Harbor Freight Tools 68120 Manual De Usuario

Page 16

Horizontal Engines 

        

Air Filter Element Maintenance
1.  Remove the air filter cover and the 

air filter elements and check for dirt. 

Clean or replace as described below.

2. 

•  For “paper” filter elements: 

To prevent injury from dust and debris, 

wear ANSI-approved safety goggles, 

NIOSH-approved dust mask/respirator, and 

heavy-duty work gloves.  In a well-ventilated 

area away from bystanders, use pressurized 

air to blow dust out of the air filter. If this 

does not get the filter clean, replace it.

•  For foam filter elements: 

Wash the element in warm water and 

mild detergent several times. Rinse. 

Squeeze out excess water and allow it to dry 

completely.  Soak the filter in lightweight oil 

briefly, then squeeze out the excess oil.

3.  Install the new filter or the cleaned filter.  

Secure the Air Cleaner Cover before use.

1. 

Disconnect spark plug cap from end of plug.  

Clean out debris from around spark plug.

2.  Using a spark plug wrench, remove the spark plug.
3.  Inspect the spark plug: 

If the electrode is oily, clean it using a clean, dry 

rag. If the electrode has deposits on it, polish it 

using emery paper. If the white insulator is cracked 

or chipped, the spark plug needs to be replaced.

NGK

®

BP-6ES

NHSP

® / 

TORCH

®

F6TC

F6TC

F6TC

NOTICE: Using an incorrect spark 

plug may damage the engine.
4.  When installing a new spark plug, adjust the 

plug’s gap to the specification on the Technical 

Specifications chart.  Do not pry against the 

electrode, the spark plug can be damaged.

5.  Install the new spark plug or the cleaned spark plug 

into the engine.  Gasket-style:  Finger-tighten until the 

gasket contacts the cylinder head, then tighten about 

1/2-2/3 turn more. 

Non-gasket-style: Finger-tighten until the plug 

contacts the head, then tighten about 1/16 turn more.

NOTICE: Tighten the spark plug properly.  

If loose, the spark plug will cause the engine 

to overheat.  If overtightened, the threads 

in the engine block will be damaged.
6.  Apply dielectric spark plug boot protector 

(not included) to the end of the spark 

plug and reattach the wire securely.