mystery junk

on my 2012 mercury 60 horse boat motor where the water comes out No water comes out all the time, brought it home to winter ready it, lower unit check, and fill, grease motor, grease trailer, and I thought I would put the ears on the motor and run it a minute or two kinda move the oil around... well nothing came out of the P hole, shut it down checked and this reddish brown, sea weed looking piece was pooching out, flicked it out and started the motor and it sprayed good, shut it off waited a few minutes started it again, Nothing, did this 3 times. water came out 3 times, took boat back to dock, started it and darn nothing again, zipped to the dock right quick put on lift and checked out the p hole again, same sea weed looking gunk, it is soft, and not much to it, flick it and it comes to pieces.
so have any of y'all had this problem. and one more question How hard is it to pull bottom off and check impeller and such.

It's not too bad a job to pull the foot off and change the water pump. Youtube is your friend. I had a blockage in my Yamaha 90 hp that you and I fished out of several times. I had it in the shop twice. They couldn't fix it (or didn't want to try). I brought it home and took the foot off to change the water pump. While I had it off, I took the thermostat out as well and ran a water hose through the thermostat opening. It flushed out what ever was in there. After I put the new pump in and put it back together, it pee'd like a two year old Clydesdale.

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Originally Posted by Speck

It's not too bad a job to pull the foot off and change the water pump. Youtube is your friend. I had a blockage in my Yamaha 90 hp that you and I fished out of several times. I had it in the shop twice. They couldn't fix it (or didn't want to try). I brought it home and took the foot off to change the water pump. While I had it off, I took the thermostat out as well and ran a water hose through the thermostat opening. It flushed out what ever was in there. After I put the new pump in and put it back together, it pee'd like a two year old Clydesdale.

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when can I expect you and yours up here to fix same.... ?

Wish I could help, but no ideas. Hope you get it fixed soon.


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We have so much trouble with bugs building in the pee hole we stick a short piece of weed eater line in there to block them.

Mud daubers are terrible about plugging up little holes.

Sometimes a piece of weedeater string will fit down into the pee hole and clear the obstruction, but by the sounds of it you have quite a bit of it in there.

I'd pull the thermostat and screens in the lower unit, then stick a garden hose in the thermostat hole and flush the motor from the top down, before taking the foot off. You'll have the best chance of dislodging anything this way.

Those Mercs have a splined shift shaft that is generally easy to deal with, just pull the half dozen bolts out of the lower unit and drop it, putting it back in can be tedious as the water tube, shift shaft, and drive shaft need to be lined up. Some prefer to put the motor in forward gear before dropping it, that way you can spin the prop while lifting the leg, helps line up the splines.