Water not coming out of pee hole, but out exhaust on 1999 mariner v6 2 stroke

[Marcus.S]

I have a 1999 mariner and when I put it on the muffs water will not come out of pee hole, but it will come out of the exhaust. Warm air is coming out of the pee hole but no water, I have let it run a minute or two but don't want to wreck any thing. Is this an impeller issue or something more major.

 

[hotrod53]

Re: Water not coming out of pee hole, but out exhaust on 1999 mariner v6 2 stroke

Sure sounds like an impeller problem and I say that because if the pee hole were blocked, you wouldn't feel anything coming out, even air. Is it possible that the block is still filling or the thermostat hasn't opened yet? I read recently that it is common for the block to take a maximum of 20 seconds to fill before peeing.

On my '77 Merc 500, there is a brass plug near spark plug #2 that is in the water jacket. When the water pump is pumping, water should shoot out of that hole in a good stream. Maybe you could check for a plug on yours and see if you get flow. When my pee hole was plugged I had flow there and stuck a wire in the pee hole to clear it. I've never worked on a V6, only inlines so I'm not sure if this applies.

It was also described to me recently that an impeller is a displacement pump at idle and a slinger at higher RPM making it possible that revving it slightly may allow it to start peeing. If the problem persists at idle indicates that the impeller needs replaced.

 

[Marcus.S]

Re: Water not coming out of pee hole, but out exhaust on 1999 mariner v6 2 stroke

Thanks for the reply. I'll have to try and find a plug somewhere to see if there's water flow. On the back of my motor there is a clear hose that fills up, but it is very slow and doesn't really pressurize that hard being that there is usually an air pocket that never really leaves. I can feel air coming out of the pee hole though which has me thinking thermostat and a possible weak impeller.

 

[hotrod53]

Re: Water not coming out of pee hole, but out exhaust on 1999 mariner v6 2 stroke

Oh BTW, you can blow compressed air thru the water jacket and you should hear it coming out of the lower intake grates. That's how I cleared mine this year.