flush port

[jvoldarski]

just a quick question... i recently got an mercury outboard and i was wondering if there is supposed to be a seal and plug in the flush hole or is it ok to leave it open, the motor didnt have one.

 

[charlie741]

Re: flush port

It should have a plug. I have no idea if it would hurt to run without, but I imagine it would cause lower water volume going up to motor.

 

[Chris1956]

Re: flush port

That plug fits into the side of the waterpump cover. Running without one would allow water to leak out and lower cooling water pressure and volume. Not good. Plug it with something, ideally a threaded plug that fits flush in the waterpump body.