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ENGINE CARE
SHORT BLOCKS
New short blocks are identified by a tag marked S.B.H.
(Short Block Horizontal) or S.B.V. (Short Block Vertical).
Original model identification numbers of an engine
should always be transferred to a new short block
for correct parts identification.
THIS SYMBOL POINTS OUT IMPORTANT
SAFETY INSTRUCTIONS WHICH IF NOT
FOLLOWED COULD ENDANGER THE
PERSONAL SAFETY OF YOURSELF AND
OTHERS. FOLLOW ALL INSTRUCTIONS.
ENGINE FUEL MIX
U.S. U.S. METRIC METRIC
Amount of Oil Amount of Oil
Gasoline To Be Added Petrol To Be Added
24:1 1 Gallon 5.3 oz. 4 Liters 167 ml
2 Gallons 10.7 oz. 8 Liters 333 ml
32:1 1 Gallon 4 oz. 4 Liters 125 ml
2 Gallons 8 oz. 8 Liters 250 ml
50:1 1 Gallon 2.5 oz. 4 Liters 80 ml
2 Gallons 5.0 oz. 8 Liters 160 ml
FUELS. 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 carbon deposits.
Premium gas or gasohol containing no more than 10%
ethanol can be used if unleaded fuel is not available.
NOTE: NEVER USE GASOLINE CONTAINING
METHANOL, GASOHOL CONTAINING MORE THAN
10% ETHANOL, UNLEADED REGULAR GASOLINE
CONTAINING MORE THAN 15% M.T.B.E. OR ETBE,
GASOLINE ADDITIVES, OR WHITE GAS BECAUSE
ENGINE/FUEL SYSTEM DAMAGE COULD RESULT.
NOTE: In countries where unleaded gasoline is not
available, regular gas can be used.
Make sure that gasoline and oil are stored in clean,
covered, rust free containers. Dirt in fuel can clog
small ports and passages in the carburetor. Use fresh
gasoline only. Gasoline standing for long periods of
time develop a gum that will result in fouled spark
plugs, clogged fuel lines, carburetors and fuel screens.
SHORT BLOCK IDENTIFICATION TAG
SBV-2316
SER 4291
SERIAL NUMBER
SBV OR SBH IDENTIFICATION NUMBER
Using fuel that is not fresh will cause engines to be
hard starting, especially in cold temperatures.
Clean gas cap, tank and fuel container spout when
filling fuel tank, to assure that dirt will not get into
fuel system.
If gasohol is used, special care is required when the
engine is to be stored for extended periods.
ENGINE OIL. Use Clean, high quality 2 CYCLE OIL.
NMMA TC-WII, or TC-W3.
FUEL/OIL MIX. Follow fuel and engine oil requirements
listed in the Owners Manual. Disregard conflicting
instructions found on oil containers.
NOTE: Sears Craftsman models use a 40:1 mix which
is acceptable.
NOTE: ALWAYS DOUBLE THE AMOUNT OF OIL FOR
THE FIRST GALLON OF MIX FOR ENGINE BREAK
IN.
To assure thorough mixing of oil and gasoline, fill
container with gasoline to one quarter full, add oil as
recommended, shake container vigorously and then
add remainder of gasoline. Do not mix directly in
engine or equipment fuel tank.
TWO-CYCLE FUEL/OIL MIX RATIOS
24:1
AV520 All Basic Specifications 670 & 653
AV600 All Basic Specifications 600-10 & Up
32:1
TVS600 All Specifications
AH600
50:1
HSK600
STORAGE:
NEVER STORE ENGINE WITH FUEL IN TANK
INDOORS OR IN ENCLOSED, POORLY
VENTILATED ENCLOSURES WHERE FUEL
FUMES MAY REACH AN OPEN FLAME, SPARK
OR PILOT LIGHT AS ON A FURNACE, WATER
HEATER, CLOTHES DRYER, ETC.
If engine is to be stored over 30 days, prepare for
storage as follows:
1. Remove all gasoline from fuel tank to prevent gum
deposits from forming in tank and other fuel system
components, causing possible malfunction of the
engine.
DRAIN FUEL INTO APPROVED CONTAINER
OUTDOORS, AWAY FROM OPEN FLAMES.
Run engine until fuel tank is empty and engine
stops due to lack of fuel.
Fuel stabilizer (such as Tecumseh's Part No.
730245) is an acceptable alternative in minimizing
the formation of fuel gum deposits during storage.
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