2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 104Get this manual

2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 104

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FUEL SYSTEMCARBURETION

Loose jets Worn jet needleneedle jet or other carburetor parts Dirty carburetor (air bleed passages or jets) Weak or damaged vacuum piston return spring Fouled spar