Carburetor; Ignition Timing - BRP Johnson 4HP Service Manual

CARBURETOR

INSPECT INITIALLY AFTER 10 HOURS (1 MONTH)
AND EVERY 100 HOURS (6 MONTHS) THEREAFTER.
Inspect the body, the float chamber, the lever, the linkage,
the connector and the fuel inlet.
If crack or other damage is found, replace.

IGNITION TIMING

INSPECT EVERY 200 HOURS (12 MONTHS).
NOTE:
Before checking the ignition timing, make sure that the idle
speed is adjusted within the specification.
1. Start and warm up the engine.
2. Attach the timing light cord to the spark plug high-tension
cord.

Timing light
3. Check the ignition timing while operating the engine at
the idling speed.
Ignition timing: Approx. BTDC 3° at 1300 rpm
PERIODIC MAINTENANCE
CARBURETOR
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