13
May
1987 Mercury 45 HP Impeller Change. 3 Slide the impeller off the spline.
I can only get the lower unit to drop down about two inches and it will go no further.
How to replace impeller on mercury outboard. How to service and replace your water pump impeller on a mercury outboard. 75hp 90hp 115hp 125hpLarger Optimax outboards run the same water pump as do M. This video I replace the impeller on my Mercury 75 75 hp tiller style outboard.
This was also a learning process for me as it was my first time so I share. The maintenance schedule for the 150-hp Mercury outboard motor calls for replacing the water pumps impeller after every 100 hours of operation or once a year. Unlike many of Mercurys larger motors the lower unit found on this model is equipped with a water pump housing that uses a.
This gasket has a neoprene bead built in so no cement is required or should be used. Install the new key which sits in the flat on the shaft. Then slide down the new impeller making sure that the key-way in the hub lines up with the key previously fitted.
Pull off a rubber cap on the side of the bottom of the drive leg and undo a screw that joins the two parts of the gear linkage. Undo two bolts and take off lower section of drive unit. Another 4 bolts then become visible on a small casing over impeller.
Undo and take out impeller and metal ring in which it. Remove the four 10mm bolts securing the water pump housing then remove the housing by sliding it up and off the driveshaft. Remove the impeller and the woodruff key securing it against the driveshaft.
The impeller may come off with the water pump housing or may remain on the driveshaft. 70hp mercReplace water pump impeller. Wayne be sure you removed bolt underneath trim tab gray looking on back of lower unit.
This bolt is hidden you have to remove tab than look underneath there is a bolt holding back end. 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.
1987 Mercury 45 HP Impeller Change. Having Some Trouble Heh thats a few questions. 1 Yup mine does that too.
2 Yup just make sure the seals in the top of the housing are in place. Well a rubber seal and a nylon washer. 3 I didnt have two rubber sleaves but a rubber sleave and a nylon sleave.
Seems you have it together right though. AFTER removing the prop. 1 Mark the position of the gearshift linkage with a Sharpie then unattach it.
2 Remove the bolts attaching the lower leg to the main body and remove it. 3 Slide the impeller off the spline. Clean old gasket off housing use new gasket reassemble in reverse order.
If the impeller blades are damaged check whether any pieces have broken off. Find and remove any pieces so they dont end up blocking the cooling system once the lower unit is reinstalled onto the outboard. Remove the woodruff key under the impeller from the driveshaft.
Remove the pumps impeller. As you do so a small square piece of metal called a Woodruff key will fall from the driveshaft. This is the key that holds the impeller to the driveshaft.
Save the key and open the pump replacement kit. Lay the kits contents out on the workbench. I need to change the impeller on my little outboard motor.
Does anyone know a web site that shows step by step or where can i buy a manuelHow to change a impeller on a 6 horse mercury out boardI would go to west marine or a regular boating store they should have repair manualsthat where i found mineI had to do that one last spring on a 50 hp marinerNot to hard drain oil losen some. Remove all 5 nuts and the hidden bolt and the gearcase should slide free of the midsection. Change the impeller and grease the driveshaft and shiftshaft.
Now with the notor tilted up all the way shove the driveshaft into the midsection. Line up the watertube and. Locate and remove the four screws holding the impeller housing onto the lower motor housing.
Slide the impeller housing up over the driveshaft and pull the impeller out of the housing to examine it. If the impeller blades do not spring back into position easily or show wear and cracks in the rubber you will need to replace it with the new impeller from your water pump kit. I want to replace the impeller on a 5 hp mercury outboard.
I can only get the lower unit to drop down about two inches and it will go no further. Pulling on the unit causes the gear shift lever to move to the forward position. I have tried reverse neutral and forward and in neither of those positions will the lower unit release.