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Altitude COMPENSATOR

NOTE: Altitude compensator can only be checked at altitudes of 1640-4920 ft. (500-1500 m).
  1. Remove air cleaner and start engine. Engine should idle smoothly. Place finger over slow port inside carburetor bore (located on right side of rear bore). With slow port covered, idle speed should drop.
  2. If idle speed does not drop, stop engine and remove compensator valve. With compensator valve removed, blow through drilled passages.
  3. Air should pass through valve from both passages at altitudes of 1640-4920 ft. (500-1500 m). If not, replace altitude compensator valve.
Fig 1: Altitude Compensator
G41379
Fig 2: Throttle Opener
G41378
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