When you step on the gas and get as stumble or hesitation it’s typically caused from a lean fuel condition.
Most likely causes:
- accelerator pump plunger is adjusted wrong or needs to be replaced
- throttle cable is out of adjustment (we do not have any adjustment info for the throttle cable)
Other possibilies:
- pump jet clogged
- high-speed valve improperly adjusted
- discharge check valves (weights) out-of-round or seat worn
- accelerator pump linkage defective or worn
- power piston sticking or worn
- power valve not seating properly, spring worn, or power jet clogged
- reloader out of adjustment
- float level too low
- throttle valve misadjusted