1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 49Get this manual

1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 49

Throttle Plate Synchronization f211Loosen cam follower adjustment screw and move cam follower away from throttle camf312Loosen
not be tied to dock or trailer2Start the engine and allow it to reach normal operating temperature3Check idle RPM in FORWARD
gear with an accurate tachometer 4Stop the engine to prevent contact with rotating partsLoosen locknut and adjust the idle
speed screw to achieve 800 25 RPM when idle speed screw is against its stopTighten locknut 5Start engine and verify idle
speed in FORWARD gearVerify that the idle timing is ATDC 1If idle timing is not within range, optimize the carburetor idle
mixture screwsRefer to Carburetor Mixture Adjustment, Section 2Then repeat Step 4If the engine does not respond properly
to this adjustment or if you cannot verify an idle timing of ATDC when engine is idling in FORWARD gear at 800 25 RPM, check
the following: Engine temperature Powerhead condition Sufficient exhaust back pressure Vacuum balance hose (if equipped)