Electric trim tabs are used to maintain optimal powerboat’s trim (its fore, aft and athwartships attitude in the water) for best performance in different water conditions.
Principle of operation of electric trim tabs is as follows: when a motorboat is moving through water, the lift force generated during movement of the boat can be adjusted by raising and lowering either one or both trim tabs. Selection of proper trim tab inclination angle by pressing the control keys allows to prevent the boat from leaning to one of its sides, as well as to eliminate possible trim by stern.
Before proceeding with mounting of the trim tabs, make sure that the distance from the lower trim tab attachment point to the upper edge of the upper actuator bracket is at least 355 mm – otherwise it is not possible to install these trim tabs on your boat.
At the moment, our company produces 3 trim tab versions for motorboats of different length.
For powerboats with a length of 4-6 m
For powerboats with a length of 4.8-7.5 m
For powerboats with a length of 6.4-9 m
This section describes how the trim tabs are used. Please read this manual carefully before using the device.
The trim tabs are operated by 2 key switches. You can adjust tilt of the boat as follows: – when you press both keys switches DOWN when the motorboat moves in water, the bow goes down, so that the boat easily comes into the hydroplaning mode; – when you press both UP keys switches, the bow rises and effect of the trim tabs declines; – if the boat heels to starboard (right), level it by holding the right key switch pressed DOWN until the boat gets levelled and then set the key to neutral position and thereby fix the trim tab position. If the boat heels to the port side (left), level it by holding the left key switch pressed DOWN until the boat gets levelled and then set the key switch to neutral position.
We recommend placing both trim tabs to lower position by pressing both key switches DOWN when starting motion of the boat. Trim tabs will create the lift force at starting, and your boat will quickly reach the planing speed. As soon as the motorboat starts motion, lift both trim tabs up by pressing both key switches UP. Depending on the boat loading, you may not need to lift the trim tabs to the uppermost position but leave them lowered to a certain extent to give a smooth and comfortable ride; in such a case, set both key switches to neutral middle position at the right moment to fix the trim tabs in the required travelling position.
If you notice that the boat heels to on one of the sides, press the key switch of side to which the boat trims DOWN. I.e. if the boat heels to starboard (right) – press the right key switch, and if the boat heels to the port side (left) – press the left key switch. Control levelling of the boat as you hold the key switch pressed DOWN and the trim tab goes down. As soon as the boat gets levelled, set the key switch to neutral position to fix the trim tab in the required travelling position and continue riding the boat.
When you reach the mooring area, press both control key switches up to move the trim tabs to the neutral upper position. This is especially important when loading your boat onto a trailer. Failure to do this may result in damage to the trim tabs, making them inoperable. Follow the same operation procedure at each boat ride.
Technical description and configuration
Complete set of transom plates
Trim tabs 2 pcs. Upper bracket 2 pcs. Lower bracket 2 pcs. Control panel 1 pce. Control key switch 2 pcs. Electric actuator 2 pcs. Cable with connector for the control key switch 2 pcs. Heat-shrink solder seal wire connector (tube) 2 pcs. Mounting kit 1 set User manual 1 pce. Warranty card 1 pce.