74 johnson 70 hp how to tell if water pump is working?

[dirtriderdave]

i was just wondering how you can tell if water pump is working on a 74 johnson 70

 

[jtexas]

Re: 74 johnson 70 hp how to tell if water pump is working?

If the motor doesn't seize up from overheating while running, the water pump might just be working.

If the spark plugs aren't dead white, the water pump might just be working.

If you can hold your fingers on the powerhead for several seconds without permanent scars, the water pump might just be working.

Last, but not least, if you've performed the retrofit described in this excellent tutorial:
http://forums.iboats.com/showthread.php?t=222677
you can just look at the telltale........

 

[tashasdaddy]

Re: 74 johnson 70 hp how to tell if water pump is working?

you have and exhaust relief ports on the upper rear of the leg, at idle you should get mist or droplets out of these ports. this is the tale tell on those motors.