Generac Power Systems 4451 & 4986 - Problem 8 - Engine Starts Hard and Runs Rough; Problem 9 - Engine Starts Then Shuts Down

Section 5
TROUBLESHOOTING FLOWCHARTS
Page 32
BAD
REPAIR
WIRING
GOOD
BAD
TEST 21 -
CHECK 10
AMP FUSE
TEST 26 - CHECK
STARTER
CONTACTOR
RELAY (SCR)
TEST 27 - CHECK
START-RUN-STOP
SWITCH (SW1)
GOOD
TEST 28 - CHECK
START-RUN-STOP
SWITCH (SW1)
WIRING
TEST 22 - CHECK
BATTERY
& CABLES
TEST 23 - CHECK
VOLTAGE AT
STARTER
CONTACTOR
REPLACE FUSE
FUSE BLOWS
REPAIR OR
REPLACE WIRING
OR SCR
REPAIR OR
REPLACE WIRE 16
REPLACE
BAD
BAD
REPLACE
GO TO PROBLEM 9
GOOD
GOOD
NO VOLTAGE
MEASURED
FUSE BAD
BAD
TEST 24 - CHECK
STARTER
CONTACTOR
GOOD
12 VDC
MEASURED
BAD
RECHARGE OR REPLACE BATTERY
- CLEAN, REPAIR OR REPLACE BAD
CABLE(S)
TEST 25 - CHECK
STARTER MOTOR
REPLACE STARTER
MOTOR IF DEFECTIVE
GOOD
CHECK FOR
MECHANICAL BINDING
OF THE ENGINE OR
ROTOR
Problem 6 - Engine Will Not Crank