10.
INSTALLATION
Engine life, ease
of
maintenance and inspection, frequency of checks and repairs, and operating cost all depend on the way
in whlch the engine is installed. Carefully observe the following instructions for installing the engine.
10-1
INSTALLING
When mounting the engine, carefully examine its position, the method
of
connecting it to
a
load (machine), the foundation,
and the method of supporting the engine.
When determining its mounting position, in particular, make sure that gasoline and oil can easily be supplied and checked, the
spark plug and breaker can easily be checked, the air cleaner can easily be serviced, and that the oil can easily be discharged.
10-2
VENTILATION
Fresh air is necessary for cooling the engine and burning the fuel.
In cases where the engine is operated under a hood or in a small room, temperature rise in the engine room can cause vapor
lock,
oil
deterioration, increased
oil
consumption,loss,of power, piston seizure, shorter engine life, etc., making it impossible
to operate the engine properly.
It
is necessary, therefore, to provide a duct or baffle to guide cooling air to the engine to
prevent recirculation of the hot
air
used for engine cooling, and temperature rise of the load (machine).
Take steps as necessary to keep the engine room temperature below 50°C even in the hottest period of the year.
10-3
EXHAUST GAS DISCHARGE
Exhaust gas is
noxious.
When
operating the engine indoors, be sure to discharge the exhaust gas outdoors. If a
long
exhaust
pipe is used in such a case, the internal resistance increases causing loss of engine power. Thus pipe inside diameter must
in-
crease in proportion to exhaust pipe length.
*
Exhaust pipe:
Less
than
3
m long, pipe inside diameter
30
mm,
Less
than
5
m
long, pipe inside diameter
33
mm.
*
Put safety covers over the exhaust pipe, muffler, etc.
10-4
FUEL
STSTEM
If the fuel tank
is
removed from the engine
in
mounting the engine in a machine, install the fuel tank back
so
its bottom is
5
cm to
50
cm above the fuel joint of the carburetor.
If
the fuel
tank
is installed
too
low, the fuel will not
be
supplied. If
the fuel tank is too
high,
on
the other hand, it can cause the carburetor to overflow.
Be careful of heat conduction, pipe size, bends, and leaks from the joints in piping and make the fuel pipe as short as possible
to prevent air and vapor from being trapped. The standard fuel pipe diameter is
4
to
5
mm.
10-5
POWER
TRANSMISSION
to
DRIVEN
MACHINES
10-5-1
BELT
DRIVE
Take the following notes into consideration.
*
V-belts are preferable to flat belts.
*
The driving shaft of the engine must be parallel to the driven shaft of the load.
*
The driving pulley of the engine must be
in
line with the driven pulley
of
the load.
*
Install the engine pulley as close to the engine as possible.
*
If
possible, span the belt horizontally.
*
Disengage the load when starting the engine.
If
no
clutch is used, use a belt tension pulley or the like.
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33
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