redengin
20.05.2021 1:06:47
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Once you have the impeller inside the housing, I have found it easier to rotate the impeller so that the keyway is pointing directly to the rear of the housing. The rear is the end where the rubber water outlet tube slides into. You may have to clean and slightly oil the lower part of the driveshaft for easier sliding of the now installed impeller (which is in the housing) as you push the housing down the driveshaft. Before you get this far though, you will need to rotate the prop so that the impeller/driveshaft key is also aligned at the rear of the water pump baseplate/adapter plate. As you slide the housing down, try to align the key slot with the shaft key. This may take a few tries, before you get it to slide down and started onto the key, then bottom out on the stainless steel base plate. If you get things to where you think it is down, but it will not bottom out by about 1/8", you have the pump housing on backwards as the 2 alignment pegs on the rear of the base have to align with mating holes in the pump housing. here
Panic After Replacement if it Does Not Pump ; If you are using it on muffs or even on the boat, if this happens, shut it down ASAP. There is a garden water hose fitting on the right side of the motor designed for flushing. Hook up your garden hose to this fitting, turn on the water as if you were flushing and start the motor, BUT put your finger over the Pee hole, plugging any outlwet water. This diverts all the water backwards thru the cooling system. After it has ran for a few minutes and warmed up, let go of the finger, it will Pee because this flush fitting is Teed into the Pee hose. Shut it down and replace the muffs on the lower unit water intake and restart the motor. 99.9% of the time it will now be functioning properly.
Reassembly Procedure ; The impeller drive key will usually stay in it's groove in the driveshaft when you pull the impeller up and off. If you are replacing the bottom stainless wear plate, the key will need to be removed. A Vise Grip works great here. more
My explanation for this is that more than likely the motor has sat for a time, (like from fall thru the winter and into spring) and any water inside will have dried up, and with the thermostat being cold will be closed therefore possibly creating an internal air-lock when you try to restart it.
As a test, hook your motor up to a set of muffs, turn the garden hose water on and then start the motor. If it is not "peeing" check the Pee hole for a blockage by poking a wire or heavy monofilament line up into this hole to dislodge this debris. These motors do produce a very generous flow of water here.
Fits the following Chysler Force Outboards Boat Motor Engine Parts: here
1 Piece x Water Pump Impeller
It replaces Sierra Marine 18-8903. more
Fits the following Sears Gamefisher Outboards Boat Motor Engine Parts:
Material: Neoprene and Plastic Hub
If you’ve already read 15 Outboard Motor Maintenance Blind Spots You Can’t Afford to Miss and discovered that your outboard motor’s water pump (#7) is one of your maintenance blind spots, then this post is for you. It’s also for you if you didn’t read that article and you don’t have a clue how to maintain a water pump.
New cartridge insert (L) and old cartridge insert (R) here
Now that you understand better how a water pump works, the video below will make more sense as you watch me disassemble the pump and then reassemble it with new parts. Please forgive the focus problems. The autofocus on my camera went spastic a couple of times. here