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Mercury 25 hp 4 stroke troubleshooting
Mercury 25 hp 4 stroke troubleshooting






mercury 25 hp 4 stroke troubleshooting

With 2-stroke and 4-stroke gasoline engines as well as electric trolling motors existing in their product portfolio, Johnson was associated in the construction of boat motors throughout the 20th century. Has most regulation accessories and Bimini, canvas boat and motor covers. If I cant fix this myself I will be forced to bring it to a mechanic, although money is an issue right now.1999 johnson 25 hp outboard. My mercury manual (not a service manual which I cant find anywhere online of course) says that the constant beep and red light, along with loss of power is an over heating problem, but my motor is pissing out a lot of water as normal, and the thermostat appears to be new. I have no idea what's wrong at this point. Thus I have wasted time removing the thermostat and what was once a good gasket.

mercury 25 hp 4 stroke troubleshooting

It appears to open slightly at 60 degreees and a lot at near boiling water. I tested it in hot water (both boiling and 63 degrees since its a 60 degree thermostat. A local mechanic suggested it might be my thermostat, so I went about locating it and took it out. On the way home I noticed half my power was lost. I shut the motor off for a few minutes, turned it back on, and it didn't do it again. I put a new impeller in, and the motor was peeing like crazy! No problems for the rest of the season.įast forward to this year, after running the boat a few times the red light came on again and the constant buzzing. Right away I found out this was my problem, as the impeller was all warn and broken to ****. I managed to make it home, and took apart the lower unit to get at the impeller. I noticed that if I was driving at a faster speed the light wouldn't come on, only at lower speeds. I shut off the engine but couldn't figure out what was wrong. Last season when way out on lake Erie trolling my red warning light came on and there was a constant beep at my throttle box. I am capable of doing minor things and can follow instructions pretty well, but I cant rebuild an engine or anything. I bought a newer model motor (2007 Mercury 25 HP 4 stroke ELPT) as I am not too mechanically inclined.








Mercury 25 hp 4 stroke troubleshooting