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| Have an 8770 that is surging. At first thought it was filters. Have changed them 3 times and the fuel looks clean in them. Have also cleaned the sediment bowl. The tractor has a Napa 3411 filter which does not have the clear plastic piece on the bottom like the orginal but it does have a water drain. The tractor runs for about 1 - 2 hours fine before it starts "surging." If I let it cool then go back it's fine for another 1 - 2 hours. The radiator temp is normal and the exhaust temp is low. I'm stumped. Can anyone point me in the right direction. Thanks | |
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NH 8770 loosing power / surging
