Central Pneumatic 67853, Manual

Page 14

For Engine technical questions, please call 1-800-520-0882.

Horizontal Engines

Checking and Filling Fuel

WARNING!

TO PREVENT SERIOUS 

INJURY FROM FIRE:

Fill the fuel tank in a well-ventilated area away 

from ignition sources.  If the engine is hot from 

use, shut the engine off and wait for it to cool 

before adding fuel. Do not smoke. 

1.  Clean the Fuel Cap and the area around it.
2. 

Unscrew and remove the Fuel Cap.

3. 

If needed, fill the Fuel Tank to about 1 inch under 

the fill neck of the Fuel Tank with 87 octane or 

higher unleaded gasoline. For the 68121, fill to the 

bottom of the fuel strainer ONLY, see below.

68121 Max Fuel

DO NOT OVERFILL!

WARNING!  TO PREVENT FUEL LEAKAGE AND 

FIRE HAZARD,

 do not fill fuel above the bottom 

of fuel strainer for the 68121, 212cc engine.
Note:

Do not use gasoline containing more than 

10% ethanol (E10).  Do not use E85 ethanol.
Note:  Do not use gasoline that has been stored in 

a metal fuel container or a dirty fuel container.  It 

can cause particles to enter the carburetor, affecting 

engine performance and/or causing damage.

4.  Then replace the Fuel Cap.
5.  Wipe up any spilled fuel and allow excess to evaporate 

before starting engine. To prevent FIRE, do not start 

the engine while the smell of fuel hangs in the air.

Engine Oil Change

CAUTION!

  Oil is very hot during operation and can 

cause burns.  Wait for engine to cool before changing oil.
1.  Make sure the engine is stopped and is level.
2.  Close the Fuel Valve.
3.  Place a drain pan (not included) underneath 

the crankcase’s drain plug.

4.  Remove the drain plug and, if possible, 

tilt the crankcase slightly to help drain 

the oil out.  Recycle used oil.

5.  Replace the drain plug and tighten it.
6.  Clean the top of the Dipstick and the area around it.  

Remove the Dipstick by threading it counterclockwise, 

and wipe it off with a clean lint free rag.

7. 

Full level

Full level

Add the appropriate type of oil until the oil level is at 

the full level.  SAE 10W-30 oil is recommended for 

general use.  

The SAE Viscosity Grade chart shows other 

viscosities to use in different average temperatures.

10W-30

30

5W-30

-20

0

20

40

60

80

100°F

SAE Viscosity Grades

Average outdoor temperature

8.  Thread the dipstick back in clockwise.

CAUTION!

  Do not run the engine with too little 

oil.  The engine will be permanently damaged.

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. 

Cleaning:

•  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.