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Jackplate and mounting holes not matching up

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Jackplate and mounting holes not matching up

Old 05-25-2019, 12:39 PM
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Default Jackplate and mounting holes not matching up

guys I’m in the middle of installing a new jack-plate on my flats boat. The bottom bolt holes seemed to be off and they are drilled a bit bigger that the top holes. The question is should I take the boat to the fiberglass guy and have him fix the holes or should I drill the jack-plate to match what I have now? The pencil marks are how much they are off.



Old 05-25-2019, 12:53 PM
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I would have the work done to the jack plate and leave the transom integrity alone. Maybe an adapter can be made that mates the two without having to mess with either.
Old 05-25-2019, 05:33 PM
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Double check your mounting holes mine matched up perfectly.
Old 05-26-2019, 02:27 AM
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Contact the jack plate manufacturer if your sure the holes are not aligned correctly. You may have a plate designed for a different application.
Old 05-26-2019, 02:48 AM
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What's at the other end of the jack plate? Could you have both a pad on the transome and one on the the jack plate? The combination would make it higher than needed.
Old 05-26-2019, 03:52 AM
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What motor are you mounting to jack plate? Seems to me if the motor lines up on the boat holes then it should fit the jack plate holes.If not I'd say the jack plate was bored wrong.
Old 05-26-2019, 04:46 AM
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Plate on backwards???
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Old 05-26-2019, 05:52 AM
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Originally Posted by marlinpruett View Post
What motor are you mounting to jack plate? Seems to me if the motor lines up on the boat holes then it should fit the jack plate holes.If not I'd say the jack plate was bored wrong.
And if the motor has slots on the bottom?
The OP said the lower holes were much larger, obviously drilled wrong and wallowed out to fit. Easier at this point to oval the Jack plates holes to match.
It's really quite simple;



Last edited by bills106; 05-26-2019 at 06:47 AM.
Old 05-26-2019, 06:37 AM
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First thing to do is call Bob's Machine Shop.
Old 05-26-2019, 07:02 AM
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Originally Posted by bills106 View Post
And if the motor has slots on the bottom?
The OP said the lower holes were much larger, obviously drilled wrong and wallowed out to fit. Easier at this point to oval the Jack plates holes to match.
It's really quite simple;
this is what I did. The holes in the transom were off. It looked like they drilled them at the wrong angle or drilled the top holes then just drilled in the slot of the motor mount. I made a slot in the plate to make it work. The motor is a f115.

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Old 05-26-2019, 08:31 AM
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Had the same issue with a bobs, i put it against a transom drilling jig and it was off just a tad. I ended up drilling a couple of the holes in the plate out to 17/32 and it gave enough wiggle room to mount without binding bolts...

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