Troubleshooting – Sears 143.999 User Manual
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TROUBLESHOOTING
THE FOLLOWING MAY HELP AVOID A DELAY IN YOUR WORK OR
SAVE THE EXPENSE OF A SERVICE CALL.
ENGINE FAILS TO START OR STARTS WITH DIFFICULTY
CAUSE
REMEDY
Controls not in start position.
Move ENGINE CONTROL or equipment control to ’HI“ or
START postion. See 'STARTING* instructions in this
manual.
Spark plug wire disconnected from spark plug.
Connect SPARK PLUG WIRE to SPARK PLUG.
Spark plug fouled.
Remove SPARK PLUG and clean it. See 'SPARK
PLUG* instructions in 'MAINTENANCE* section in this
manual.
Spark plug porcelain cracked.
Install new spark plug.
Insufficient fuel.
Fill FUEL TANK per "BEFORE STARTING' instructions.
Water or dirt in fuel.
Drain FUEL TANK and re-fill with clean, fresh gasoline.
See "BEFORE STARTING* instructions in this manual.
Improper carburetor adjustment
Adjust carburetor (if applicable). See 'ADJUSTMENTS’
section in this manual.
ENGINE LACKS POWER
CAUSE
REMEDY
Dirty air cleaner.
Replace or clean air cleaner per 'AIR CLEANER'
instructions in 'MAINTENANCE* section In this manual.
Improper carburetor adjustment.
Adjust carburetor (if applicable). See 'ADJUSTMENTS'
section in this manual.
Lack of lubricaiton.
Fill oil sump to proper level. See 'BEFORE STARTING'
instructions section in this manual.
ENGINE MISSES UNDER LOAD
CAUSE
REMEDY
Spark plug fouled.
Remove SPARK PLUG and clean it. See 'SPARK
PLUG* instructions in 'MAINTENANCE' section in this
manual.
Spark plug porcelain cracked.
Install new SPARK PLUG.
Improper spark plug gap.
Regap SPARK PLUG electrodes. See 'SPARK PLUG'
instructions in 'MAINTENANCE' section in this manual.
Improper carburetor adjustment
Adjust carburetor (If applicable). See 'ADJUSTMENTS*
section In this manual.
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