#INBOARD WATER PUMP IMPELLER REPLACEMENT CRACK#

It will help you to slide the impeller in place and will help it to turn freely once installed. Save money and time with convenient OEM water pump impeller kits for your Mercruiser sterndrive or inboard engine. Make sure the key is replaced in the same orientation that it was removed. Most impellers that are mounted to a shaft are held in place by a small metal key.Try to mount the new impeller with vanes bent in the same direction Take note of which direction the impeller blades were bent on the original impeller.When installing the new impeller, there are a few things to watch for:

Take care to flush the engine through to ensure that rubber bits aren’t blocking any cooling passages. If they aren’t visible, they may have made their way into the engine. If the impeller is cracked, or has pieces missing, try your best to find any missing pieces. There are many handy tools that can be used to extract a stuck impeller (in a pinch, a pair of screwdrivers tend to work well). When removing an impeller, space is sometimes limited.

The forks pull on the back of the impeller as the screw is turned (pressing on the water pump shaft), forcing the impeller out. It if malfunctions, the engine will overheat.ĭepending on the type of engine, the impeller could be located in a few different places:Ī handy tool to remove an impeller. The impeller is the only device to provide the suction and pressure to move the water necessary for engine cooling. Additionally, if the water pump overheats, it will cause the impeller to break up into small bits.

#INBOARD WATER PUMP IMPELLER REPLACEMENT CRACK#

The impeller is pressed tightly into the water-pump housing and over time it loses its fit, and the rubber vanes can crack or degrade. It is spun by the engine and sucks in water to circulate through the engine. It’s a small rubber device that looks like a paddlewheel. There aren’t many parts to the system and one necessary seasonal maintenance task is checking the impeller. Water gets sucked up from the water surrounding the boat, runs through the engine, and exits through the exhaust system. The marine engine’s cooling system is pretty basic. Mercury Gear Lube Kits KIPA Impeller Water Pump Repair Kit For YAMAHA 60 70 75 80 85 90 Hp Outboard Engines OEM 692-W0078-02, Replace For Sierra 18-3370. This is true for inboards, outboards and stern-drives. What he’s looking for is signs of water exiting with the exhaust: Water exiting means that it is being sucked up and pushed through the engine appropriately - this is the only visual clue that the raw-water cooling system is working. If you’ve spent any time in a boatyard during spring commissioning season, you won’t find it out of place to hear the roar of the engine and see a cloud of blue smoke erupt followed by a mechanic craning over the stern to look at the exhaust. A worn-out impeller is easily identified because the veins are bent.

Inboard water pump impeller replacement