Merc 1150 water pump?

[sheephead04]

I got a Mercury 115 h.p. This weekend i took it out to the coast and it ran just fine.I always keep an eye on the "pee-hole" to make sure the pump is working . I got it home yesterday and i noticed when i was flushing the motor with the muffs on it wouldn't pee at idle.The only way i could get a steady stream was to advance the throttle.It always "pissed at idle,could the pump have gone bad?The pump only has around 15 hours on it.Any advice before i drop the lower unit would really help.THANK YOU.

 

[phatmanmike]

Re: Merc 1150 water pump?

could be pump. could be thermostat. you could have sucked something up. blockage... just pull it and see, i have same motor and it was without a doub the easiest lower unit to change ever<br /><br />mike

 

[schaiss]

Re: Merc 1150 water pump?

The cooling water line at the top of your engine... Open it up and have a buddy hold the line... Put the muffs on and fire up the engine.<br />If a blockage is in the high pressure side of the cooling system you will see poor pressure/flow out of the hose. If you have good pressure flow, you should look at the poppet valve (could have weeds or other junk in there).

 

[sheephead04]

Re: Merc 1150 water pump?

Where is the poppet valve located at?I went ahead and dropped the lower unit.The pump looks fine i cant see any signs of melting,and the impellar looked good as well.Where else should i check for a possible blockage.Should i replace the impellar?Should i put it all back together and recheck for water pressure?Any help would really be appreciated.THANK YOU.

 

[Clams Canino]

Re: Merc 1150 water pump?

Note. The post title says 1150. All the 4 cylinder 115's were called 115's. <br /><br />The designation 1150 refers to the old inline 6, this means no thermostat - no poppet. <br /><br />If it's really an 1150, then it's either the pump or a blockage in the pee tube.<br /><br />-W