Harbor Freight Tools 420 cc 사용자 설명서

Page 18

Horizontal Engines 

        

Engine will not start FUEL RELATED:

1.  No fuel in tank or fuel valve closed.
2.  Choke not in CHOKE position, cold engine.
3.  Gasoline with more than 10% ethanol 

used. (E15, E20, E85, etc.) 

 

 

 

4.  Low quality or deteriorated, old gasoline. 

 

5.  Carburetor not primed.
6.  Dirty fuel passageways. 

 

7.  Carburetor needle stuck.  

Fuel can be smelled in the air.

8.  Too much fuel in chamber. This can be 

caused by the carburetor needle sticking. 

 

 

9.  Clogged Fuel Filter.

FUEL RELATED:
1.  Fill fuel tank and open fuel valve.
2.  Move Choke to CHOKE position.
3.  Clean out ethanol rich gasoline from fuel 

system.  Replace components damaged 

by ethanol.  Use fresh 87+ octane 

unleaded gasoline only. 

4.  Use fresh 87+ octane unleaded gasoline.

5.  Pull on Starter Handle to prime.
6.  Clean out passageways using 

fuel additive.  Heavy deposits 

may require further cleaning.

7. 

Gently tap side of carburetor float 

chamber with screwdriver handle.

8.  Turn Choke to RUN position.  

Remove spark plug and pull the start 

handle several times to air out the 

chamber.  Reinstall spark plug and 

set Choke to CHOKE position.

9.  Replace Fuel Filter.

IGNITION (SPARK) RELATED:
1.  Spark plug cap not connected securely.
2.  Spark plug electrode wet or dirty.
3.  Incorrect spark plug gap.
4.  Spark plug cap broken.
5.  Circuit breaker tripped 

(electric start models only).

6.  Incorrect spark timing or 

faulty ignition system.

IGNITION (SPARK) RELATED:
1.  Connect spark plug cap properly.
2.  Clean spark plug.
3.  Correct spark plug gap.
4.  Replace spark plug cap.
5.  Reset circuit breaker.  Check wiring and 

starter motor if breaker continues to trip.

6.  Have qualified technician diagnose/

repair ignition system.

COMPRESSION RELATED:
1.  Cylinder not lubricated.  Problem after long 

storage periods. 

2.  Loose or broken spark plug.  (Hissing 

noise will occur when trying to start.) 

3.  Loose cylinder head or damaged 

head gasket.  (Hissing noise will 

occur when trying to start.)

4.  Engine valves or tappets 

mis-adjusted or stuck.

COMPRESSION RELATED:
1.  Pour tablespoon of oil into spark 

plug hole.  Crank engine a few 

times and try to start again.

2.  Tighten spark plug.  If that does not work, 

replace spark plug.  If problem persists, 

may have head gasket problem, see #3.

3.  Tighten head.  If that does not remedy 

problem, replace head gasket. 

4.  Have qualified technician diagnose/

repair ignition system.