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The water pump impeller of any outboard motor needs to be serviced on a regular basis, a task that if overlooked can lead to big trouble. Most outboard maintenance schedules call for inspection of the impeller every 100 hours, or once a year. And once you’ve paid a tech to drop the gearcase and ...
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The maintenance schedule for your outboard is located in the final pages of your motor operator's manual. All outboard manufacturers recommend that you at least inspect the impeller every 100 operating hours or once yearly, whichever comes first.
Replacing your Johnson / Evinrude lower unit water pump impeller every couple of years is a recommended practice. Impellers are just rubber and as they do their job they can become brittle and crack leading to overheating your outboard motor.
boats.com Senior Editor, Lenny Rudow, walks us through the steps on how to change your outboard engine water pump impeller. It's good outboard maintenance pr...
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Outboard Motor Water Pump Impeller Replacement Guide – Video Transcript. The serial number on the engine we're going to be working on today is 0T147002. If we take a look at the application charts that we provide in the Sierra catalog we're going to be using Sierra part number 18-3319.
An impeller (also written as impellor or impellar) is a rotor used to increase (or decrease in case of turbines) the pressure and flow of a fluid. An impeller for a dam turbine generator
Basic parts of an outboard motor An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorized method of propelling small watercraft. As well as providing propulsion, outboards provide steering control, as they are designed to pivot over their mountings and thus control the direction of thrust. The skeg also acts as a rudder when the engine is not running. Unlike inboard motors, outboard motors can be easily removed for storage or repairs. Bolinder's two-cylinder Trim outboard engine. A Mercury Marine 50 hp outboard engine, circa 1970s Evinrude 70 hp outboard, cowling and air silencer removed, exposing its shift/throttle/spark advance linkages, flywheel, and three carburetors In order to eliminate the chances of hitting bottom with an outboard motor, the motor can be tilted up to an elevated position either electronically or manually. This helps when traveling through shallow waters where there may be debris that could potentially damage the motor as well as the propeller.
Animated image showing the operation of a flexible–impeller pump A flexible impeller pump is a positive-displacement pump that, by deforming impeller vanes, draws the liquid into the pump housing and moves it to the discharge port with a constant flow rate. The flexibility of the vanes enables a tight seal to the internal housing, making the pump self-priming, while also permitting bi-directional operation. The output from these pumps tends to be smooth or gentle when compared to the operation of a reciprocating pump (for example). In 1938, Arthur M. Briggs filed a patent for this type of pump.