Section 3 Engine Diagnostic Tests
26
Diagnostic Repair Manual
Problem 18 – Battery Will Not Charge
Problem 19 – Engine “Hunts” / Erratic Idle
REPLACE
BAD
REPLACE FUSE
BAD
END TEST
GOOD
GOOD
TEST 14 –
CHECK
FUSE
TEST 35 –
BATTERY
CHARGER
BAD
BAD
REPLACE
REPAIR OR
REPLACE
GOOD
GOOD
BAD
BAD - ENGINE
MISS APPARENT
GOOD
TEST 23 –
CHOKE TEST
TEST 20 –
CHECK
SPARK
TEST 21 – CHECK
SPARK PLUG(S)
*Acceptable running limits for the engine are between 59-62 Hertz.
ADJUST / RE-TEST
TEST 24 – CHECK
VALVE
ADJUSTMENT
NO
SURGING
STILL
SURGING
TEST 22 –
CHECK
CARBURETION
GOOD
TEST 30 –
CHECK
AND ADJUST
GOVERNOR
BAD
REPLACE
REPLACE MAGNETO
GOOD
TEST 27 –
CHECK
FLYWHEEL