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Onan CCK Fuel Pump


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  #1  
Old 01-05-2010, 01:14 AM
Jscatt Jscatt is offline
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Default Onan CCK Fuel Pump

Hello!
I just got a Onan RV generator model 4.0 cck-1R/6000P. It is missing the fuel pump and was if it could be replaced by anything except the 200+ dollar oem pump. Thanks!!
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Old 01-05-2010, 09:40 AM
K D Redd K D Redd is offline
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Default Re: Onan CCK Fuel Pump

Go to a local auto parts store and buy a LOW PRESSURE ( 2 to 4 PSI) 12 volt electric fuel pump.

Kent
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Old 01-05-2010, 10:26 AM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: Onan CCK Fuel Pump

Block off the old pump mount with a steel or aluminum plate to seal the block!
Andrew
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Old 01-05-2010, 11:21 AM
Dave Edmonds Dave Edmonds is offline
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Default Re: Onan CCK Fuel Pump

Pumps can occasionally be found on Ebay, but they are rare. The advice provided above worked for me. I used a Mr. Gasket 42-S pump (2-3.5 psi) from Advance Auto Parts for about $40.00 Works great! (Don't get the 12-S model; it makes too much pressure).
Dave Edmonds
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Old 01-05-2010, 11:35 AM
Jscatt Jscatt is offline
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Default Re: Onan CCK Fuel Pump

Thanks for the advice! I'm sure I'll be back with more questions!
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Old 01-05-2010, 07:44 PM
bobbyz72 bobbyz72 is offline
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Default Re: Onan CCK Fuel Pump

you say you just got the generator. What do you plan to do with it? If you plan to make a regular generator out of it as it did you could just mount the take above the generator and you dont need a fuel pump.
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Old 01-05-2010, 07:47 PM
Dave Edmonds Dave Edmonds is offline
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Default Re: Onan CCK Fuel Pump

Bobbyz72 is correct. The carb can be gravity-fed if you choose to do so. The purpose of the fuel pump is to get the fuel from the tank to the carb, not to "pressurize" anything.
Dave Edmonds
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Old 01-05-2010, 07:54 PM
Ben Cowan Ben Cowan is offline
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Default Re: Onan CCK Fuel Pump

Yep, don't have to have it but, I've got mine on a small trailer and run it with 5 gallon fuel tanks that I place on the ground beside the unit. You might consider placing one of the outboard motor fuel primer bulbs between your tank and the fuel pump. This certainly makes it easier to prime and start the unit. I personally like to run my unit completely out of fuel and leave my carb dry when storing the generator. I also used one of the Mr. Gasket pumps on my 4.0 cck generator. No problems, works just fine. Ben
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Old 01-06-2010, 12:51 AM
richard.bessey richard.bessey is offline
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Default Re: Onan CCK Fuel Pump

Quote:
Originally Posted by K D Redd View Post
Go to a local auto parts store and buy a LOW PRESSURE ( 2 to 4 PSI) 12 volt electric fuel pump.

Kent
2nd on ordering a new automotive pump. I did, but the pump put out too much pressure so I had to add a regulator, works like a champ.
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Old 01-06-2010, 09:18 AM
K D Redd K D Redd is offline
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Default Re: Onan CCK Fuel Pump

You have to be sure you get a LOW PRESSURE one. One local auto part store where I shop, In the Performance/Hot Rod Area has two small square electric fuel pump. The look identical except for color of the decals on the clear plastic box. One is 4 to 7 psi. The other is in the 2 to 4 psi range. You have to watch what you pick-up.

Kent
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Old 01-06-2010, 01:35 PM
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Billy J Shafer Billy J Shafer is offline
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Default Re: Onan CCK Fuel Pump

The only thing wrong with gravity fed system. If the seat gets trash under it you will drain the gas tank into places you do not want gas to go. Have a shut off valve on the tank.
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Old 01-06-2010, 02:31 PM
Dave Edmonds Dave Edmonds is offline
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Default Re: Onan CCK Fuel Pump

GOOD point, Billy. I filled up my CCK in the wintertime (has a 6-gallon boat tank and mechanical fuel pump), and closed the vent on the tank. When the gasoline heated up in the spring, it expanded, went through the fuel pump valves, found a less-than-optimum-sealing needle and seat, and filled the crankcase with gasoline! Same thing happened to my son, with a 71 Fiat when he had the fuel tank out of it and was running the engine on a boat tank elevated above the carburetor. Engines do not like having their crankcases filled with gasoline! (I guess the only good thing is that it gets some of the sludge out!)
Dave Edmonds
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Old 01-11-2010, 10:35 PM
Jscatt Jscatt is offline
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Default Re: Onan CCK Fuel Pump

Well, I purchased the low pressure fuel pump and installed it and it works great! I never thought of the gravity feed idea, guess I should have waited for more replies! Anyway, thanks for all the advice!!
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