Operation cy to steer to one side or the other. Compen- sate for this as you steer. The trim tab can also be adjusted to help offset this effect. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. also makes the boat unstable. Resistance at the bow is greatly increased, heightening the danger of “bow steering” and making opera- tion difficult and dangerous. TIP: Depending on the type of boat, the outboard motor trim angle may have little effect on the trim of the boat when operating. Bow Up Too much trim-out puts the bow of the boat too high in the water.
Performance and econ- omy are decreased because the hull of the boat is pushing the water and there is more air drag. Excessive trim-out can also cause the propeller to ventilate, which reduces per- formance further, and the boat may “por- poise” (hop in the water), which could throw the operator and passengers overboard. EMU27934 Tilting up and down If the engine will be stopped for some time or if the boat is moored in shallows, the out- board motor should be tilted up to protect the propeller and lower casing from damage by collision with obstructions, and also to re- duce salt corrosion.
EWM00221 WARNING Be sure all people are clear of the out- board motor when tilting up and down, Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted. EWM00250 WARNING Leaking fuel is a fire hazard. If there is a fuel joint on the outboard motor, discon- nect the fuel line or close the fuel cock if the engine will be tilted for more than a Bow Down Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and making it hard to increase speed. Oper- ating with excessive trim-in at higher speeds 49