How to install an impeller in an outboard motor

They push the cold water along to the parts of the engine that need it. An impeller is a rotating component of a centrifugal pump which transfers energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation.

Secure the motor shroud with the mounting screws.

How to install an impeller in an outboard motor. How to replace an outboard impeller in 15 minutes water pump - YouTube. The water is brought into the outboard through the use of an impeller that draws water into the water intake opening on the midsection of the outboard. The impeller may need to be replaced if the engine is not running properly.

You can install an impeller on a Force outboard motor by first accessing the impeller pump housing. How to Replace the Impeller on a Yamaha Outboard engine - YouTube. Tie an electrical cable-tie around the impeller.

Tighten the cable-tie down until it draws in the impeller vanes into a contracted shape but not overly tight that it is difficult to remove. Press the constricted impeller into the pump housing. As it slides into place the cable tie will come against the outer edge of the housing.

Pull the lower unit down and free of the upper case. Take the lower unit to a work bench and lay it on its side letting any gear oil drain into a small pan. Use a socket to remove the two or three bolts on the top of the impeller casing and pull the casing up over the drive shaft.

All outboard manufacturers recommend that you at least inspect the impeller every 100 operating hours or once yearly whichever comes first. As an astute boat owner its certain youll realize you might as well replace the impeller – slide it off the driveshaft and slide a new one on – since youve already removed the lower unit and the pump housing cover to make the inspection. When the impeller fails the pump cant pump and the engine will overheat.

Ive seen old outboards that got so hot the paint burned off the powerhead. Most newer motors have a warning horn that sounds when the motor gets hot and a program that cuts engine rpm to try and protect the powerhead but Jansen thinks that often may be too little too late. To do that we put the key in place in the slot on the drive shaft take the impeller slide it down the drive shaft and align the keyway on the impeller to the keyway on the shaft.

Now were going to install the housing were going to spray just a little bit of lubricant just to lube that impeller until we get water on it. OUTBOARD MOTOR INSTALLATION Page 1D-2 90-859494R1 JUNE 2000 Installing Outboard to Boat Transom Determining Recommended Outboard Mounting Height 20 in. 10 20 30 40 50 60 70 80 Maximum Boat Speed Anticipated NOTE.

127mm for XL mod-els and 10 in. 254mm for XXL models. Installed water pump impeller BACKWARDS.

What are the chances of it turning aro I made this F-up myself. I use a few spirts of mystery oil in the outlet port before installation. To ensure the fish have regular movements.

Press the pump housing cover onto the blades as you turn the driveshaft clockwise. Flip a yamaha impeller up side down. How do I know if I need a new impeller.

Ignore the symptoms of an impeller in need of replacement only if you wish to purchase a new motor. When the Outboard Shows Signs of Overheating. They push the cold water along to the parts of the engine that need it.

Next time when unsure ask. Be sure to put in that impeller the right way. That way you can still have a good time with your friends and not be worried from putting it in wrong.

Apply gasket sealant to the impeller housing O-ring and to the outside of the water tube grommet. Push the O-ring into the larger of the two bores on top of the pump housing. Push the grommet into to the smaller round boss on top of the housing.

Push the new impeller into the the insert and push the insert into the pump housing. If the gap is too small then take the impeller off and move some washers from the below the impeller to above. This will push the impeller farther down into the liner.

If the gap is too big then take the impeller off and move some washers from above the impeller to below. This will rise the impeller a little out of the liner. Place the new impeller into the housing by slowly turning it counterclockwise and slide the housing back down the transmission shaft.

Tighten the housing down with the mounting bolts and then slide the lower motor shroud back into place with the bottom of the upper motor shroud. Secure the motor shroud with the mounting screws. An impeller is a rotating component of a centrifugal pump which transfers energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation.

It can be cheaper to cast an impeller and its spindle as one piece rather than separately. I looked ahead in the parts book all the 33hps up to 1970 show the same driveshaftpinimpeller numbers. BUT the 1971 40hp that uses the 33hp style gearcase shows a woodruff key but the same impeller part numbers.

So to me something doesnt add up here probably me arithmetic skills. Stand on one side of the outboard at the joint between the lower unit and the rest of the outboard. Position your helper on the opposite side.

Remove the bolts holding the lower unit in place beginning with the bolts nearest the floor.