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2007 Yamaha f250 not peeing water

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Old 04-14-2018, 06:26 PM
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Default 2007 Yamaha f250 not peeing water

Took the boat out today and noticed that water was not coming out of the pee hole after running for approximately 15-20 minutes at a high rate of Speed. The motor was not really overheating either. No alarm and when I took the cowling off, the heads were not not really that hot. They were hot, but I was able to touch them. I checked the hose that attaches to the pee hole and was able to suck a little bit of water out of it. But no obstruction in the hose was found. When I took off the hose connection that you flush the motor with, that water was much hotter but not extremely hot. I ran the boat most of the day at a slower rate of speed with only a little dribble(a couple of drops) coming out of the pee hole and the motor never overheated (at least no alarm and no steam) I was wondering what you guys thought I should check first? Thermostat, water pump, poppet valve any help would be appreciated?
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Old 04-15-2018, 01:51 AM
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Originally Posted by schmittydpt View Post
Took the boat out today and noticed that water was not coming out of the pee hole after running for approximately 15-20 minutes at a high rate of Speed. The motor was not really overheating either. No alarm and when I took the cowling off, the heads were not not really that hot. They were hot, but I was able to touch them. I checked the hose that attaches to the pee hole and was able to suck a little bit of water out of it. But no obstruction in the hose was found. When I took off the hose connection that you flush the motor with, that water was much hotter but not extremely hot. I ran the boat most of the day at a slower rate of speed with only a little dribble(a couple of drops) coming out of the pee hole and the motor never overheated (at least no alarm and no steam) I was wondering what you guys thought I should check first? Thermostat, water pump, poppet valve any help would be appreciated?
The "pee" hole on the motor is not all the water that is running through the jackets. It is merely an "indicator" to let you know that water is circulating. Take the cowling off and locate the hose going to the pee hole. Unclamp it and clean it out. Also clean out the hole itself. This happened to me and it was just a buildup of sand and other particulates at the exit hole.
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Old 04-15-2018, 04:13 AM
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As scallen explained, while seeing the telltale water assures you that the pump is working,
it is entirely possible to have no telltale flow and still have normal engine temperature.

Importantly though, on your model the telltale water does have additional functions:
it cools the fuel, and it cools the regulator/rectifier - which could eventually be damaged without water flow.

Many folks successfully insert a piece of heavy monofilament / weedwacker line into the outlet hole
to "play urologist" and clear a blockage.
That may work for you.

Unfortunately, the water pathway through the r/r and fuel cooler is quite convoluted -
if there is a blockage further back from the outlet, you will have to follow the tubing
and may need to disconnect it at several points to clear it.
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Old 04-16-2018, 02:27 PM
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If your boat sleeps outside or in an area easily accessed by flying insects...there is a very high probability that the hose is clogged with red dirt or some sort of insect nest. This happens to my old 2-stroke every year. Just run something up in the tube, you will feel the blockage, remove the hose and blow it out with an air compressor. Good as new!
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Old 04-19-2018, 07:06 PM
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Originally Posted by frosstyx View Post
If your boat sleeps outside or in an area easily accessed by flying insects...there is a very high probability that the hose is clogged with red dirt or some sort of insect nest. This happens to my old 2-stroke every year. Just run something up in the tube, you will feel the blockage, remove the hose and blow it out with an air compressor. Good as new!
x2,,,damn mud-daubers
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Old 04-24-2018, 08:51 AM
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Originally Posted by Fwpratt View Post
Many folks successfully insert a piece of heavy monofilament / weedwacker line into the outlet hole
to "play urologist" and clear a blockage.
That may work for you.
A very trustworthy pro marine mechanic told me years ago that this is the issue about 85% of the time. Doesn't take much to block that tell-tale line up. Where we boat, it's common enough that I keep a piece of string trimmer line in my console to perform this surgery at least several times per season, every year.
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