My 1st Water Pump Repair Report

[cdnfthree2]

Just thought I'd make a record of what I experienced yesterday when I dropped a lower for the first time on my 1991 150hp Johnson.

1. Those bolts were alot easier to get out that I feared they'd be.

2. I now believe all those adhesives called for by Johnson are a waste of time and money.
The only part that needed any adhesive was the uniquely odd shaped o- ring type rubber seal between the pump housing and the plate. I used stickum for ease of installation only. The rest of the parts wouldn't be water or air tight regardless of how much adhesive you used. --there was a hole in the housing for what i believe to be venting anyway.

3. If they'd built this thing with a little more room between the cowl and the carbs, it would have made unhooking the shifting lingage a hell of alot easier. I must of had to move the shifter six or seven times before it was all over.

4. Almost forgot why I posted this-- The old impeller was over ten years old and looked great so I saved it for next time. Weird huh. Even after all those foolish dry starts before enetering the launching lane .

Anyways, It works fine so I'm happy. I alsowanted to change my solenoid while I had it in the yard but It looked like I would of had to remove the lower cowl too in ordr to access the bolts to it's harness. Is this true?

 

[james williams]

Re: My 1st Water Pump Repair Report

#5 you should have put in a new water pump while it was apart.

 

[crb478]

Re: My 1st Water Pump Repair Report

#4. Throw the old impeller away or just keep it for emergencies incase the new one falls apart while you are out on the water. If it is 10 years old it is not to be trusted.

 

[cdnfthree2]

Re: My 1st Water Pump Repair Report

#5 you should have put in a new water pump while it was apart.

I did this. Bought the entire water pump repair kit and installed it.

I seriously doubt anyone would would try to change an impeller on the water on a 150.

 

[james williams]

Re: My 1st Water Pump Repair Report

#4. Throw the old impeller away or just keep it for emergencies incase the new one falls apart while you are out on the water. If it is 10 years old it is not to be trusted.

My motor was eleven years young.I put a new one in.The old one had more pressure, by the gauge,than the new one.I keep the old one {{{for rough times ahead}}}}.

 

[fixmyevinrude]

Re: My 1st Water Pump Repair Report

I also use to do those foolish dry starts at the ramp and although I never had a motor failure I never do them now. My impeller also looked great I thought and I also saved mine.

Here is what I found upon careful and close inspection.

1) Where the blades make contact with the housing liner they were actually glazed, worn and burnished. (Probably from those dry starts) They also had tiny cracks in them.

2) I poked the blades tips with a sharp pick and they were not soft, supple and elastic like the new one. In fact as you poked toward the center of the old impeller it was noticeably softer than the tips. (Probably again from the dry starts) I am guessing that this is why some impellers blades break off. They simply loose their elasticity from heat caused by friction.

I would be curious if you find similar results. If you have time check yours out and report back. Happy Boating.

 

[cdnfthree2]

Re: My 1st Water Pump Repair Report

Well, I checked it out and it looks as if new. No visible wear, cracks, etc, whatsoever. I say it is over ten yearts old because it sat for 10 years before I got based on the expired registration. I used it only over the last summer. It is a possibility that it was changed before the previous owner tossed the whole rig to the side and let it sit. The old housing was plastic just like the new one. It even still had the tiny ridges from the mold on the tips of the blades. After ten years though, better safe than sorry.

 

[fixmyevinrude]

Re: My 1st Water Pump Repair Report

Well I guess that blows my theory. But as you said. Better safe than sorry. Thanks for reporting back.