Guardian 4389 Repair Manual page 94

SECTION 4.3
TROUBLESHOOTING FLOW CHARTS
Problem 11 - Engine Starts Hard and Runs Rough / Lacks Power
TEST 51 - CHECK
FUEL SUPPLY
AND PRESSURE
BAD
FIND AND CORRECT
CAUSE OF NO FUEL OR
LOW PRESSURE
TEST 57 - CHECK
ENGINE
COMPRESSION
GOOD
TEST 63 - CHECK
FUEL REGULATOR
BAD
REPAIR OR
REPLACE
Page 92
IF RECONFIGURED TO LP GAS,
VERIFY THAT PROPER
GOOD
PROCEDURE WAS FOLLOWED
AS STATED IN OWNER"S MANUAL
ADJUST OR
REPLACE
GOOD
REFER TO ENGINE
BAD
SERVICE MANUAL
GOOD
FLYWHEEL KEY
PART 4
GOOD
TEST 59 - CHECK
AND ADJUST
BAD
IGNITION MAGNETOS
CLEAN, REGAP
OR REPLACE
TEST 12 - CHECK
AND ADJUST
ENGINE
GOVERNOR
BAD
READJUST
CHECK
TEST 59
DC CONTROL
TEST 55 - CHECK
FOR IGNITION
SPARK
BAD
GOOD
TEST 56 - CHECK
BAD
SPARK PLUGS
GOOD
TEST 62 -
CHECK AND
GOOD
ADJUST VALVES
BAD
READJUST