Malibu Boats 1982 Owner's Manual

Malibu Boats 1982 Owner's Manual Manual pdf 35 page image

4-6 CHAPTER 4: OPERATIONSport Boat Owner’s ManualDrive Trim AngleTrim angle is the angular relationship between the lower drive unit and the tran-som of the boat. Boat trim while underway greatly affects boat performance andefficiency. For best results, the boat should be on plane and trimmed to reduce thewetted surface. With less boat in the water, both speed and fuel economyincreases. Engines with manual trim must be adjusted for best overall operationfor the load and conditions. Engines with power trim should be adjusted continu-ously for best results.If the engine is trimmed in too far (closer to the boat bottom), speed drops, fueleconomy decreases, and the boat may not handle correctly. However, it does pro-vide better acceleration from a stand still; and because it forces the bow down, vis-ibility is improved. If the engine is trimmed out too far (away from the boatbottom), steering torque may increase, the boat may be difficult to get on a plane,and may bounce.Do not trim the engine out too far or the boat may begin to “porpoise”(bounce up and down). Porpoising reduces control and visibility.To use power trim effectively, always start with the engine trimmed in. As the boatplanes, increase the angle out. Experience is the best teacher for understandingproper trim.CORRECTIN TOO FAROUT TOO FARKC-1150UPTRIMDNUPTRIMDNUPTRIMDN! WARNING