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Old 18 November 2017, 01:51   #1
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Jack Plate with 4 Inch Set Back

Anyone use a jack plate with a 4 inch set back to run a prop outboard higher on transom for swallower waters, does this setup work on SIB's like it does with fishing jon boats and speed boats.
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Old 19 November 2017, 17:20   #2
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The 4 inch set back plate would include a power lift to lift motor 5 inches
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Old 20 November 2017, 03:07   #3
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I'd say a hydraulic jack plate is overkill for a sib and pretty pointless in my opinion
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Old 20 November 2017, 17:25   #4
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Originally Posted by beamishken View Post
I'd say a hydraulic jack plate is overkill for a sib and pretty pointless in my opinion
Not when boating in swallow waters where I boat, I have ordered a hydraulic jack plate, decided on going with this with a prop vs a jet outboard..

My Bombard C4 stays inflated on a trailer.
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Old 20 November 2017, 17:35   #5
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Here is a pic of a rescue or racing inflatable with a jack plate, its not a overkill by any means.
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Old 20 November 2017, 18:14   #6
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That is a totally different set up to yours that is a tunnel hull where there is nothing in front of the prop your bombard is vee hull so the vee is in front of the prop therefore limiting the amount of lift you can go before the prop starts to ventilated and lose propulsion I think your gain will be minimal but happy for you to prove me wrong!
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Old 20 November 2017, 19:45   #7
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That is a totally different set up to yours that is a tunnel hull where there is nothing in front of the prop your bombard is vee hull so the vee is in front of the prop therefore limiting the amount of lift you can go before the prop starts to ventilated and lose propulsion I think your gain will be minimal but happy for you to prove me wrong!
Yep not a good example of my boat, here is other pics, yes I know to high in water it will ventilate but raising enough for swallow waters is what my goal is.

Notice my location, in the middle of the desert, lots of swallow waters around me, ocean is 300 plus miles away.

Just wondering if others on here have done the same.
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Old 21 November 2017, 10:45   #8
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Just be careful as adding setback increases the load on the transom. The photo you put up is a surfcat/thundercat style hull. I have a thundercat with a manual jack plate, its' 14mm thick but no extra setback. The more setback you have the more the water will deflect so the more effective it will be but the more stress will be on the transom
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Old 21 November 2017, 23:48   #9
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Yes I am aware of this that's why I am only going with 4 inch set back not 6 or 12 inchs that some do, also the motor and jack plate total weight adds to exact my transom max weight and I might add additional support if I feel that is needed.

50 hp 4 stroke Tohatsu short shaft weight is 210 lbs Atlas jack plate is 23 lbs and Bombard C4 is rated for 50 hp and 235 lbs max on transom, I should be OK..
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