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I have a mercury 150 outboard motor If the water coming out of the pea hole is really hot does that mean the water pump is bad?
Not necessarily, on the 150 Mercury the tell-tale stream does not flow at full volume until the thermostats on both heads are fully open. The thermostats are designed to open at 143 degrees fahrenheit, so it is normal. On a cold day, you may even see steam coming off the pee stream. If in doubt, check the engine temp while at idle, and after a short run. It is normal to see the temperature in the 150 - 165 range.
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