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24:1 FUEL MIXTURE CHART ALL TC ENGINES
NOTE: DO NOT MIX FUEL IN ENGINE OR
EQUIPMENT FUEL TANK.
U.S. METRIC
Gas Oil To Be Added Petrol Oil To Be Added
1/2 Gal. 3.00 oz. 2 Liters 83 ml.
1 Gal. 6.00 oz. 4 Liters 167 ml.
2 Gal. 11.00 oz. 8 Liters 333 ml.
MIXING OIL AND GASOLINE PROCEDURE
1. Fill approved, clean container one quarter full with
the recommended gasoline.
2. Add the recommended amount of oil to the
gasoline.
3. Secure the cap on the container and shake the
container vigorously.
4. Remove the cap, add the remainder of the gasoline,
secure the cap, re-mix. The fuel is ready to use.
FUEL REQUIREMENTS
Tecumseh Products 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, 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, gasoline
additives, or white gas because engine/fuel system
damage could result.
See “STORAGE” instructions in Technician’s Manual,
Operator’s Manual, or Bulletin 111.
For year round fuel stability in and out of season, use
Tecumseh's fuel stabilizer part number 730245.
FUEL ADDITIVES
Only fuel additives such as Tecumseh's fuel stabilizer part number 730245 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.
TUNE-UP PROCEDURE
The following is a minor tune-up procedure. If the engine does not perform properly after the tune up is completed,
consult the "Troubleshooting Engine Operation Chart" found in Chapter 7. Repair procedures are listed in each chapter.
CAUTION: REMOVE THE SPARK PLUG WIRE BEFORE DOING ANY SERVICE WORK ON THE ENGINE.
1. Service or replace the air cleaner as necessary. Use the applicable procedure found in Chapter 2 under "Service".
2. Remove the fuel from the fuel tank by running the engine until stopping or draining into an approved fuel container.
3. Remove the fuel tank and blower housing to clean all debris from the air intake screen, cylinder cooling fins,
governor and carburetor linkage.
4. Replace the blower housing and check all remote linkage for proper adjustment and operation.
5. Check to see that the engine is properly secured to the equipment. On rotary lawnmowers, balance the blade
and check the blade hub and crankshaft key for wear. Replace as necessary. Torque the bolts to the correct
specification.
6. Replace the spark plug with the correct replacement by using the Master Technician's Parts Manual. Set the
spark plug gap at .030" (.762 mm) and install it in the engine. Tighten the spark plug to 230 inch pounds (2.6 Nm)
of torque. If a torque wrench isn't available, screw the spark plug in as far as possible by hand. Use a spark plug
socket or wrench to turn the spark plug 1/8 to 1/4 turn further if using the old spark plug, or 1/2 turn further if a
new spark plug is used. Reinstall the spark plug wire.
1-4
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