water impeller no water

[petewv]

Re: water impeller no water

I looked at it , there is a small 1/32 “ hole there, I think it is a vent , i used a small wire and it went up into the hole a couple inches. I need to put it back together. I also need to get a new fuel line before I try to start it.

 

[LongLine]

Re: water impeller no water

Last year I had a no-water problem with my 110. I replaced the entire water pump & all tubes & seals. Went back together real easy but still no water. Worried about blockage, I took side plate off then saw tube wasn't set right into the fitting in the block.

Called my son and had him guide it in with a bent piece of wire. Goes like a race horse now. I'm sure there's a trick to it for a one man job, but I don't know what that trick is.



Tom B.
(LongLine)

 

[LongLine]

Re: water impeller no water

Also with that side plate off, you should see a 'protrusion" that I've labeled "B" in this pic.

I used a straw and blew smoke thru the port labeled "A" and some of it came out "B". Hence there is a small hole there that lets some water into the exhaust. Chances are the air you experienced came from this. i.e exhaust was blowing back out the water "pee" system.

Tom B.
(LongLine)

 

[sutor623]

Re: water impeller no water

Chances are the air you experienced came from this. i.e exhaust was blowing back out the water "pee" system.
(LongLine)

Yeah that seems to be what these little motor do when the water flow is an issue, blow exhaust through the telltale. Good photos man, and this seems very feasible as to what Pete may be experiencing.

BTW thanks Pete for the pointer. Once I got the driveshaft to line up nicely, everything went right together. I did not have an issue getting the shift shaft together like you did though.....

 

[petewv]

Re: water impeller no water

I put the lower unit on the motor. The motor peed for about 2 minutes then water started to come out the small vent hole that is near the nut on the lower cowl then it stopped peeing . I am trying to take the exhaust plate off to see if there is something clogging the water passage. I have broken two on the bolts on the exhaust plate. My question is how do I get the last bolt out without breaking it? The bolt is on the bottom of the plate. I am soaking the bolt with PB Blaster. Would it be a good idea to heat the bolt with a torch? If I break the bolt I will have to take the motor off of the lower cowl to drill it out.

The motor was peeing so I would think the impeller was installed right.

 

[sutor623]

Re: water impeller no water

Is the water filling up the cowl? There is an elbow at the top of the motor where the tell tale is routed from, if you lose pressure there you will no longer pee. Sounds like the impeller is on right. PB the bolt, let it set. Dry off the surface of the bolt the next day and heat the bolt up, then let it cool off. This will make the bolt swell in the hole, and then shrink back down, which should loosen up some for ya. Just be easy, and I have used little taps with a hammer on the end of the wrench rather than putting high torque on the wrench work well. I like to use the air gun when I can on older bolts, just has a better chance of not breaking. But when you cant get to them with it, it becomes a different story.

 

[sutor623]

Re: water impeller no water

I also often pull the powerhead to allow access with the gun as well. Seems like it takes longer, but one snapped bolt and it becomes more of a chore than removing and reinstalling the powerhead. Here is my last snapped bolt shenaningan...

 

[petewv]

Re: water impeller no water

I have a small propane torch that plumbers use to sweet copper pipe with . the Coleman fuel is the same fuel that is used with a camping cook stove. Would that supply the heat that is necessary to loosen the bolt?

What is the best way to remove the snapped bolt? Is there a better way than a easy out?
pete
when i put my thumb over the pee hole (after it quit peeing )there was a lot of big air bubbles came out the prop . I think the lower cowl is open . does that mean the lower cowl is not felling up with water? the motor is in a 55 gal.water barrel.

pete

 

[iCam]

Re: water impeller no water

I had to remove some stuck bolts on a non-merc engine (never saw salt water), and all I had to do is tap-tap-tap. Don't force it, but it takes patience to loosen those. Eventually they all came out with the exception of 1 (1 of 26 bolts). Had to re-tap that one.

 

[crazyhunter]

Re: water impeller no water

hey i had the same problem with my 7.5 same year. i replaced the impeller and had it hooked to a hose and even bought a large trash can to put it in. the motor would never pee right. it would somtime pee for a minute or so then quit. i finally got mad at it and just put it on the boat and took it to the lake. i figured it would work or it would become a anchor. well i ran it and it peed a good stream the whole day so i took it home and put it back on the hose and it wouldnt pee for nothing. idk if thats the same with your motor but it could be.

 

[sutor623]

Re: water impeller no water

Pete there are a few ways. i dont have much luck with easy outs but some do. Best thing is a torch and visegrips. If that doesnt work, to the drill press she goes....

 

[ejbatenb]

Re: water impeller no water

Hey guys this thread is great. Exactly the same issue I'm having with my '67 3.9 merc. Here's what I've done, and still no water comes out the pee hole:

Replaced impeller that was shredded. It still wouldn't pee water, but it would spit a little bit until the engine started to get hot and then overheat.

Stuck a garden hose on the water pipe, solid stream shooting out the pee hole...so no blockage right?

Took the exhaust plate off the side and found a piece of old impeller inside the channel in the plate. Got it out and still no water out the pee hole.

Started it up with the "clean water flush" plug out and it shoots water out of that hole. Put the plug back in, no water out the pee hole.



So when I start it now it will shoot water out that hole by the powerhead bolt under the cowl for a bit. Then it starts to smoke A LOT and a steady stream of exhaust comes out of that hole and the pee hole. I noticed bubbles in the trash can coming up from the prop while it was running.

So I know it's pushing water up, but it just doesn't make it around to the pee hole. I let it idle for almost 10 minutes today and then revved it up in neutral and drive/reverse and it never overheated (as it has before), but still smokin' like a mother.......

Is it likely that there's blockage by another piece of old impeller in the engine somewhere or is it an issue with the grommet in the water pump hole (i.e. not enough pressure to make it all the way around to the pee hole)? I did notice the little circle nipple on the grommet was half cracked at the base where it attaches to the grommet, but it still stays seated pretty well in the pump housing.

Any help would be great because the weather here in Michigan has me aching to get the boat out, but last fall I drove halfway across the lake and had it overheat on me. Oars suck.

THanks,
Earl

 

[sutor623]

Re: water impeller no water

Hey guys this thread is great. Exactly the same issue I'm having with my '67 3.9 merc. Here's what I've done, and still no water comes out the pee hole:

Replaced impeller that was shredded. It still wouldn't pee water, but it would spit a little bit until the engine started to get hot and then overheat.

Stuck a garden hose on the water pipe, solid stream shooting out the pee hole...so no blockage right?

Took the exhaust plate off the side and found a piece of old impeller inside the channel in the plate. Got it out and still no water out the pee hole.

Started it up with the "clean water flush" plug out and it shoots water out of that hole. Put the plug back in, no water out the pee hole.



So when I start it now it will shoot water out that hole by the powerhead bolt under the cowl for a bit. Then it starts to smoke A LOT and a steady stream of exhaust comes out of that hole and the pee hole. I noticed bubbles in the trash can coming up from the prop while it was running.

So I know it's pushing water up, but it just doesn't make it around to the pee hole. I let it idle for almost 10 minutes today and then revved it up in neutral and drive/reverse and it never overheated (as it has before), but still smokin' like a mother.......

Is it likely that there's blockage by another piece of old impeller in the engine somewhere or is it an issue with the grommet in the water pump hole (i.e. not enough pressure to make it all the way around to the pee hole)? I did notice the little circle nipple on the grommet was half cracked at the base where it attaches to the grommet, but it still stays seated pretty well in the pump housing.

Any help would be great because the weather here in Michigan has me aching to get the boat out, but last fall I drove halfway across the lake and had it overheat on me. Oars suck.

THanks,
Earl

Hey man, next time start a new thread The spot where you are leaking on top of the powerhead has a hose that runs to the peehole right?

 

[petewv]

Re: water impeller no water

I have a 9.8 hp 1965 motor. There is not a hose that runs to the pee hole. The lower cowl fills up with water, at the top of the cowl there is a opening were the water flows through to the pee hole. The water flows under the metal plate that is screwed down. Called a exhaust relief cover. Under the metal plate there is a plastic gasket, I was told on this site if the motor get hot I could have melt the plastic gasket that is under the cover causing the motor to overheat.. Under the plate there is a maze that the water flows through to get to the pee hole. It look like a W. On my motor the plastic pc is not good and flat. It is some what distorted. I will send pic. This after noon

 

[petewv]

Re: water impeller no water



In the the first pic is were pee hole is without cover.

the arrow in second pic is were the water tube is . the water go’s from the tube into the head comes out at point 1 , it also go’s through the head and comes out the side . it could be plugged up there
the 3ed pic. is a pic with cover over the pee hole.


The water get’s to pee hole were marked 1 .in this pic.
pete I