Oil & Fuel BX24: Engine RPM goes up and down sporadically

   / BX24: Engine RPM goes up and down sporadically #1  

lilmatt

New member
Joined
May 12, 2009
Messages
6
My BX24's engine RPM just started going up and down randomly. My wife was running it and just about ran it out of fuel. I was thinking that running it that dry sucked in any twigs and rocks in the fuel tank, so I replaced both fuel filters today. After bleeding the air out, it ran nicely for about 15 minutes, but then started doing the same thing again. Is there any way to check if the fuel pump has gotten junk in it, and clean it if it does? Some air cooled VWs have a tiny screen in the fuel pump you can clean. I'm wondering if there's anything similar on the Kubota, but given the size I'm guessing no.

My next plan is to order up some filters from Messicks (as I now have used my spares), replace the rear filter again, and see how we do. I did put Diesel Kleen in it, and filled it with fresh diesel before I learned of the surging thing.

Does this sound like a good plan? How likely is a bad fuel pump?
 
   / BX24: Engine RPM goes up and down sporadically #2  
Sounds like you are on track. I would check the flow before the primary filter to make sure you have free flow to the electric fuel pump. Sometimes gunk can plug up the tank port. Also try to run it with the fuel tank cap loose as the vent can get plugged and cause fuel delivery issues.
 

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