![]() When we are not building aluminum boats and boat trailers, Koffler Boats manufactures stall fronts, horse mangers, saddle racks and a variety of aluminum camp boxes, camp kitchens and horse packing equipment. Koffler Boats is a fully equipped aluminum and steel fabrication shop. Visit our main trailer page here, or our inventory of used fishing boat trailers here. Any new Koffler boat trailer can be customized to meet your needs. Koffler Boats manufactures high quality, durable fishing boat trailers. Sled Boats, Offshore Boats & Landing Crafts are welded of 5086-H-H32 for maximum strength and durability. For best possible quality and performance, our aluminum fishing boats are continually being tested and improved.Ħ061-T6, one of the strongest weldable aluminum alloys available, is used in both the sides and bottom of our White Water Prams, Rocky Mountain Trout Boats, and Drift Boats. We only use materials of the finest quality. We take pride in building aluminum fishing boats, trailers & boating accessories of the highest quality. Our Custom Boats Include: White Water Pram Boats, Rocky Mountain Trout Boats, Drift Boats, Sled Boats with a jet or prop and with inboard or outboard power, Offshore Boats and Landing Craft models. Whether you are lake or river fishing by yourself or guiding a group of people on the ocean, Koffler’s can custom-build your aluminum boat to meet all your fishing, sporting, and professional needs. The sterndrive engine is heavier than a jet engine, and takes up more space in the boat.At Koffler Boats we manufacture and sell the toughest-built aluminum fishing boats on the market today in a variety of sizes and styles.A jet drive is self-draining and does not require this step. The steering and trim use hydraulic systems that may require lubrication and maintenance, and in cold climates the engine should be “winterized” with an antifreeze solution to prevent the block from cracking in freezing weather. A sterndrive also requires more maintenance than a jet drive.The propeller can also be a hazard to swimmers behind the boat.Because it extends below the keel of the boat, the outdrive and its propeller are susceptible to damage if they impact the bottom or an obstruction in the water, like a rock or tree stump lurking just below the surface.The drive can also be trimmed-which changes the thrust angle of the prop-to help lift the boat on plane from a start and then to raise the bow at speed to achieve a smooth ride and reduce drag, improving top speed and efficiency.The outdrive has a rudder effect to help the boat track true at all speeds and propeller offers very efficient power transfer from the engine to the water.Because a jet drive does not have the rudder effect offered by a sterndrive it may not track as well at no-wake speeds and can be trickier to handle around a dock.Ī sterndrive system mates a V6 or V8 engine located inside the boat with a steerable outdrive and propeller attached to the boat transom (a sterndrive is also often called an inboard/outboard, or I/ O).Ĭommon Features & Advantages of Sterndrives.Unlike a sterndrive the jet nozzle is not trimmable, so the boat’s running angle cannot be adjusted to accommodate changing passenger load or sea conditions, or to gain speed and efficiency.The pump intake can be clogged by weeds, and a stray ski rope or dock line can be drawn into the pump and get tangled inside.The compact four-cylinder engine that powers most jet drive systems takes up less space in the boat and is also lighter than a sterndrive engine, which can make the boat easier to tow on a trailer.Ī jet drive system does have some disadvantages. ![]() Also, because the jet drive impeller is contained within the pump, there’s no propeller to pose a danger when swimming around the transom of the boat.Because the entire jet drive system is located within the hull, a jet boat has minimal draft and can operate in very shallow water-there’s no propeller or outdrive that could be damaged by hitting bottom.A diverter (called the reverse bucket) drops over the jet nozzle to create reverse thrust. The boat is steered by a movable nozzle that aims the stream of water left or right.Jet boats may have one or two engines and jet pumps.The pump draws water from an intake in the bottom of the boat and shoots a high-velocity stream of water from a nozzle at the back of the boat to propel it forward.Ĭommon Features & Advantages of Jet Boats Jet-powered boats use the same propulsion system used in personal watercrafts (PWCs) that mates an inboard engine to a jet pump. ![]()
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