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we have two 7700 jd combines one that weve had for qutie a few years runs the rpms at about 2350
wwe bought one this past winter also and have been running both at different points in this harvest but the new one only runs at 2200 would it be feesible to turn the rpms up to match the other and how do u do that
 

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7700 I believe had a 404. They used a distributor pump. At the throttle linkage on the pump. There are to stop screws. with the engine not running and throttle at low idle. Turn the stop screw out on the high idle side. This would be the screw that stops the linkage when throttle is set to full. I would adjust half turn at time.
 
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