Rich on Idle, Carter 1-barrel carbs


Rich on idle in Carter W1, WA-1, WO, WDO 1-barrel carbs

Possible cause:

Head of low speed jet unsoldered

Worn or too large metering hole in low speed jet

Upper end of low speed jet not sealed in casting

Air bleed or bypass hole in casting restricted with carbon

Economizer in casting too large

Idle port damaged

Gasoline leak at nozzle where it seats in casting

Idle screw damaged so as to prevent adjustment

Carbon around bore where throttle valve seats, causing a rich port opening

Throttle valve installed wrong

Updated on 06/23/2022

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