Problem 11 - Engine Turns Over But Will Not Start (208/389/420Cc Non-Efi Engines); Problem 12 - Engine "Hunts" / Erratic Idle (208/389/420Cc Non-Efi Engines) - Generac Power Systems XT-EFI Series Manual

Section 5 Engine Diagnostic Tests
Problem 11 – Engine Turns Over But Will Not Start (208/389/420cc Non-EFI Engines)
CHECK
FUEL
GOOD
SUPPLY
REPLENISH
FUEL
SUPPLY
GOOD
TEST 22 –
BAD
CHECK
CARBURETION
GOOD
TEST 24 –
GOOD
CHECK VALVE
ADJUSTMENT
BAD
ADJUST AND
RE-TEST
Problem 12 – Engine "Hunts" / Erratic Idle (208/389/420cc Non-EFI Engines)
*Acceptable running limits for the engine are between 59-61 Hertz.
TEST 23 –
CHOKE TEST
SURGING
NO
SURGING
TEST 22 –
CHECK
CARBURETION
22
CHECK FUEL
GOOD
SHUTOFF
VALVE
OFF
TURN
ON
TEST 21 –
CHECK SPARK
PLUG
BAD
REPAIR
OR REPLACE
TEST 25 – CHECK ENGINE /
CYLINDER LEAK DOWN TEST /
COMPRESSION TEST
BAD
REPAIR OR REPLACE AS NECESSARY
REFER TO ENGINE SERVICE MANUAL
TEST 24 – CHECK
STILL
VALVE
ADJUSTMENT
BAD
ADJUST / RE-TEST
TEST 29 – CHECK
REPAIR OR
REPLACE
TEST 20 –
CHECK
BAD
SPARK
GOOD
OIL LEVEL O.K.
TEST 32 –
CHECK OIL
LEVEL SWITCH
BAD
REPLACE SWITCH
REPLACE LOW OIL ALARM
GOOD
CHECK
FLYWHEEL
KEY
GOOD
GOOD
AND ADJUST
GOVERNOR
BAD
REPLACE IGNITION COIL
TEST 28 – REMOVE
WIRE 18 /
SHUTDOWN LEAD
SPARK
CHECK ENGINE
OIL LEVEL
OIL LEVEL LOW
REPLENISH
OIL
TEST 18 – TEST
GOOD
OFF-ON SWITCH
REPLACE SWITCH
TEST 20 – CHECK
IGNITION SPARK
GOOD
TEST 21 – CHECK
SPARK PLUG
BAD
REPLACE
BAD
Diagnostic Repair Manual
NO
SPARK
TEST 26 –
CHECK
IGNITION COIL
BAD
REPLACE
IGNITION
COIL
BAD
GOOD
BAD - ENGINE
MISFIRE
APPARENT
TEST 26 –
CHECK
IGNITION COIL