Since it is necessary to raise the engine about six inches higher when attaching our jet drive, some people use a jack plate instead of fabricating a transom riser block. It is not necessary to use an hydraulic jack plate since once the correct height is established for the jet drive, it is not necessary to change it. Due to a four to five inch set back when using a jack plate, it is usually necessary to attach a twelve inch wide plate to extend the bottom of the boat back to the jet intake to control water height reaching the intake. We have a manual jack plate, part no. 1570, which includes this plate and provides eight inches of travel so that either the jet or propeller drive can be used without removing the motor.
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