1974 mercury 2 stroke water pump operation?

[LubricatedKitten]

Hello sorry for another dumb question i tried seeing if i could find anything on this but i cant use the search function correctly, in this video does it look like the water pump is working? I just wasnt sure with all that water coming out everywhere and not just the pehole

 

[racerone]

If you do not know how old the impeller is you need a new one.----And every 4 years after that.------Reason,----I doubt that motor has an overheat warning horn !

 

[LubricatedKitten]

If you do not know how old the impeller is you need a new one.----And every 4 years after that.------Reason,----I doubt that motor has an overheat warning horn !

is there a way to add one or just change the prop every 4 years

 

[jimmbo]

Nothing from Mercury, as for changing the Prop every 4 yrs... I have been using the same Prop since 2005 or 6.

 

[racerone]

Poster appears to be confused by the terms-----Impeller ----and----Propeller.-----One pumps water into the motor.

 

[Chris1956]

That motor is pumping water out of all the right places. However, as Racerone says, the impeller should be changed.

Those motors do not have a thermostat, and rely on more water being pumped to cool the motor than is needed. There is not much extra capacity, and if the impeller is worn, she can easily overheat and damage the motor.

You will want to replace the impeller, wearplate and 2 gaskets as a minimum.

There are lots of youtube videos on this subject. A service manual is good idea as well.

 

[LubricatedKitten]

gotcha, I have replaced the impeller that video is after I replaced it so it should be good for a few years? the boat guys around here said every year because its a hot desert. also I meant add a over heat horn not sure if thats possible

 

[Chris1956]

An overheat horn might work. A water temp gauge doesn't work on that motor, because it runs dead cold at idle and warmer as you accelerate.

Not sure what effects your climate has on the impeller. We change 'em every few years here in NJ.

 

[LubricatedKitten]

An overheat horn might work. A water temp gauge doesn't work on that motor, because it runs dead cold at idle and warmer as you accelerate.

Not sure what effects your climate has on the impeller. We change 'em every few years here in NJ.

its about 105 outside atm yesterday it was 108 sometimes we get 115 for a few days so maybe the heat cooks them? I know I cant touch any metal part of the motor sitting in the sun I have to put a towel over it before i do anything just to touch parts lol

 

[jimmbo]

I find 75 too hot, and have the AC going full tilt boogie

 

[LubricatedKitten]

I find 75 too hot, and have the AC going full tilt boogie

Most definitely my a/c is set to 63 most of the time and I only go fishing from 12am-5am so the sun hasn’t been out in awhile and the temp drops lol

 

[jimmbo]

When the temp drops the Relative Humidity goes up, and that is very unbearable, as Sweat can no longer evaporate, and body temp goes up. I strive to keep the humidity below 30% inside the house.