[sheriff554]

I have a 2001 force 75. The water pump started not working well at idle but would work fine at speed. I replaced impeller and still have same problem. At idle there is very little or no water from the pee hole but any throttle produces a stream but does not seem to get full force even at full throttle. How do I check for blockage internally and where?
D. Willis Louisiana

[Stratmando]

I have been worried about water not pumping due to the indicator. Sometimes, you can blow into the indicator or use a fine wire, and it will dislodge the dirt and start indicating correctly again. Has worked many times.
Good luck

[sheriff554]

Thanks for response. I've blown out tube and was wondering if debris could get caught inside thermostat housing or internal ports.