Replacing the impeller on a 4hp Mercury outboard to fix the water pump Part 2

Replacing the impeller on a 4hp Mercury outboard to fix the water pump Part 2

This film is all about…. well its pretty much what the title suggests its going to be. I warn you now, this doesn’t come under the heading of fun, but it is stuff!

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FegansTaxidermy says:

Thanks so much you saved us!!!

Bob alloo says:

I'd been trying to get my 98 Merc 5 hp back together for several hours! I was ready to take sledge hammer to it when i came in to find out if anyone else had the same problem I was having. The drive shaft would go almost all the way, but would NOT go that last 2 inches! In your video, you take it back out and put it in reverse. I already had mine in reverse! Then I figured it out…and I'll bet you got it right just by accident. When you line the shift shaft up to that little clamp, it causes the drive shaft to run up into the housing OUTSIDE the tube that it's supposed to go up into. Of course, you can't SEE that that's what it's doing. But I noticed that when I turned the prop, I could feel that the end of the splined shaft was bumping against something. I THOUGHT it was the female splined receiver, but I was wrong. I figured this out by turning the flywheel. When I did, I felt no corresponding spline to spline bumping. So, to make a long story longer, I pulled it apart for the 20th time and THIS time, I managed, with a flashlight, to watch where the end of the drive shaft was heading as the shift shaft was nearing the clamp. The drive shaft was heading toward a void in the housing and NOT toward the tube that leads to the female splined receiver. I think you just got lucky and it went in on your second try. Anyway, maybe this will help some other frustrated person in the future. I'm glad I didn't take the sledge to it! thanks for the video.

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