Is this a safe transom build?

Craigmail361

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Nov 18, 2017
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Recently acquired a extra long shaft Honda 8 4 cycle engine. Problem is my transom is too short, was this a safe move for me to do?

1/8 aluminum on both sides between transom
transom is 2-1/2 inches thick, 4 inch 5/16-18 grade 8 bolts and nuts

considering mounting a block of wood in the middle to fill cap and screw down to transom, tell me if this is safe!
 

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JASinIL2006

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Doesn't look too good to me. I'd either get a motor with a shorter shaft or a boat with a deeper transom. Or a really strong safety cable/chain so you don't lose your motor when it snaps off the back of your boat!
 

sogood

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May 11, 2016
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361
I agree with the above. The motor has way to much potential movement, pivoting about the transom, in its' current set up. The inverted "U" section housing the motor clamps should be sitting down onto the transom, so any such movement is prevented. Remember you will be travelling in reverse sometimes and all it need is a shift at slightly too high revs to create a might enough kick to say goodbye to your motor. At the very least the transom should be raised, but unless it's well done, you might well find yourself rowing, or swimming.
 

Craigmail361

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Nov 18, 2017
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Okay thank you guys for the quick response, what would be my best bet to lift the transom? If I can build it that would be nice, not sure if I want to fork out the money for a mini jacker!
 

Ned L

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Sep 17, 2008
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Absolutely not, you would be very lucky not to loose your outboard very quickly like that.

If you want to use that outboard you should actually raise the transom. You could go with a ?large sheet? of 1/8 or 3/16? aluminum (something like 14x14 ) on each side of the transom with a filler block to the new height between, and all though bolted. That would give you a solid foundation to mount the outboard on.
 
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Scott Danforth

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Whiskey Tango Foxtrot........ Fix it before you run it
 

Craigmail361

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Nov 18, 2017
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Sorry for the late reply, holidays are crazy.

well anyways I found a local welder who estimated about 50-100$ to make this mount I sent him, this is the final result he has made, picking it up this weekend(hopefully he helps me install, you see the work I already do to this boat) haha

TELL ME WHAT YA THINK!
 

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82rude

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To me that looks much better.My friend built one out of good heavy angle and maple.His supports a 40hp yammy and has been on there for 10 years at least.
 

Craigmail361

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Nov 18, 2017
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Well here’s the final project, all done and feels solid! The anti ventilation plate sits slightly above the bottom of the boat, but I think it should work out just fine, let me know how it looks and should work, thanks!
 

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Scott Danforth

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i give it 3 months of use before the aluminum starts to crack where its welded to the tube. you simply made a hinge
 
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