Onan 4KY fuel pump replacement method?
Does anyone have a step by step process to replace the fuel pump on an Onan 4KY? Upon testing my genny in the hot weather yesterday, it ran for about 10 minutes under load, then abruptly quit. ...
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I had exactly the same thing happen about 5 years ago. A new fuel pump (same number as yours) resolved the problem.
You probably already know that the pump is beyond and under the control board on the left side of the generator. It is visible in this picture.
1. For safety's sake, disconnect shore power and also the ground wire from your house batteries. Verify that the generator won't crank. If it does disconnect the MH engine starting battery ground wire.
2. Disconnect the fuel line where it connects to the filter and plug the line to keep gas from dripping.
3. Remove the large red wire from the start solenoid and unbolt the solenoid to get it out of the way.
4. Remove the control board (2 #30 Torx screws)
5. There is one #30 Torx screw holding the pump foot to the bottom pan. The other foot on the pump is held in a slot in the bottom pan.
6. Disconnect the pump discharge hose and power wire.
7. Do the above in reverse order to install the new pump.
Easy job.
You probably already know that the pump is beyond and under the control board on the left side of the generator. It is visible in this picture.
1. For safety's sake, disconnect shore power and also the ground wire from your house batteries. Verify that the generator won't crank. If it does disconnect the MH engine starting battery ground wire.
2. Disconnect the fuel line where it connects to the filter and plug the line to keep gas from dripping.
3. Remove the large red wire from the start solenoid and unbolt the solenoid to get it out of the way.
4. Remove the control board (2 #30 Torx screws)
5. There is one #30 Torx screw holding the pump foot to the bottom pan. The other foot on the pump is held in a slot in the bottom pan.
6. Disconnect the pump discharge hose and power wire.
7. Do the above in reverse order to install the new pump.
Easy job.
