I have a fairly new 115 Yamaha 4 stroke. It has the engine flushing attachment up by the cowling. When you hook that up and turn the water on, is it supposed to pee out that small hole in the upper part of the engine? Mine doesn’t, just has water coming out the lower ports. I’ve been hooking it up to the muffs just to be sure it’s getting a good flush. I’m wondering if I have low water pressure at the house or if that attachment just isn’t working properly. Owners manual isn’t clear if water should be coming out that upper small “pee hole”.
It should pee like it does while running! Does it pee on the muffs? Check the pee hole, you may have a mud daubers nest in there! Had it happen to my F225! You aren’t supposed to run the motor when you flush it from the cowl fitting, just run water through it!
mine seems to flush better with a threaded hose nozzle.
Marsha
22 Sea Hunt
It pees fine while in the water. I don’t run the motor when it’s hooked up to the hose attachment. It pees if it’s on the muffs too, just not when on the hose attachment.
Do you have good water pressure from the house?
SeaPro 220CC
Dixie Craft-custom flats boat
That’s what I’m not sure about. I suspect I don’t have good water pressure. Live in West Ashley.
When you connect the hose to the attachment on the Yamaha, you are bypassing the pee hole. That hose is what supplies the pee hole and when disconnect d you are flushing engine in a reverse flow.
My F225/F70 and F25, all pee when on the hose connection! The 225 takes awhile to fill the motor up and then starts peeing. You can hear it fill like a big bucket. Then it starts.
Don’t know about how the rest of yall feel but I don’t trust using
muffs and hose from house to flush motor. Too much house pressure
will make motor “look” like all is well, not enough leaves me wondering. I settled my own doubts , went to farm supply and bought
small size oval shaped livestock water trough , you can run motor and verify all water flows naturally. Also a non contact thermo gun will
let you see actual temp variables as motor runs , Watch tank temp,
cause motor will heat tank water if run for extended time.
Next best is put in fresh water lake and run short “or long” trip!!!
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My offshore fishing partner keeps his 27 Pursuit on a lift in a saltwater canal in FL. Twin 200 Yamahas. We lift the boat out of the water and hook the hose to the flush fittings and crank them and let them run awhile. They pee out the tube and never overheat. Been doing it for about 8 years and 2,000 hours. No problems yet.
Capt. Larry Teuton
Swamp Worshiper
gail wins, I have the same stock tank sometimes I use it a sometimes not! Takes a lot of water to fill that thing up!
http://www.tractorsupply.com/tsc/product/rubbermaid-structural-■■■■■■■■■■-tanks-100-gal-capacity
Easy ; you got the same tank I’ve got 100gal. I got mine in back side
of boat shed and just back up to it , drop foot in and run, when finished raise it up pull forward then cover tank w/ plywood , only fill it 1-2x year .
[http://www.militaryappreciationday.org
When you see “Old Glory” waving in the breeze, know that it is the dying breaths of our fallen hero’s that makes it wave.
author unknown
Agree with Cracker Larry on running motor on hose attachment. Have f250 yammie and run motor at idle for 5 mins when pulled up on jet float been doing it for 9 years and never overheated. figure it gets water everywhere it should go, also use Salt away attachment and have been amazed at lack of build up in water jackets.
I checked the water pressure at the hose - about 45 psi, which is pretty normal from what I understand. Unless I’m really misreading it, the Yamaha manual says do not run the motor with the hose attachment. I googled my original question, and there are dozens of posts about it with no clear answer! The manual itself isn’t exactly clear either. It shows both the hose attachment way and the muffs way, but it doesn’t state if the motor should be peeing when using the hose. I was just concerned because it used to pee with the hose attachment but doesn’t anymore.
quote:
Originally posted by OccamsRaiserI checked the water pressure at the hose - about 45 psi, which is pretty normal from what I understand. Unless I’m really misreading it, the Yamaha manual says do not run the motor with the hose attachment. I googled my original question, and there are dozens of posts about it with no clear answer! The manual itself isn’t exactly clear either. It shows both the hose attachment way and the muffs way, but it doesn’t state if the motor should be peeing when using the hose. I was just concerned because it used to pee with the hose attachment but doesn’t anymore.
The info I get from everyone is “Don’t run the motor when the hose attachment is hooked up”… I bought my boat from my neighbor who bought it almost new and ran the motor on the hose attachment for almost 15 yrs without a problem. I started using a drum to run it in because muffs wouldn’t supply enough water to keep it from overheating. Honestly, I would like to know why it shouldn’t be run on the attachment and what is supposed to happen if you do because if nothing has happened in 15 years, will it?
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If you run a Yamaha, on the cowling hose attachment you’ll burn up the impeller and water pump! Remember, you’re just flushing the motor! The impeller is made to suck in and supply water to the water pump. The impeller is made out of plastic and will burn up in a minute or less, if not supplied with water! The shape of the water intake on the Yamaha will not except muffs very well and it will leak outside the motor! Hence, a burnt impeller! Ask me how I know 
quote:
Originally posted by EasyIf you run a Yamaha, on the cowling hose attachment you’ll burn up the impeller and water pump! Remember, you’re just flushing the motor! The impeller is made to suck in and supply water to the water pump. The impeller is made out of plastic and will burn up in a minute or less, if not supplied with water! The shape of the water intake on the Yamaha will not except muffs very well and it will leak outside the motor! Hence, a burnt impeller! Ask me how I know
That make sense, but apparently only a possibility and not a definate outcome. The motor I have now was run on the hose attachment for 15 years and is on the original water pump according to him. When I bought it and found out the pump had never been changed, I bought a new one and just havent gotten around to replacing it, but hope to get it done soon so I dont get out there and it stop pumping.
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Let’s say that the water pump is designed ‘pump’ water UP from the lower unit through the motor. The hose attachment uses pressure to ‘pump’ water through the motor and DOWN to the lower unit where it can exit. What good can come from running the motor while on the hose attachment up top? Wouldn’t the water running down be forced up by the pump causing back pressure of hot water?
quote:
Originally posted by Mixed Nutz
It’s in pretty good shape for the shape it’s in!
The water wouldn’t be forced up at all, because the impeller would have nothing the draw on! The impeller is the key, to the pump!