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highway and check governor operation. The
governor should limit engine speed to 3600 RPM
plus 150-250 RPM initial overrun. If the engine does
not
govern,
disconnect
the
secondary
throttle
diaphragm link from the secondary throttle shaft
lever. Operate the vehicle again on only the primary
carburetor venturis. If the engine governs now,
the problem is in the secondary control valve. Some
4150G carburetors will be equipped with a secondary
throttle diaphragm assembly air filter. If the air filter
becomes clogged the governor will not operate
properly. To check the filter for restriction, blow
through filter tube. If air does not pass freely,
replace filter.
NOTE: Check air filter every 24,000 miles or 24
months whichever occurs first. In vehicles
operated in dusty conditions, check for filter
restrictions more frequently .
Correct operation of the secondary throttle system
and the governor depends upon proper functioning of the
secondary control valve. Use of the test procedures described
will assist in diagnosing governor problems and checking
secondary control valve operation.
CGES-125-T Page 45
PRINTED IN UNITED STATES OF AMERICA
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