Yamaha F20 Not "Peeing" Water

[sneak_e_pete]

Hi all, haven't been on here in forever, so first of all hello to everyone.  I need some help.  Started my Yamaha F20 this year and no water was "peeing out".  I tried to clear any obstruction around the hole and nothing.  I took the lower unit off and replaced the impeller (old one looked fine) and still nothing.  When I start the motor, I can tell it is pumping because the water is being forced out through where the lower unit and top end join.  The only thing I can think of is that the water pump housing is leaking?  Any thoughts/suggestions?  Thanks in advance!

[lew]

Could be a spider nest in the tube which is very common. Take a piece of stiff mono leader and push it into the hole and that will quite likely fix your issue.

[BillM]

Thick mono or trimmer line up the pilot hole would be the first thing I do.

[misfish]

What they both said. I had this a few times and it was always a wasp buried in it.

[sneak_e_pete]

Will give that a try tonight.  Thank you!

[SlipperyVic]

My 30hp Johnson would constantly get a spider in the tube and I'd have to clear it out with a bottom bouncer. I started putting a golf tee into the tube every time I'm done with the boat and problem solved.

 

[tomO]

Thermostat?

 

[Rizzo]

some of these motors also have a thermostat. I thought I had a problem once because mine wasn't peeing out either...waited around 30 seconds and it started. That was in some cold conditions, gotta admit I was very nervous letting it run those 30 seconds!

[rockin-steelhead]

As others have said could be thermostat 

think there is a way to test the impeller if pull the lower end and are able to turn the shaft at a good speed. 

Edited June 4, 2022 by rockin-steelhead