Forum Discussion

Kennyg's avatar
Kennyg
Explorer
May 14, 2021

Help! Onan 4K generator refuses to start and stay on

Here I go again. Am at home now and I tried the generator again. It started, but only for about 15 seconds and then shut down. During this short time it ran rough and the exhaust blew constant blue sm...
Class C
ndrorder's avatar
ndrorder
Explorer
May 15, 2021
whemme wrote:
jyh818 wrote:
Are you below 1/4 tank of gas in your RV. I think it prevents you from using the generator if your RV fuel tank is below 1/4 tank.

If that was true the generator would not even start and run for 15 seconds. Problem sounds to me that you may have a defective Onan fuel pump.


Not exactly. There is about 15 seconds of runtime worth of fuel in the carb bowl when it is full. Without 1/4 tank or more or with a failed fuel pump, then the bowl wouldn't be replenished.

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