The drive unit (outdrive) carries power from the inboard engine, typically mounted above the waterline, outboard through the transom and downward to the propeller below the waterline. The engine sits just forward of the transom while the drive unit ( outdrive or drive leg) lies outside the hull. When you have a boating supply need or just want to explore your upgrade options with a pro who shares your passion for all things nautical, call us at (877) 388-2628.The outdrive unit of a boat with sterndriveĪ sterndrive or inboard/outboard drive ( I/O) is a form of marine propulsion which combines inboard power with outboard drive. We’ll be glad to listen to your requirements and recommend the best boat propeller options for your craft based on how you use it. We are boating enthusiasts too and understand every aspect of boat maintenance and repair. When shopping for a new boat propeller, we invite you to speak with the boating pros at Wholesale Marine. The deciding factor will always be the particular application the boat is used for in order to determine the number of blades required to achieve the best engine performance. “Standard rule” is the fewer blades, the faster the vessel, however, this rule is not cast in stone. The number of blades is also a consideration. Overall engine performance can be improved by selecting the right boat prop. This will also determine the propeller’s RPM capabilities. The right propeller will turn the minimum engine RPM’s required by the manufacturer with its throttle fully advanced. To make the best selection, sync the propeller to the manufacturer’s wide open throttle (WOT) range. Sizes are referred to in terms of diameter and pitch. Boat propellers are available in a wide assortment of sizes and shapes. Selecting the right propeller is very important. The difference for water-based craft is, of course, that the drive train ends at the propeller which is the liaison of horsepower to the water. There, the choice is simple: select the right tire for the roadway and intended vehicle use. For land vehicles, the system concludes at the tires, where the rubber meets the road. The drive train is an important system on any engine-driven vehicle, car, truck or boat.
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