I have a 5000 watt marine generator .Built In the boat from new (2007)Fourwinns 318 vista.It was tuned up at 130 hr. It was running great only the air conditioner was on,it stopped as if I turned it off .Tried to start it but no response of power .I had a marine mechanic look at it ,he said when he got it running at ran good but had to hold the start button down,when he let go of the button it would stop.He checked all the fuses and they were ok.He seems to think it needs a new control box (black box on the top right side.what do you think?

SOURCE: 5000 watt generator no juice

most generators have a reset button. check your manual under the trouble shooter section good luck.

SOURCE: gererator stops producing power

This sounds like a "flying open" in the rotor. Over time a small part of the wire that winds around the rotor has gotten cracked just enough to open up when it's warm and being pulled on by the force of the rotor spinning. To test this further, take the wires off the brushes and connect an ohm meter across them then run the generator, if you see the ohm meter indicate an open circuit you've found the problem. This can be repaired but it means removing the rotor and finding the weak spot in the winding. You could replace the rotor for a couple of hundred dollars or get a new generator.

Regards,
Carl

SOURCE: No power produced by All Power America 3500 Watt Generator

see if the breakers have been reset.

SOURCE: 1975, 7.5 Kohler marine genset, runs only with the reset depresed

Can't search for a manual without model, type, serial, etc numbers...

A few things to take a look at:

1) Oil level / pressure sending unit. This is normally bypassed as long as the start switch is pressed. When engine starts, and switch is released, engine will die if sending unit is defective, or you are low on oil.

2) Exhaust temperature sensors. Older units were notorious for burning these up.

3) Cooling Water Temperature sensor. These cause trouble often, but mostly due to water pump impeller being eaten away by galvanic action and not able to pump water as effecively. End result is water temp higher than normal, which trips the switch, which kills the engine.

4) Alternator (generator) output not as it should. If output doesn't rise to proper level within a few seconds of engine start, the engine will be shut down.

5) Choke not working as it should

6) Bad fuel, bad fuel pump, clogged fuel filter.

Robert

• 97 Answers
• Posted on Aug 31, 2010

SOURCE: I have a 5K gas

whats is the model and ser # i will check my diagrams