On the flip side if the outboard is set too low it triggers enormous drag.

How to set outboard motor height. Advice on Outboard setup height. Showing the height of Cavitation Plate relative to bottom of the boat. First measure your boats stern or transom from top to bottom measure in the middle of the stern.

Setting the Outboard Height. The motor needs to be set at an optimal height because it causes propeller ventilation issues if it is too high. A long 24 is perfect for the job.

Start with 25mm above the line of the hull directly in front of the engine for every 300mm of set back and then adjust from there. This reduces the power of the propeller especially its push on water. Safely but briskly accelerate.

Check engine height and adjust if required. This is simply a measurement taken from the top of the transom top of the aluminum plate on top of the transom to the bottom of the motor brackets. Too line up a twin engine setup the best way is to get planing straight on flat water with the engines at equal rpms and then disconnect the steering link from the slave engine.

The Plate should be out of the water while on full plane. To avoid these problems you need to figure out the proper outboard motor height. That doesnt have anything to do with what the best height is.

The anti-ventilation plate or cavitation plate on an outboard motor should be no more than about 25mm below the bottom of the hull centre. In this video Ill be mounting a Yamaha Outboard and CMC Jack Riser Plate. 2 - 6 inches of set back are the norm for a microskiff.