Is this bad

Attachment 325270

My 90 hp Yamaha was not peeing real hard. I thought it needed tamsulosin but it turns out the impeller was cracked a bit. lol - some of you geezers may know what I'm talking about. I know I do!

Anyway, in my opinion, this little crack really should not have mattered that much. Either way, it’ll get replaced as soon as my amazon parts order gets delivered. Still weird though cause it really didn’t pee anything at idle, had to rev it up and then it would only trickle. Hopefully it works better with a new one.




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There may be a little piece of rubber stopping up the pee tube, or it may have a UTI. :D

If you have an air compressor, I'd blow a tiny puff of air in through the hole and see if anything comes out. Wait until a real boat mechanic chimes in on how much air pressure you can blow into the tube. There may be a check valve or something in the line but I don't think there is.

Dirt dobber wasps have kept marine mechanics in business for years. I would make 100% sure the outlet tube is totally clear.

BTW, if I saw my water outlet not “peeing” at low rpm it would be in my shop immediately. Much cheaper to spend a few bucks for an impeller and the gaskets than to replace a scorched power head.


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Yep! Lost a motor to dirt dobber's before myself. I had replaced the water pump the year before and didn't even think to check the weep hole to see if water was coming out. After about a 100 yards are so up the river I smelt something getting hot but too late. Learned my lesson now I always check to see the tale tale water coming from the motor when I crank her up.

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Originally Posted by Slab

Attachment 325270

My 90 hp Yamaha was not peeing real hard. I thought it needed tamsulosin but it turns out the impeller was cracked a bit. lol - some of you geezers may know what I'm talking about. I know I do!

Anyway, in my opinion, this little crack really should not have mattered that much. Either way, it’ll get replaced as soon as my amazon parts order gets delivered. Still weird though cause it really didn’t pee anything at idle, had to rev it up and then it would only trickle. Hopefully it works better with a new one.




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Well there's your problem. New impeller will fix it right up. Even if not cracked that one should not be reused, as it has taken a set and the fingers may not be contacting the housing anymore.

A little shot of air down the pee hole will ensure that the water passage is clear of any rubber pieces.

An impeller should be considered preventative maintenance, change them every couple years even if they're working fine. Could save you a lot of money and frustration.

If it's a newer Yamaha, flush out the system with the built in flush valve.

Slab

Yep
that can cause a lot of headaches if not caught in time

Also as guys have mentioned is clearing the pee hole

A little insurance I usually recommend in our area from
preventing those pesky mud bees plugging up that hole
Is I usually carry a few twist ties for inserts
if exposed to the outdoors for a number of days
the twist tie doesn't need to be pushed in very far
just enough to prevent any bugs or bees laying
their eggs plugging the hole
being a loose fit should blow out the tie should you
forget to remove it
Hope this helps

billygee

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Originally Posted by tlefire

If it's a newer Yamaha, flush out the system with the built in flush valve.

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New to me! lol - anyway, it's a 2007 90 TLR Yamaha 2 Stroke

Keep a piece of weed eater string in your boat to ream out the pee hole, when needed.

A friend in TN used to deal with dauber too often. He whittled a small piece of dowel to fit in loosely but snug enough to stay. Drilled a hole in the other end and added a piece of nylon string that was tied off close by to catch it when the motor fired up, and held it ready to be used when he got home. Best solution I’ve ever seen for this.

You caught the impeller just in time. Everyone’s advice is sound. I hope you looked at which way it turns for the reinstall. You’ve probably done them before. Is the housing OK? Salt and sand can do in the housing. Your impeller doesn’t look terrible though it had failed. If you look and find tiny chips missing be very diligent in making sure there aren’t any blockages. Good thing we didn’t use it Tuesday.

Yep, I’d say ya need a new motor. Let me know where ya throw this one away! Better yet, just call me and I will haul it off for you! :biggrin

In the Summer, I put a pipe cleaner in the pee hole for the Daubers. Have had this problem several years ago when I learned what they were doing. Just don't forget to take it out before you get to the water. jmo.

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Originally Posted by broharrell

Keep a piece of weed eater string in your boat to ream out the pee hole, when needed.

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Also a piece of duct tape over the pee hole during slack times will help .

For the mud bees:
Tell your work/boss/wife that you need to leave 2 hrs early everyday to use it! I can write you a note and sign it, although I have -0- credentials, if you think this scheme would fix the problem.


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LOL! Yep....can't beat that ole' Tamsulosin! :) Anyway, I use to replace my water pump (impeller) every two years when I was running full out through the seasons. And that one you show there definitely NEEDS to be replaced. Don't take any chances. You will just not notice when it all of a sudden stops peeing. That will cost you a new engine!

I love the idea of the weed wacker string for clearing out the tube! Had to use a high pressure air hose on my little 8 hp this fall before firing it up. The wasps just totally blocked the tube.

Just FYI, I replaced a bad impeller on my 40HP Yamaha and it still would not pee. The weep hole was clear, so I took it to my shop. He said little chunks of the rubber from the vanes had gotten lodged in the water passages. Took him about 2 hours to finally get all that out and get it peeing again.
Flomax didn't work either, by the way!

After installing your new parts be sure to shoot compressed into the pee hole! Now if only that would solve my problem too, this old geezer recognizes an impeller and understands the Tamulosin reference. Not to mention Avodart.

It'll buff out. No sweat!

tis only a flesh wound …..:Rofl
I have a rule when I get on any boat with a motor that was taught to me as a kid ….
when the motor fires up if it aint peeing pretty quick and good best not go ….

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Originally Posted by Atimm693

Well there's your problem. New impeller will fix it right up. Even if not cracked that one should not be reused, as it has taken a set and the fingers may not be contacting the housing anymore.

A little shot of air down the pee hole will ensure that the water passage is clear of any rubber pieces.

An impeller should be considered preventative maintenance, change them every couple years even if they're working fine. Could save you a lot of money and frustration.

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This right here. I change mine out every 2 years when I fished salt water every year . Cheap maintenance

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Not meant as upping the ante but I use my boat often enough nothing gets into it but I also change the impeller each year when I service the boat with new plugs, lubes, etc.


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I keep a supply of them latex finger covers. I just roll one on when I park the boat. If I forget it, it will just blow off. I have used balloons also. Small mechanics wire will clean out your tube also.

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