O.S. Engines FS81-a - Manual (Page 10)

18
The exhaust outlet of the silencer can be rotated
to any desired position in the following manner:
Loosen the locknut and assembly screw.
Set the exhaust outlet at the required posi-
tion by rotating the rear part of the silencer.
Re-tighten the assembly screw, followed by
the locknut. Assembly screw
Baffle
Turn to reguired
position
Exhaust outlet
Locknut
Model engines generate considerable heat.
Do not touch any part of your engine until
it has cooled. Contact with the muffler
(silencer), cylinder head or exhaust header
pipe, in particular, may result in a serious
burn. Keep your hands and face away from
exhaust gas or you will suffer a burn.
Reminder!
1)
2)
3)
"O" Ring
"O" Ring
19
FUEL TANK & LINES
Make sure that the tank is well rinsed out
with methanol or glow fuel before installation
and that the pickup weight is well clear of
the bottom of the tank when held vertically.
Plug (commercially available)
For Pump
Approx. 10mm
Use a suitable length of best quality 5mm
OD x 2mm ID silicone tubing for fuel tubing.
The Fuel line pickup weight should be 10mm
away from the back of the tank.
Suggested fuel tank capacity is approx
320cc. This will allow 14minute flights.
It is suggested to keep the distance between the
carburetor and fuel tank within 500~600mm.
Vent