Troy-Bilt 12235, Owner'S Manual

6

NOTE: Do not use gasoline containing methanol (wood al-
cohol). Fuel containing up to 10% ethanol (gasohol) or up to
15% MTBE (Methyl Tertiary Butyl Ether) may be used, but re-
quires special care when the engine is not used for extended
periods.  See “STORAGE” instructions in Engine Owner’s
Manual for additional information.

3. The fuel/oil mix ratio is 24:1 with the use of a NMMA clas-
sified oil. For new engines, use twice the normal oil quantity
for the first gallon of fuel.  NOTE: Due to differences in fuel and
oil availability worldwide, Tecumseh recommends a 16:1 mix
ratio if NMMA oil is not available.

4. Do not mix fuel directly in engine fuel tank. Always use a
clean, safety-approved fuel container.

• To Mix: 

A. Fill a clean, approved container one quarter full with rec-

ommended gasoline.  

B. Add recommended amount of oil per Chart 1: FUEL

MIXTURE.

C. Screw cap on container and shake vigorously.  Then un-

screw cap and fill container with gasoline per 
Chart 1: FUEL MIXTURE.  Screw on cap and shake again.
Once mixed, oil and gasoline will not separate.

• To Fill Fuel Tank:

A. Engine must be cool. Clean area around fuel tank cap and

remove cap.  Insert a clean funnel into the fuel tank.

B. Slowly pour gasoline/oil mixture into fuel tank.  Fill tank no

higher than 1/2" from top of tank to allow for gasoline ex-
pansion.  Install fuel cap and clean up any fuel spills.

Section 2:  Assembly

Chart 1:  FUEL MIXTURE 

(Mixture Ratio is 24 parts gasoline to 

1 part two-cycle oil)

U.S. 

Gas

U.S. 

Oil

1 Gal.

5 oz.

2 Gal.

11 oz.

Metric Petrol

Metric Oil

4 liters

167 ml

8 liters

333 ml