CHAPTER 3B ENGINE 50cc/80cc ATV SERVICE MANUAL09.0
CHAPTER 3B ENGINE PAGE 3B - 55 -
·Blocked air passage in carburetor
·Dirty air filter
·Air leak at carburetor or manifold
Backfire from exhaust at idle
·Air mixture screw set too lean
·Bad auto choke operation
Misfire under acceleration
·Poor spark
·Air mixture screw too lean
·Bad accelerator pump
3.8.2 Disassembly of carburetor
Disconnect cable connector for auto chock.
Loosen carb drain screw and drain fuel from float
bowl.
Loosen throttle cable and remove from support
and throttle control plate.
Remove fuel line from carburetor.
Remove air inlet tube from carburetor and pull
carburetor straight back out of intake manifold.
Remove auto choke from carburetor.
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