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Reply to "Stumble!!"

Just in case it's not obvious to you: It's very important to ensure your accelerator pump actuation arm screw is adjusted to start it's stroke with the slightest movement of the throttle shaft - both the primary and secondary - if a double pumper, or just primary if vacuum secondary. Without getting that right, swapping cams is hit and miss. You'll need to recheck/adjust again with every pump cam change.

Andy
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