How do you replace the impeller on a Honda 90?

From the guy who started this thread, I wanted to thank everyone who posted.

Long story short - when I got the pump housing open the impeller was "fried" to the inside - check the photo in my album - so I needed to buy a new housing.

On Saturday afternoon I took a 45 minute road trip to the only Honda dealer who had the rebuild kit in stock - cost $130. Thanks to the great photos I had the job finished by noon Sunday.

The "Retriever" now sits in her slip ready to go for the holiday weekend.

Thanks again :D
Phil
 
the impeller was "fried
Click to expand...
I'd say fricaseed. That impeller was toast. A confession; I put off servicing my water-pump because I was fearful that the procedure was beyond my skill set. I finally did it because I read that the gearcase-bolts could become frozen and break(when removed) if left too long. Thankfully, it turned out my impellers and bolts were ok and the job wasn't as difficult as I feared. To all those on the fence I say go for it. Nobody is going to be as careful and meticulous as you are.
 
The first time I got into a lower unit was because the rear shaft seal on my older Johnson had been cut with wraped up and melted fishing line.

Discovered with the gearcase apart that I needed shift dogs, too. Not that difficult at all. Included the water pump in the operation, etc.

The factory Service Manual is a great help when you need it!

Try it, you'll like it!

Joe.
 
Some resurrection of an old thread.

Looking at the photo's Alma's Only posted, I'm seeing the 5 nylock nuts that will be removed, and I'm also seeing the lock nut and adjusting nut on the shift shaft.

If the adjuster and lock nuts are exposed, and dealt with, and the five nylocks removed, will the bottom slip down and off, and expose the water pump housing?

The rest looks like pretty straight forward wrenching.

Do I even need to mess with the shift rod???
 
Here is a link to the manual for honda 90 impeller change.

http://www.marineengine.com/boat-forum/ ... eplacement.

Here is the kit, that can be purchased on amazon

Sierra International 18-3283 Marine Water Pump Service Kit for Honda Outboard Motor

I changed mine a few months ago, not a big deal. I would not pay someone to do it. It took me several hours to find these two things, so now you are ahead of the game!

Dan McP
 
shellndanm":2kvrsnr1 said:
Here is a link to the manual for honda 90 impeller change.

http://www.marineengine.com/boat-forum/ ... eplacement.

Here is the kit, that can be purchased on amazon

Sierra International 18-3283 Marine Water Pump Service Kit for Honda Outboard Motor

I changed mine a few months ago, not a big deal. I would not pay someone to do it. It took me several hours to find these two things, so now you are ahead of the game!


Dan McP
Click to expand...

Thanks Dan :D

That manual link, is what I was hoping for. Thankyou, thankyou, thankyoi.
I picked up new impellers, gaskets and orings several years back, to have in my just in case box, so I'm good to go here. Thanks a bunch.
:D
 
A great series, of both photos by Alma's Only, and the links. Although I carry a shop manual aboard, this is a good reminder, to pick up a water pump kit, just in case if you are going on a long trip.
 
I have not changed a big Honda, but I have changed several smaller outboard impellors.
I find that dealing with the shift linkage is the hardest part. Just unding ang redoing the shift connection is different on all the motors I have done.
Some have a little rubber plug in the arm that allows you to just loosen a bolt and then things just slide apart.

Jerry C22 C Nile
 
So, 2003 Honda 90's

There is no shift linkage to disconnect. on this motor. You don't have to remove the trim tab to access the 5th bolt(nut in this case).

There are 5 -14mm nuts and washers that need to be removed.
The lower part with the impeller housing is then separated.

This was a bit of a fight, although it just took some time. The longest bolt that the lower slips off of, is at the back near the trim tab, and it had developed a close relationship with the lower unit. It required some patience and some work, and some penetrating oil, as well as a judicious application of a dead blow hammer and wide thin paint scraper to get it started, and it did it's best to resist all the way.
This is aluminum, so don't use a screwdriver to pry with. The heavy duty paint scraper I used, had a 5 inch wide blade, was thin, and worked great.
I intend to use some anti seize, on the studs when I put this back together, to prevent a repeat of this close association.

..but I won.

The other 4 bolts didn't offer any resistance, but they were about 1/4 the length of the one at the back.

When it comes loose, it is simply pulled straight out. The drive shaft is about 30 inches long, so it needs room to get it out. The shifter, is just a rod sticking up with teeth on the end, as is shown in the link above provided by "shellndanm" for the later model 90's.

The rest is pretty straight forward.
4 bolts are removed that hold the housing around the impeller. It is worked loose, and lifted up off the shaft(There is an Oring under the housing that gets replaced, that seals to the plate under the impeller)
Then the impeller.
Then the key is removed(It just sits in a flat spot on the shaft. The impeller can only go on one way).
Then a plate below the impeller, and there is a gasket under that, that gets replaced, and was in the kit.
There was a second gasket that is below a plate under the first gasket that was not in the kit, that I had to go and get. Apparently, this one isn't supposed to need replaced, but it was the first one to let go when I was working my way down.

Assembly is in reverse order, using grease where the manuals says to. Use the proper torque where recommended in the manual.

The impeller I removed was not damaged, but its fins/blades, are permanently in a nice neat curl, were they won't push water any more.
The housing looked good, with no wear marks that would cause problems, but they do sell a kit, that includes the housing as well.
 
Nice job. The process of boat repair can be so stressful. But it is nice to know that you can fix your own boat! Plus I like being on the boat anyway, even for repairs.
 
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