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Testing Deceleration Valve

High idling speed (1200-1400 RPM) which cannot be cured by normal adjustment may be caused by a permanently open deceleration valve. Check this by removing bottom cover and diaphragm.

CAUTION: Cover is spring loaded.

If valve is stuck in open position, replace complete deceleration valve assembly.

NOTE: Do not attempt to free valve. On 1970 models do not alter setting of plastic screw in top cover. On 1971 models, valve may be adjusted as follows:
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