O.S. engine MAX FXi 46 Owner's Instruction Manual page 5

your hearing. Such noise is also likely to
cause annoyance to others over a
wide area.
• If you remove the glow plug from the
engine and check its condition by
connecting the battery leads to it, do not
hold the plug with bare fingers. Use an
appropriate tool or a folded piece of cloth.
• Install a top-quality propeller of the
diameter and pitch specified for the
engine and aircraft. Locate the propeller
on the shaft so that the curved face of the
blades face forward–i.e. in the direction of
flight. Firmly tighten the propeller nut,
using the correct size wrench.
• Always check the tightness of the
propeller nut and retighten it, if
necessary, before restarting the engine,
particularly in the case of four-stroke
engines. If a safety locknut assembly is
provided with your engine, always use
it. This will prevent the propeller from
flying off in the event of a "backfire",
even if it loosens.
• If you fit a spinner, make sure that it is a
precision made product and that the
slots for the propeller blades do not cut
into the blade roots and weaken them.
• Preferably, use an electric starter. The
wearing of safety glasses is also
strongly recommended.
• Discard any propeller which has
become split, cracked, nicked or
otherwise rendered unsafe. Never
attempt to repair such a propeller,
destroy it. Do not modify a propeller in
any way, unless you are highly
experienced in tuning propellers for
specialized competition work such as
pylon racing.
• Take care that the glow plug clip or battery
leads do not come into contact with the
propeller. Also check the linkage to the
throttle arm. A disconnected linkage could
also foul the propeller.
5