Inconsistent Water Flow Out the Pee Hole

[pondhopper]

Engine B100S 1302947<br /><br />The water flows out of the pee hole when idling. When I run the engine at higher RPM the water stops flowing completely. What could be wrong?<br /><br />I changed the impeler this spring and the water has been flowning fine.<br /><br />Would the thermostat cause this problem? I haven't changed it. I'm not sure where it is? The diagram in the SELOC manual wasn't very clear.<br /><br />Lastly, what year would this engine be?

 

[TOHATSU GURU]

Re: Inconsistent Water Flow Out the Pee Hole

Prostate trouble...or yu might have to go back into the waterpump and check the housing liner and wear plate. Also, you could have a build up of assorted minerals in the cooling passages or a blown headgasket.

 

[BF130]

Re: Inconsistent Water Flow Out the Pee Hole

I would start with the hole itself and look for obstructions, clean and test. Twice I've had sand in my tel-tale hole.<br /><br />Second, inspect the impeller to see if it has 'spun' on the shaft. I'm not familiar with the 100, but later models have a key that fits into the impeller at a flat spot on the shaft to lock it in place. Or the impeller itself could have cracked or broken splines.<br /><br />(I'm not a mechanic, just someone who owns a Honda motor.)

 

[Skinnywater]

Re: Inconsistent Water Flow Out the Pee Hole

From time to time I have to pull the rubber hose from the fitting on the block that goes to the tell-tale. A small paper clip size wire is used to probe into the fitting. I'll blow out the hose.<br />Everything works fine again.

 

[pondhopper]

Re: Inconsistent Water Flow Out the Pee Hole

Well I've replaced the thermostat, gaskets and really cleaned out the passages (air presure). I still had the same problem. I've moved to the lower unit. I pulled the impeller housing. I think it has a chip in it. (It's tough to tell if its suppose to be that way or not. I'll know when I get the new part) I've ordered a new housing and hope that will take care of my problem. The impeller, intake screen etc all look great.

 

[pondhopper]

Re: Inconsistent Water Flow Out the Pee Hole

I need more help! I replaced the impeller housing and impeller.(the housing did have a crack) The tel-tale has water coming out of it, but doesn't have a lot of force behind it. It seems the higher the RPM, the less the water flow. When running at low RPMs the water coming out of the tel-tale is luke warm. When I run it at full throttle it hot. To hot to hold your hand under. Is that normal? I've replaced the thermostat too. I still don't have a good idea on how those work. I don't understand how they regulate the water flow. It doesn't have any eletrical hooked up to it. Shouldn't the thermostat allow more water flow at higher RPM? It seem my thermostat works the complete opposit of what it should.

 

[cp]

Re: Inconsistent Water Flow Out the Pee Hole

The thermostat is a mechanical device which is why there are no wires to it. It does not continuously regulate water flow, but rather is an on/off valve which prevents cooling water flow through the engine until a preset temperature is reached. This serves to help the engine warm up quicker, thus reducing engine wear, buildup of deposits, and emissions. Once the desired temperature is reached, the thermostat opens and cooling water flows through the engine.<br /><br />Because the pee hole emits water at startup when the engine is cold and the thermostat is still closed, it's logical that its flow is not dependent on the thermostat being open. Your observation that the water from the pee hole is warmer at higher RPM makes sense since the engine is dissipating more heat at a higher RPM.<br /><br />The observation that there is less pee flow at higher RPM seems to indicate that you still have some restriction in the pee hole line. Here's the rationale for saying that: (1) When the thermostat is closed (at idle, engine cold) then the pee hole is the path of least resistance for the water being pushed by the impeller. (2) When the thermostat opens the water now also flows through the engine (a larger, less resistant path), but normally the impeller pushes enough water to keep the pee stream going, especially at high RPM. (3) But if your pee stream is restricted, then when the thermostat opens more of the water will go that way and you'll see less pee. Hope you can understand the foregoing.<br /><br />You did good replacing the thermostat, impeller and housing, so now you know they're all good. You did blow out the pee lines but maybe they're still restricted somehow? You can get air to flow through a partially blocked line, but perhaps not water in sufficient volume.<br /><br />JMHO, good luck.

 

[pondhopper]

Re: Inconsistent Water Flow Out the Pee Hole

Very good explination of the thermostat. I now understand how it works! I'm going to tear into it again and hopefully find something blocking the passage. <br /><br />Should the water be HOT at hight RPM when is comes out the tel-tale? I wouldn't say it's boiling, but it's hotter then 110 degrees.

 

[cp]

Re: Inconsistent Water Flow Out the Pee Hole

IMHO the pee stream will be warmer because of the reduced flow. Think about it...the water picks up more heat from the hot engine because it's flowing past slower than normal. Clear the restriction, let the water flow past faster, and you'll have a stronger tell-tale and a cooler one too. Especially check any tee fitting in your tell-tale lines; flakes of corrosion will build up there where the passage narrows. Good luck.<br /><br />p.s. If your piston block were cracked, seems like you'd be able to tell with a compression check .

 

[pondhopper]

Re: Inconsistent Water Flow Out the Pee Hole

Alright, I'm back at it. I could use some help. I have replaced the impeller housing and water was flowing out of the telltale again. I've ran the engine about 2 hours and it is doing the same thing. Water will stop flowing out of the pee hole at full throttle. I'm really confused. Please help!

 

[Harker]

Re: Inconsistent Water Flow Out the Pee Hole

It's not cavitating at high rpms is it? What does your temp guage say?

 

[pondhopper]

Re: Inconsistent Water Flow Out the Pee Hole

First question. What is the definition of cavitating? I've heard the word but don't know exactly what it is. Unfortunately I don't have a temp gage.

 

[scotty c]

Re: Inconsistent Water Flow Out the Pee Hole

cavitating is when the prop has no resistance<br />to the water and spins freely.<br />you will hear your motor rev up, often when you are turning too tight or perhaps trimmed up<br />too high.<br />did you try blowing out the discharge tube with<br />compressed air?<br />it really sounds like you have a piece of junk<br />stuck in the line.<br />do it while the motor is idling, pull off the tube and give it a good blast of compressed<br />airup the discharge tube.<br /><br />honda controls usually have an overheat alarm<br />that glows red with an audible alarm.<br />is it going off ?

 

[boatster]

Re: Inconsistent Water Flow Out the Pee Hole

Is your thermostat opening at the right temperature? Is it opening at all? I suggest take the thermostat and put in a really hot cup of water at the temp it should open at I dunno 120' Farenheit (just a rough guess). Consult your manual. It should open up at the very least. If not the thermostat is definitely toast. You need to make sure it opens at the right temp though. Some thermostats get old and will open only at hight temperatures, thus overheating. <br /><br />Check to make sure the thermostat is operating properly. I guess is what I'm trying to say.

 

[MajBach]

Re: Inconsistent Water Flow Out the Pee Hole

What the heck would cavitating have to do with this problem?<br /><br />Pondhopper: You haven't described if this occurs while on a boat or in a test tank. Is this motor brand new to you? In other words, did you have this problem from the start or is it something you've noticed this season? If the latter, has anything changed from when it was working properly, i.e. different boat, new prop, beginning of the season etc.<br /><br />I think we're overlooking the obvious here.

 

[Harker]

Re: Inconsistent Water Flow Out the Pee Hole

What the heck would cavitating have to do with this problem?<br /><br /><br />My thought was that since everything else had been tried that possibly he wasn't getting water in the pickups due to the engine being too hight to suck water at high speed. Just a thought.

 

[MajBach]

Re: Inconsistent Water Flow Out the Pee Hole

I see. That would be ventilation.

 

[pondhopper]

Re: Inconsistent Water Flow Out the Pee Hole

Thanks for the suggestions. Here's what I've done so far...<br />Replaced the thermostat<br />Blew out the water jacket and telltale hose<br />Replaced the impeller and housing (this correct the problem for awhile)<br /><br />Same boat, same prop, and I haven't used it a full throttle in a test tank. I guess I'll need to make one.<br /><br />This engine is new to me. I bought it last fall (2004) and ran the boat 3 to 4 hours. After about 6 hours of use this spring... June is when I lost water circulation. I did the above repairss. It was running fine for about 5-6 hours. Now it's STARTING to do the same thing. The telltale will stop "peeing" intermidentaly at full throttle. It works fine at idle. I'm up for suggestions. <br />Scotty C,<br />"do it while the motor is idling, pull off the tube and give it a good blast of compressed<br />air (up) the discharge tube." <br /><br />You don't mean, blow it back into the engine do you?

 

[MajBach]

Re: Inconsistent Water Flow Out the Pee Hole

Hmmm. I only asked about the tank test because I thought perhaps maybe the waterflow in the tank was somehow circulating so as to prevent it getting sucked in.<br /><br />This is really a mystery. I'm certainly no mechanic - just throwing ideas your way. I'm now quite interested in finding out the problem.<br />What's interesting is that you've pretty much repaired all that would be causing the problem. Peculiar how after the impellor was replaced, it did work fine for a short period. Makes me wonder if somehow the water you're running in is somehow clogging the intakes or ruining the impellor? What condition was the impellor in when you replaced it?

 

[scotty c]

Re: Inconsistent Water Flow Out the Pee Hole

yes, blow it back up the tube while running.<br />i was sceptical when the service dept. told me<br />this, but it worked.<br />i would not use a high pressure system though<br />just one of those cans of comperssed air.<br /><br />mine was so slow all it would do was dribble<br />out at idle.<br />no problem's, in fact i've done it a couple times since then.