My 1978 Kohler 7.5 Marine Genset runs for about 5 minutes then starts discharging stem instead of water. What could be the issue?

mamicheddy

• 79 Answers
• Posted on May 07, 2009

SOURCE: Hello, I have a Kohler Marine Generator that says OC on the menu when I try to start it. Any ideas?

OC stands for Over Crank. How long does it take before the genset starts?

SOURCE: kohler propane genset won't stay running

hi

try a new plug with the same heat range

bye

SOURCE: My kohler diesel genset starts but won't keep

check the ground block for any loose wires.
check the rpm sensor for dirt(clean rpm sensor).

SOURCE: I have a Kohler 12RES, 12.5kw genset. Less than a

check connections on speedsensor or take down rpms must be a screw or bolt on de fuelpump

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.