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Author Topic: 4 KY Genset Fuel Filter  (Read 1400 times)

b777

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4 KY Genset Fuel Filter
« on: July 01, 2010, 06:15:59 PM »
My KY 4000 Genset starts up for a few seconds then stalls,I want to replace the fuel filter for it but unable to follow the fuel line to it,any ideas where it might be located?I have a Class C Coachman,Thanks

Gary RV Roamer

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Re: 4 KY Genset Fuel Filter
« Reply #1 on: July 01, 2010, 07:53:33 PM »
Is that an Onan model? Never heard of KY as a brand name, but Onan has a KY model of generator. Here is the manual for the Onan KY 4000 genset

http://www.cumminsonan.com/www/pdf/specsheets/a-1421.pdf

But I think the fuel filter, if any, may be external to the generator. Normally, it is right at the fuel inlet to the generator, or very close to it.
Gary
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Gary Brinck
2004 American Tradition
2007 GMC Acadia
Homebase: Ocala National Forest, FL

Lou Schneider

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Re: 4 KY Genset Fuel Filter
« Reply #2 on: July 02, 2010, 12:52:33 AM »
Does it run as long as you hold the Start switch, then shut down?  Onan needs to see AC voltage from the generator and oil pressure in the engine to keep running after you release the switch.

Check the oil level - if it's OK then the generator is not putting out voltage.   Probably a bad voltage regulator.

Howard R

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Re: 4 KY Genset Fuel Filter
« Reply #3 on: July 02, 2010, 02:14:17 AM »
My KY 4000 Genset starts up for a few seconds then stalls,I want to replace the fuel filter for it but unable to follow the fuel line to it,any ideas where it might be located?I have a Class C Coachman,Thanks

On our Coachmen Mirada with the 4KW Onan the fuel filter was just before the fuel pump at the lower left side of the generator.

Howard

2001 Fleetwood Southwind 35R
V10   F53
Colorado

b777

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Re: 4 KY Genset Fuel Filter
« Reply #4 on: July 02, 2010, 12:29:44 PM »
Thanks everyone,I will first try and replace the fuel filter as it most likely has not been replaced since new,I am also going to change the oil,oil filter and plug.At the moment the generator will start up upon spraying starter fluid into carb but almost immediately stalls thereafter,any other tips would be most helpfull to this newbe ,Oh I dont know why I called the Genset a KY,must have been thinking about someother lubricant! ;D
« Last Edit: July 02, 2010, 12:32:34 PM by b777 »

Gary RV Roamer

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Re: 4 KY Genset Fuel Filter
« Reply #5 on: July 03, 2010, 10:16:56 AM »
Possibilities are the fuel filter, a leaking fuel line (sucking air) or a bad fuel pump. Old fuel lines are particularly susceptible to pinprick air leaks that stop the genset from running.
Gary
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Gary Brinck
2004 American Tradition
2007 GMC Acadia
Homebase: Ocala National Forest, FL