Generac Power Systems 5414, 5412 Problem 8 - Engine Starts Hard and Runs Rough Gasoline Units

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