O.S. Engines 46FX-H Ring - Manual (Page 9)

BEFORE STARTING
Tools, accessories, etc.
The following items are necessary for operating the
engine.
1 Fuel
Model glowplug engine fuel of good quality, preferably
containing a small percentage of nitromethane.
INSTALLATION OF COOLING FAN
As supplied the MAX-46FX-H is equipped with a
conventional drive hub, keyed to flats on each side of
the crankshaft. However, some helicopters require
this to be replaced by a taper collet for cooling fan
installation. Fit this as follows. Rotate crankshaft to
TDC. Remove drive hub and thrust washer. Slide
taper collet onto 3/8-in. dia. front journal with its slot
uppermost-i.e.along the full diameter of the journal
NOT passing over the gap formed either side of the
flats. It is not necessary to replace the thrust washer.
Open slot in taper collet
Flats each side of
crankshaft front journal
for drive hub.
Front Journal
Split Taper Collet
3 Glowplug battery
The power source for heating the glowplug may be
either a large heavy-duty 1.5volt dry cell, or preferably,
a 2-volt rechargeable lead-acid cell .
1.5 volt heavy-duty
dry battery or 2 volt rechargeable
lead-acid cell (at least 5Ah)
If a 2-volt cell is employed,
use a resistance wire, as
shown, to reduce applied
voltage, otherwise element
will overheat and burn out.
2 Glowplug
O.S. No.8 glowplug is installed in the engine.
8