dec 29, 2017 12:46 pm

How about a jackplate?
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