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MEP-803a injection pump question

Suprman

Well-known member
Supporting Vendor
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Location
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On a MEP-803a I have, the injections pump fueling control arms that have the pins that sit in the fuel rack are very tight. So tight that the rack spring cant move them all the way to run position. Most small injection pumps I have seen they are loose to the point where you can shake the ip and the fuel control arm flops back and forth. All 4 of the pumps from this generator are all the same. I soaked the pumps for a week in carb cleaner and then another week in marvel mystery oil. The pumps look real clean now. Is there an adjustment on the pumps?
Thanks
Will
 

Light in the Dark

Well-known member
Steel Soldiers Supporter
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MA
I've had to vice them and get that arm moving again (with a bit of persuasion) to free it, even after sitting in the dip for a few days.
 

Suprman

Well-known member
Supporting Vendor
6,832
645
113
Location
Stratford/Connecticut
All of the arms move. They are just tight. I have worked them they don’t seem to want to loosen up. I was thinking about taking each one apart one at a time. Havent taken one apart before. Don’t want to damage the pump.
 

jamawieb

Well-known member
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Location
Ripley/TN
Lower hour units will be super tight. Compress the spring on the bottom just alittle to see if it gets looser. You'll need to just keep cleaning and moving them back and forth multiple times (hundreds) LOL!
 
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