13
Sep
Press in new impeller housing base seal from the seal kit using a rubber mallet and a ratchet extension and the appropriate size socket Step 2. 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.
This will almost be a guarantee if the motor was run in salt water.
Replacing impeller on johnson outboard. Were changing the water pump impeller on my Evinrude outboard. This is how to inspect change the water pump impeller on an Evinrude or Johnson outboard. How to change impeller on my Johnson outboard A manual would be a real plus.
There are some tricks. The main problem that could occur would be the lower unit bolts snapping off. This will almost be a guarantee if the motor was run in salt water.
I would recommend soaking the boats in a penetrating oil before attempting to remove them. Changing the impeller on the Johnson 99-horsepower outboard is a straightforward affair that ensures your motors cooling system will remain healthy. The impeller is the heart of the cooling system moving the water from the cooling water inlets throughout the cooling galleries of the motors powerhead where the heat from the motors operation is transferred to the water.
Water Pump Impeller Replacement on 1980s and 1990s Johnson Evinrude Outboards. Below are step-by-step instructions on how to remove and replace your Johnson Evinrude outboards lower unit from the 1980s through 1990s. These instructions go with the following three-part video series.
Remove the Johnson lower unit from the boat. Remove the water pumps mounting bolts. Remove the O-ring from the drive shaft.
Remove the water pump case. Check for sand dirt and debris in the power head and flush it out if necessary. Use a screwdriver to remove the impeller.
Note the position of the plastic key then remove and replace it. The impeller rides on the drive shaft and draws water in then pumps it up to circulate around the block and head. Inspecting and replacing your impeller is a regular maintenance task for any outboard motor.
Impellers wear faster in gritty or sandy conditions. When an impeller fails completely it can cause an engine to overheat very quickly. Water Pump Kit for Johnson Evinrude Outboard.
Of course your motors impeller needs to be changed regularly but its also a good idea to replace other components of your water pump to maintain proper engine cooling. Water pump kit contents vary so please take a look at the categories below and check the content of the kit you order. 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. Press in new impeller housing base seal from the seal kit using a rubber mallet and a ratchet extension and the appropriate size socket Step 2. Press in new gear hub bearing seal from the seal kit using a rubber mallet and a ratchet extension and the appropriate size socket.
Rebuilding a Johnson 6HP Outboard Water Pump. Install the new impeller housing plate included in the water pump repair kit making sure the small tab on the plate is pointing upward. Install the new water pump gasket included in the kit and tap the.
Remove the 4 screws 5 and the nut or bolt at the rear of the gearcase. Then on the stbd. Side of the exhaust housing there is a small oval plate with 2 screws remove the cover and remove screw 6 in the coupler 8.
The lower unit will drop down remove the pump housing 14 replace impeller and any other worn parts. Post back with questions. To replace the water pump impeller on most all outboard motors you have to remove the lower leg of the outboard.
The size and weight of the lower leg is proportionate to the horsepower so with a 90-HP engine you are about at the limit of the weight that an average guy can handle by himself. Once that is done Ill pull the lower unit and replace the impeller and other water pump components. Replacing an outboard thermostat can usually be done right on the engine.
Its a simple matter of removing the cylinder head cover. This will give you access to the outboard thermostat as well as the pressure relief valve. Slide the impeller pump housing down the drive shaft and secure it.
Using the wrench with the bolts or nuts. Reinstall the lower drive unit to the outboard to complete the project. Trim the outboard all the way up if you have the boat on a trailer out of the water.
Outboard Motor Water Pump Impeller Replacement Guide Video Transcript The serial number on the engine were going to be working on today is 0T147002. If we take a look at the application charts that we provide in the Sierra catalog were going to be using Sierra part number 18-3319.