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 TM 5-2805-261-13
CHAPTER 3
OPERATOR'S MAINTENANCE INSTRUCTIONS
Section I. LUBRICATION INSTRUCTIONS
3-1. GENERAL LUBRICATION INFORMATION. This
B. FUEL MIXTURE
section contains lubrication instructions for the operator
1 part approved lubricant to 50 parts gasoline.
and a reproduction of the lube oil chart (LO 5-2805-261-
8 fl. ozs. lubricant to 3 gallons of gasoline.
12).
16 fl. ozs. lubricant to 6 gallons of gasoline.
20 millilitres lubricant to 1 litre gasoline.
3-2. ENGINE LUBRICATION. Model AM-40A has a
two cycle engine. It is lubricated by adding oil (TCW
NOTE
50/1) to the gasoline. For proper lubrication of the
Always use fresh gasoline.
engine, 50 parts of gasoline must be mixed with 1 part
of lubricant.
WARNING
Gasoline is extremely flammable
3-3. FUEL MIXING INSTRUCTIONS.
and highly explosive.
Always mix fuel outdoors. Never indoors.
CAUTION
Never smoke or allow open flames or
Lubricant and gasoline must be
sparks when mixing or refueling.
properly mixed or serious damage
Always stop motor before refueling.
will result to the engine.
Always maintain metal-to-metal contact
between the fill can, funnel, and gas tank
CAUTION
when pouring gasoline. (Use a metal
Avoid the use of the following, as they will
funnel for this purpose). This will help
contribute to deterioration of your engine
avoid a static spark which might ignite the
and shorten spark plug life:
gas fumes.
Automotive oils
Premix fuel of unknown oil quality
C. Above 32 (0 ) pour lubricant into tank, add
F
C
Premix fuel richer than 50/1 ratio
gasoline. Replace filler cap securely. To mix
Premix fuel leaner then 50/1 mixture ratio
fuel, tip tank on side and back to upright
position.
A.
RECOMMENDED GASOLINE.
Use gasoline with the following Minimum octane
numbers:
D. Below 32 (0 ) pour approximately one gallon
F
C
ANTI-KNOCK INDEX NUMBER
67
into tank, add required lubricant. Replace filler
Research Octane Number
69
cap securely. Thoroughly mix by shaking tank.
Automotive gasolines, regular-leaded or lead-free,
Add balance of gasoline.
meeting these minimum octane numbers may be used;
however, best results will be obtained by using lead-free
gasoline.
3-1
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