water pump impeller

[james]

Howdy all!


Last time I was out the tell tell stop peeing and I don't know the condition of the impeller since I bought her used , sorry "pre-owned".

The question is, I am somewhat mechanically inclined, should I attempt to change this or is this best left to a professional

It is a 2000 yamaha 80.

also what id the price range I should expect if I pay to have it done.


Thanks

James

[Captains Cat]

James, not a hard job but involves dropping the lower unit to get at the water pump. I've done it on Hondas but not on your engine.

Is the engine overheating? If it isn't, it's probably just a plugged telltale. Take the cowling off and remove the little rubber hose from the inside, where it goes through the cowl and comes out so you can see the "stream". This sometimes has an insect crawl up in it or otherwise gets plugged. I keep a short length of coat hanger on board for the purpose of cleaning these out. I've lost the stream quite a few times (on my engines, smart alecs) but never had an engine overheat. I know then that's it's just a telltale problem.

Let us know what happens.

Charlie

[C-WEED]

Before you tear it clear down. Start by checking from the pee hole back for a blockage. You should see a few connections inside the cowling. You should be able to disconnect the pee fitting for better flush access. Flex the rubber tubes to loosen any crusted stuff. Use a peice of wire to probe. Use a little air pressure or water pressure and blow back thru the system from the hole. Then hookup the water hose/muffs for a test.

Muddobers, sand, salt, c-weed, grass/algea can plug'em up and it doesn't take much.

If you get lucky, you'll find a blockage.

[Anne-B]

James

The pee hole could be blocked with crud. Get a piece of weedwacker line and push it up the pee hole.

Doug

[james]

Thanks all for the quick replys!

When I got home I hook the muffs to check it out, it did flow out then. Then I thought maybe because of the pressure from the hose might of made a difference.

And no it did not seem to be overheating when I was bringing her back to the ramp.

I guess best thing to do is take her out and see if she starts peeing.


James

[james]

Heres another question,
how often should a person change the impeller?


James

[Adeline]

[Adeline]

Here's a video. http://www.themarinedoctor.com/cgi-bin/YaBB.pl?board=Cot;action=display;num=1113876330

[digger]

The job is pretty easy. Make sure you have the control in neutral. There are the visible bolts on the lower unit, and then the hidden ones under the adjustable trim anode near the back. The anode comes off by taking off the rubber cover on the top of the rear of the casing above the prop. Then there is another bolt you need to take off accessible from where the anode sits. It then slides off. The pump housing comes loose with 4 bolts (I think), and that gives access to the impeller. I'd check the seals below the pump to insure they are still setting correctly (freezing displaced mine one time). When you put the new impeller in make sure to lube it a bit and flex the blades so they tilt backwards in respect to the motor rotation. When reassembling, make sure all bolts, shafts etc are lubed so that they will not cease prior to doing this the next time. be careful that the shift rod alignes when you reassemble, cause you can assemble it slightly cocked, and you won't have the lower unit shift at all if that is missed( guess how I know). A shop probably would charge 1 1/2 to 2 hours for the job, plus up to $100 parts, depending on the pump housing condition. Usually they want to put in new gaskets on the pump, but mine have been just fine if you are careful disassembling. Good luck. Digger on Snoopy-C

[james]

Thanks again everyone for your replies.
Always a big help.



James

[thataway]

If you have a mechanic do the job, try and watch. Not only so you can do it next time, but occasionally an impellor gets fried when underway--some distance from mechanical help. Always carry an extra impellor. Trash, plastic bags, etc can plug the intake and cause the impeller to heat up and then fail.

[james]

Unfortunately, I cannot locate a engine manual(west marine is out of stock,whats new)! and I want to get the impeller changed by this weekend.
I have one question though, do I need to disconnect the shift rod on the yamaha 80 2000, and if yes what do I look for.

Thanks,

James

[K7MXE]

Just another note on this. I am speaking from the inboard motor
point of view but think its the same with a outboard.
Never turn the motor with the prop. Use neutral if you have to
move the prop or pull the impeller first. You can damage
the fins of the impeller real fast if they get turned the wrong way.
Been there and done that but just once.
Bob Heselberg Eatonville Wa

[digger]

The shift rod has splines, so it just slides apart as the lower unit is separated. Like I said in the earlier post, make sure that your carefully realign it when putting back together. It will go together without the shift rod aligned, and you'll have no shifting if you do that. Ron

[james]

Thanks for the help!


James