• Water Pump on Honda Outboard

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Talk about your boats, trailers, and boating specific topics here. Sponsored by Life Proof Boats.
 #240687  by racfish
 Tue Mar 13, 2018 10:57 am
I called a few places around town to change out or do diagnostic checking and its very expensive. I called a couple Mobile Marine Places and that's really wow. The cooling pisser isn't spitting water out. My question is, How hard is it to change out the water pump? Do I really need to pay $165 and hour to get this done?

I just talked to the mechanic and he said its in the lower unit of the motor. I thought it was under the cowling. He said it would be at least 4 hours to fix. Yikes.
Last edited by racfish on Tue Mar 13, 2018 11:18 am, edited 1 time in total.
 #240690  by Amx
 Tue Mar 13, 2018 11:56 am
If it is the same as all the other outboards I've done, the shop shouldn't take any longer than 1 hour. I've done it in one hour. You'll have to get a repair manual to see what all is needed, tools, gaskets, pump body, plate, more gaskets as in multilayered gaskets with the plate. And of course the impeller. And the proper procedure. Remember, the bigger the motor, the heavier the lower unit.
 #240691  by BentRod
 Tue Mar 13, 2018 1:21 pm
The water pump (impeller) is typically located in the lower unit and is USUALLY not difficult to replace with a little mechanical skill. However, corrosion can make it a more difficult job, so if you're not confident in your abilities, then best left to someone else.
First though, are you sure the water pump is the problem? Sometimes the pee hole can get clogged with debris and can be cleared out with a long piece of wire or stiff plastic (like a zip tie) by pushing it back up the exit hole. A simple fix for seemingly complex problem. Usually when the pump starts to wear out then it isn't pushing sufficient water, but no water sounds more like a clog.
Last edited by BentRod on Tue Mar 13, 2018 1:30 pm, edited 1 time in total.
 #240692  by Amx
 Tue Mar 13, 2018 1:28 pm
Also in the spring that hole can get clogged by muddobber wasps. But I think it's a bit early for that, unless you haven't used the boat all winter.
 #240693  by Amx
 Tue Mar 13, 2018 1:30 pm
If the motor hasn't been run all winter, the rubber impeller fingers can stick to the housing, and when the motor is started the rubber fingers can tear off, the pump won't pump water without the rubber fingers. Check the output hole first, then the intake holes/slots, then the pump.
 #240695  by racfish
 Tue Mar 13, 2018 4:23 pm
One thing for sure is there were wasp nests under the cowling. I got rid of them but there was some mud here and there. I got a 32 gal garbage can to try. A friend said maybe the hose was hard enough. It has lower hours . I cant believe its the pump. I'm hoping for a clogged hole or line.Thanks for the input.
 #240696  by 4n6fisher
 Tue Mar 13, 2018 4:41 pm
Sounds like my older Honda 9.9 did, I dropped the lower unit (repair shop tried to scare me with corrosion potential, but no issue), pulled out all the little rubber bits that had accumulated everywhere and put the new impeller in. No problem and less than $20 (or would have been if I bought the right impeller the first time). There are a few kits out there that come with all the seals/gaskets needed, just make sure you get the right one. It can help to remove it first to get an idea of what you need new and what you can reuse.
 #240701  by stryker17
 Wed Mar 14, 2018 10:40 am
have done water pump on both mercury 4 stroke 90 ho and Yamaha 8.8 with no previous experience , no problem, however I did go to U tube and watched a video of both...just remember to make sure and get the impeller veins bent in the right direction......
 #240718  by racfish
 Thu Mar 15, 2018 5:27 pm
Give me a hammer and nails and I can build. Motors forget it. I'm all thumbs. My dad never taught me mechanic work. He was a builder. I'm gonna try a couple pointers and see if its a fixable thing for me. If not I'll just have to grin and bear it for the mechanic. I'll ask around more. Time for the Cowlitz anyways.
 #240719  by stryker17
 Thu Mar 15, 2018 5:46 pm
If you are around the Duval area I know a guy that can do it for you........he is a real good mechanic , works from home and does it at nights.....