Fuel Requirements - Tecumseh TM SERIES Technician's Handbook

FUEL REQUIREMENTS

Tecumseh Power Company strongly recommends the use of fresh, clean, unleaded regular gasoline in all Tecumseh
engines. Unleaded gasoline burns cleaner, extends engine life, and promotes good starting by reducing the build-up of
combustion chamber deposits. Leaded gasoline, gasohol containing no more than 10% ethanol, premium gasoline, or
unleaded gasoline containing no more than 15% MTBE (Methyl Tertiary Butyl Ether), 15% ETBE (Ethyl Tertiary Butyl
Ether) or 10% ethanol, can be used if unleaded regular gasoline is not available.
Reformulated gasoline that is now required in several areas of the United States is also acceptable.
NEVER USE: gasoline, fuel conditioners, additives or stabilizers containing methanol. The use of white gas, gasohol
containing more than 10% ethanol, unleaded regular gasoline containing more than 15% MTBE (Methyl Tertiary Butyl
Ether), 15% ETBE (Ethyl Tertiary Butyl Ether) or 10% ethanol is not recommended as engine/fuel system damage could
result.
See "STORAGE" instructions in Technician's Manual, Operator's Manual, or Bulletin 111.
Tecumseh two-cycle oil part # 730227C contains a fuel stabilizer for year round fuel stability in and out of season. If oil
other than Tecumseh two cycle is used, use Tecumseh's fuel stabilizer part # 730245.
MIXING FUEL AND OIL
NEVER store engine with fuel in
WARNING
fuel tank inside a building with
potential sources of ignition such as hot water and space
heaters, clothes dryers, electric motors, etc.
DO NOT mix fuel and oil directly in fuel tank.
Use of NMMA, TC-WII or TC-W3, JASO FB or JASO FC
classified oil is recommended.
1. Be sure container is outdoors and in a well-ventilated
area.
2. Fill approved clean red GASOLINE container with 1/4
of recommended fuel amount. See Table 1-4 and
Table 1-5.
3. Add required amount of recommended oil to fuel.
See Table 1-4.
4. Screw cap onto container.
5. Shake container vigorously.
6. Unscrew cap from container.
7. Fill container with remainder of recommended fuel.
See Table 1-4 and Table 1-5.
8. Wipe away any spilled fuel or oil.
FUEL ADDITIVES
Only fuel additives such as Tecumseh's fuel stabilizer part # 730245A or liquid varieties can be used when mixed
properly. For winter applications, Isopropyl alcohol fuel dryers may be used in the fuel system but must be mixed at
the proper ratio recommended by the manufacturer. NEVER USE METHANOL BASED DRYERS.
Gasoline and oil containers must be clean, covered, and rust-free. Old gas or fuel contamination can restrict or block
fuel filters, and small fuel ports and passages in the carburetor. If the engine is to be unused for 30 days or more see
"Storage" for fuel system instructions.
6
Table 1-4. Fuel Mix Chart — Mixture Ratio 24:1
U.S.
Gas Oil
1 Gal. 5 oz.
2 Gal. 11 oz.
5 Gal. 27 oz.
Table 1-5. Recommended Fuel
Fuel Component
Ethanol
Grain Alcohol ("Gasohol")
MTBE (Methyl Tertiary Butyl Ether)
ETBE (Ethyl Tertiary Butyl Ether)
S.I. Metric
Petrol Oil
4 Liters 167 ml
8 Liters 333 ml
20 Liters 833 ml
Percentage
10%
10%
15%
15%