[rvguy]

We just came back from a awesome 4200 mile, 2 month trip out northwest/west.  As usual few issues arose while out on the road. I started to notice that generator will crank and try to start but wont, unless the coach engine is running. fuel filters appear to have no air in them and shut down solenoid working as should.. Yanmar engine/kohler gen 20k. soon as I start the coach the gen will start right up and run perfectly. Is the a lift pump somewhere on the unit for the generator ?  any other ideas ??

We stayed at some pretty cool places along our journey and will share some the the campgrounds/casinoes we stayed at that will hold the big newell coach.

[Richard]

Yes on fuel pump. Passenger side of engine.

Sounds like a low voltage situation. I woukd start be measuring dc voltage at gen with engine and gen OFF. Then crank and measure again. Low voltage could cause problems with either lift pump or hold in coil of shut off solenoid

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I was thinking the same as Richard. The other thing you can try is to put a jump pack on the generator starter and see if it starts and runs normally on the jump pack. But reading the voltage at the gen starter will tell you what is going on.

[hypoxia]

What Richard & Jeff said.  Find the ground wire for the generator, take it off of the grounding post & clean it.

[rvguy]

Will do and report back. Also Richard you stated lift pump is on the passenger side of engine  ( on the generator I am presuming correct ?)

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Will do and report back. Also Richard you stated lift pump is on the passenger side of engine  ( on the generator I am presuming correct ?)

Fuel pump will be right behind the fuel filter on the passenger side of the gen, see photo:
   

[HoosierDaddy]

   
Adam. My coach (316) is older than yours. it does not have electric lift pump. The mechanical pump is mounted just below the injection pump and driven off of the cam. If yours is the older type it won’t have electric pump.

[rvguy]

Good voltage at gen, cleaned the grounds, still same issue. checked the voltage at electric lift pump all good. pulled output line off lift pump, pump is dead. Now I got to go find one. lol

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Good voltage at gen, cleaned the grounds, still same issue. checked the voltage at electric lift pump all good. pulled output line off lift pump, pump is dead. Now I got to go find one. lol

I posted on the genny fuel pump, I found one at Napa while I was on the road. It’s a Carter fuel pump if I remember correctly.

Found the thread:
https://newellgurus.com/showthread.php?tid=8816

[Richard]

good trouble shooting !