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Yamaha F150 pilot hole discharge issue

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Yamaha F150 pilot hole discharge issue

Old 01-14-2019, 05:17 AM
  #1  
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Default Yamaha F150 pilot hole discharge issue

Hello, recently I serviced my Yamaha F150XB by dropping the lower unit and rebuilding the water pump per maintenance requirements. Everything went great, got it all back to together ran the boat for some time, water pressure was good, temp was good and water was discharging from the pilot hole as it should. I got the boat back on the lift and went to flush the engine with the hose connection per usual (not running the engine of course) and no water discharged from the pilot hole. Prior to the pump re-built, everytime I flushed the engine this way, water would always discharge out of that pilot hole, now it is not. Anybody had this issue? Doesn't seen like a big deal, perhaps re-building the pump created a lesser back pressure when flushing for some reason??

Thanks
Jeff
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Old 01-14-2019, 05:49 AM
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my F150 pees on the hose sometimes, other times it doesnít. I chaulk it up to water pressure, temperature, time on the hose, and where my boat is. ie, if itís on a rack its gotta pump water against gravity but if itís at the dock the water is flowing down hill from the marina thus making it easier. Not really sure if any of that is the reason but mainly Iím just concerned with it peeing while Iím running it.
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Old 01-14-2019, 02:29 PM
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Thanks flfJack. That's what I was thinking as well. Just interesting it started doing this only after impeller change...odd. As you said, as long as it's peeing while the engine is running all is good!
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