Crappiebasser Posted March 23, 2018 Posted March 23, 2018 I have a 2004 Mercury 115 4 stroke that is not spraying from the tell tale. After I noticed it I replaced the water pump (old one looked good) and blew out the tell tale lines. Before changing the pump I had zero discharge I now have a slow drip from the tale. I pulled the LU off again submerged it and turn the drive shaft to verify the pump is working. Anybody have any suggestions on what else it could be? Quote
Super User fishnkamp Posted March 23, 2018 Super User Posted March 23, 2018 I would probably start by looking at the thermostats and passages for corrosion and junk. Were you testing it on a set of ear muffs or a tank? I would probably test it at the ramp still locked down on my trailer. There you can run it a while without doing damage, yet you can run it long enough to warm it up enough to open the thermostats. I would add a few extra straps up and over the hull of the boat for safety. I have seen my local marina do this a few times while their head mechanic ran some computerized troubleshooting. Quote
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