pascal50
08.06.2021 4:49:25
Re: New Water Pump - Still not pumping water [links]
See full version: New Water Pump - Still not pumping water
Re: New Water Pump - Still not pumping water [links]
Hello - I much appreciate your help.
Here is what I have done so far on my 1984 Evinrude - Model E35ELCSM - 35 hp.
In the past I have always put earmuffs with a garden hose with full pressure and started the motor prior to putting it in the water. It had always peed water out of the bottom of the motor.
Last year, when I tested it, it did not pee, so I assumed that the water pump impeller had deterioriated. I installed a new water pump kit including a new housing, impeller, all the various gaskets, o-rings, etc. as per the instructions. All appeared to go fine with the installation; however, I did have a little trouble hooking up the rubber hose to the copper line. I finally did get it lined up and secured.
Then I did what I normally do with the muffs and garden hose; however, it did not pee as it had before. I did not want to keep it running and get the engine hot so I only had it running about 2 or 3 minutes with no luck on it pumping water. I do have the intake fins in the proper position. I also cleaned out the hose from the pee hole to where it connects onto the engine with compressed air and it blew clean - no obstruction.
That's what I have done so far.
Re: New Water Pump - Still not pumping water
Well it sounds like you've checked most of the simple things.
A couple of possibilities that come to mind are 1: The key for the impeller fell out or became displaced during install. 2: the metal tube that goes into the pump housing became displaced at the powerhead end. 3: there is a blockage in the powerhead. (Was the old impeller intact?)
Try removing the tell tale hose completely and see if water comes out of the fitting on the powerhead. I had one blocked with crud at this fitting once. If it still doesn't flow I'd pull the lower unit back off and put the garden hose directly on the metal tube at full power and see if it flows all the way through the motor. also check the impeller key since you have it apart.
Hopefully its an easy fix.
Pull down the gearcase and attach the hose directly to the water tube.
Slowly put on pressure.
Water should come almost immediately to the pee hose.
Increase pressure (above 20PSI), the thermostat should be pushed back and water flow out the exhaust.
The 50 horsepower (HP) Johnson is an outboard motor sized for medium- to larger-sized boats. The fuel pump on the outboard is responsible for pumping fuel from the gas tank to the carburetor, which in turn powers the boat and enables it to accelerate when the throttle is increased. If the Johnson sputters while it is running at higher speeds, it could mean that the fuel pump is going bad. There are some ways to determine this for certain.
Turn on the air compressor and blow out the line with a hand-held air attachment.
Turn the engine off and unlatch the Johnson engine cover. Remove it and set it aside.
Before you can start the installation process, you've got to remove the defunct water pump.
If the time has come to replace your boat's water pump, you might want to know how to install a new one on your own. A few different Johnson water pumps run with 50 horsepower, including the 1958-59, 1971-75, 1979-88 and 1989-2005 models, as well as some of the three-cylinder models.
Gasket retaining compound
Pump hosing, about 3 inches
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New impeller, about 3 5/8 inches
Here's how to replace a Johnson 50 HP water pump:
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