Generac Power Systems 4451 & 4986 User Manual

Section 5
TROUBLESHOOTING FLOWCHARTS
Page 34
REPAIR
OR REPLACE
BAD
REPAIR
OR REPLACE
BAD
REPAIR
OR REPLACE
BAD
GOODGOODGOOD
GOOD
TEST 29 -
CHECK
SPARK
CHECK
FUEL
SUPPLY
TEST 38 -
CHECK
FUEL PUMP
CHECK CHOKE
POSITION AND
OPERATION
TEST 30 -
CHECK
SPARK
PLUG
TEST 35 - CHECK AND
ADJUST IGNITION
MAGNETOS
TEST 39 - CHECK
CARBURETION
TEST 40 - CHECK
VALVE
ADJUSTMENT
CHECK
FLYWHEEL KEY -
SEE TEST 35
TEST 41 - CHECK
ENGINE /
CYLINDER LEAK
DOWN TEST /
COMPRESSION
TEST
REPLACE SPARK PLUG
PUSH IN AFTER STARTING
REPLENISH
FUEL
SUPPLY
ADJUST
OR REPLACE
REPAIR OR REPLACE AS NECESSARY
REFER TO ENGINE SERVICE MANUAL P/N
0E2081 FOR FURTHER ENGINE SERVICE
INFORMATION
GOOD
GOOD
GOOD
GOOD
GOOD
ENGINE MISS
IS APPARENT
LOW FUEL
BAD
BAD
Problem 8 - Engine Starts Hard and Runs Rough
ADJUST VALVES
AND RETEST
BAD
BAD
TEST 5 - CHECK
STEPPER
MOTOR
CONTROL
REPLACE SWITCH
BAD
CHECK
ENGINE OIL
LEVEL
TEST 42 - CHECK OIL
PRESSURE SWITCH
AND WIRE 86
TEST 27 - TEST
START-RUN-STOP
SWITCH (SW1)
REPLACE SWITCH
REPLENISH OIL
VERIFY START STOP RELAY (SSR)
IS WIRED PROPERLY
GO TO PROBLEM 8
GOOD
OIL LEVEL O.K.
OIL LEVEL LOW
BAD
Problem 9 - Engine Starts Then Shuts Down

Generac Power Systems 4451 & 4986 Specifications

General

Brand	Generac Power Systems
Model	4451 & 4986
Category	Portable Generator
Language	English