water pump impeller replacement

[gain11]

I bought an impeller for my 74 Johnson 9.9 model<br />10e74g. My local boat mechanic said I didn't need to change any gaskets or seals really but he said this was not an easy job. Something about the shift coupler messing up some threads if i didn't do it just right. I offered to let him do it but he couldn't get to it. I am pretty mechanically inclined but I wonder is there something I shoud do or know before I screw something up. i really want to use the motor this weekend and I'm off work today so I have time to fix it. should I leave this to a pro?

 

[CATransplant]

Re: water pump impeller replacement

Bottom line is that if you don't have a manual for your motor, I wouldn't try to do the job for this weekend. Your local library may have a Seloc manual which covers your engine.<br /><br />It's not a terribly difficult job, but you'll want the guidance only a manual can give you.

 

[gain11]

Re: water pump impeller replacement

well went to the library and found some info on 69 but it looks very similar to mine. I have a clymer manual up to 72 but that manual is pretty vague. i see the shift rod coupler he was referring to but the manual doesn't say anything special about removing it oh well I guess I'll give it a try any last words?!!

 

[CATransplant]

Re: water pump impeller replacement

I haven't worked on that engine, so I can't be much help at guiding you, I'm afraid. The shift rod coupler, though, is just a little tricky, but not too much.<br /><br />The shift rod has a groove where it goes into the coupling. That groove has to line up with the bolt hole. That sets the length of the shift rod and the bolt in the groove holds the rod in position.<br /><br />The most common mistake is having the rod not fully inserted when tightening the bolt. It will be the wrong length, then, and won't hold. When it slips out, you'll be unable to shift properly.<br /><br />I know...that happened to me.

 

[umblecumbuz]

Re: water pump impeller replacement

Hi gain11,<br /><br />If you're mechanically inclined as you say, the job is straightforward, even without a manual.<br /><br />The guidance in the 69 library and your clymer manual for 72 is close enough to help.<br /><br />Just take careful note as you drop the leg, and you should have no problems. First time I did this job, I knew nothing and didn't have access to a manual, and I got it figured ok.<br /><br />Go for it, and post results.

 

[gain11]

Re: water pump impeller replacement

thanks for your help and encouragement. I think I'll try it, I always do. Let you know later.

 

[gain11]

Re: water pump impeller replacement

well it's doesn't seem too hard but i've run into a snag. I can't seem to get to the shift coupler on once I get it lined up.the lower rod in the gear cas has a bend in it, it is supposed to be bent? all the way down is forward right? I don't suppose there is a trick to doing this because I've been trying for half an hour.

 

[CalicoKid]

Re: water pump impeller replacement

I did that on my seahorse ten (1959) a couple of years ago. Had the shift rod fall apart on me as far as I could get from the landing. I think down is reverse because I remember only having reverse after the rod fell out. Maybe our motors are too different to compare but I did have to do a lot of wiggling to get everything back together... both times. Try turning the prop, maybe curse at it, if you need some good swearwords I can email them to you.

 

[Solittle]

Re: water pump impeller replacement

Don't turn the rod. It is the shift rod and the length is important.<br /><br />Take the coupler that you are having a problem with off of the engine. Then spread the coupler a tad with a screwdriver. This is to give it more room to fit over the shift rod. Still with it off check the threads at both ends and if they are not too bad insert the bolts and screw them in and out. Fit the coupler back on the shift rod. If it is still tight take it off again and spread it a tad more. When it fits OK tighten one of the bolts (I think the lower one). Be careful not to strip the threads in the coupler by over tightening. Now reinsert the lower unit and fir the other end of the coupler into the shift rod and tighten as you did with the other end. If the threads of the coupler are stripped you have no choice but to buy a new one. They are readily available at anyplace that has a decent supply of OMC parts.<br /><br />I have a 1975 (basically the same as yours) 9.9 and had the same problem a couple of months ago. My coupler was shot and I had to replace it.

 

[gain11]

Re: water pump impeller replacement

the coupler seems to fit over the rods ok but the problem i have for some reason no matter what posistion (or gear) i'm in, I can't get to the bolt. if I put the lower rod in forward posistion, the coupler nut is an inch below the gearhousing wall so i can't get to it to tighten. if i place the coupler on the lower rod first then the housings are almost closed before the coupler reaches the upper rod. i even loosen the little plate on the shift selector up top in order to push the rod down a little more in forward, no help. is it possible that the lower rod can move down past it's original posistion? i know i'm wearing this out but the manuals don't help. anyway thanks for everybody's help!!

 

[mmmarnie]

Re: water pump impeller replacement

We have a '59 evinrude 50 hp and we too had the whole impeller replacement fiasco! We now have the original copy of the motor and now we see a bit more clearly. If you would like a scanned copy of what we have let me know. It is a 1959 not the same year. Maybe the same process? Don't know I am a new owner repair person myself...GRIN

 

[gain11]

Re: water pump impeller replacement

Originally posted by Marnie McLaughlin:<br /> We have a '59 evinrude 50 hp and we too had the whole impeller replacement fiasco! We now have the original copy of the motor and now we see a bit more clearly. If you would like a scanned copy of what we have let me know. It is a 1959 not the same year. Maybe the same process? Don't know I am a new owner repair person myself...GRIN

 

[gain11]

Re: water pump impeller replacement

sorry I hit the quote button by accident, yes I would like to see that Marnie, thanks!<br /><br />here's my e-mail: loosbloos44@wmconnect.com

 

[gain11]

Re: water pump impeller replacement

just wondering about these shift rods. they are not in the same posistion as when i pulled the gearcase. i remember that it didn't seem to shift all the way forward before i took it apart. (i've never had this motor on a boat, just got it from a friend.)i wonder if these rods are bent. the top rod has a bend at about the last inch and the lower rod bends about 2 to 3 inches down are they supposed to be that way? could i pull the shift rod all the way out from top? thanks!!

 

[CalicoKid]

Re: water pump impeller replacement

Are there any adjustments? Sounds like it's out of whack if it didn't work right before you took it apart. Bent? Maybe, I don't know what it's supposed to look like and can't remember if mine had bends in it or not no matter how hard I hit my head. I think you might need to look at a factory manual or exploded diagram. I've had the LU off so many differend motors here over the last couple of years they've all blended together in my memory, but I believe I've noticed shift rods having bends in order to clear the narrower passage in the leg. I'm of no help at all am I? Well, the offer stands on the swearwords, that's what I usually resort to..