Section 6

TROUBLESHOOTING FLOWCHARTS

Problem 8 – Engine Starts Hard and Runs Rough (Gasoline Units)

TEST 25 –

CHECK

FUEL

SUPPLY

LOW FUEL

 

 

 

 

TEST 29 –

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST 30 –

 

 

 

 

 

 

 

CHECK

 

 

 

 

 

 

CHECK

 

 

 

 

 

 

 

 

GOOD

 

 

GOOD

GOOD

 

 

 

 

 

 

 

IGNITION

 

 

 

 

 

SPARK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPARK

 

 

 

 

 

 

PLUGS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BAD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ENGINE MISS IS APPARENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLEAN AND REGAP OR

 

 

 

 

 

 

 

 

 

 

 

 

REPLACE SPARK PLUG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REPLENISH

FUEL

SUPPLY

TEST 31 – CHECK

AND ADJUST

IGNITION

MAGNETOS

BAD REPLACE MAGNETOS

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST 34 – CHECK

 

TEST 33 – CHECK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GOOD

 

 

 

 

 

 

 

CHOKE

 

CARBURETION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOLENOID

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ENGINE RUNS O.K. NOW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BAD

 

STOP TESTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REPAIR OR REPLACE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BAD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GOOD

ADJUST, REPAIR OR

REPLACE AS

NECESSARY

GOOD

TEST 40 – TEST CHOKE HEATER

TEST 32 – CHECK

VALVE

ADJUSTMENT

BAD

ADJUST VALVES

GOOD

CHECK

 

 

FLYWHEEL KEY

 

 

 

GOOD

– SEE TEST 31

 

 

 

ON PAGE 57

 

 

 

 

 

 

 

REPAIR OR REPLACE

AS NECESSARY

TEST 35 – CHECK

ENGINE / CYLINDER LEAK DOWN TEST / COMPRESSION TEST

BAD

Page 32

Page 34
Image 34
Generac Power Systems 5414, 5412, 5411, 5413, 5415, 5410 manual Problem 8 Engine Starts Hard and Runs Rough Gasoline Units

5410, 5414, 5415, 5413, 5411 specifications

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