User Manual
2
Remember  that  your  engine  is  not  a  "toy",  but  a  highly  efficient  internal-
combustion  machine  whose  power  is  capable  of  harming  you,  or  others,  if  it  is 
misused. 
As owner, you, alone, are responsible for the safe operation of your engine, so act 
with discretion and care at all times.
If at some future  date, your O.S. engine is acquired by another person,  we  would 
respectfully request that these instructions are also passed on to its new owner.
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE
The advice which follows is grouped under two headings according to the 
degree of damage or danger which might arise through misuse or neglect.
WARNINGS
NOTES
These  cover  events  which 
might  involve  serious  (in 
extreme  circumstances, even 
fatal) injury.
These  cover  the  many  other 
possibilities,  generally  less  obvious 
sources of danger, but which, under 
certain  circumstances,  may  also 
cause damage or injury.
3
WARNINGS
Model engine fuel is poisonous. Do not 
allow it to come into contact with the eyes 
or mouth. Always store it in a 
clearly marked container and 
out of the reach of children.
Never  operate  your  engine  in  an  en-
closed  space.  Model  engines,  like  auto-
mobile  engines,  exhaust  deadly  carbon-
monoxide. Run your engine only in an 
open area.
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.
Never touch, or allow any object to come 
into contact with, the rotating 
propeller and do not  crouch 
over  the  engine  when  it  is 
running.
A  weakened  or  loose  propeller  may 
disintegrate  or  be  thrown  off  and,  since 
propeller  tip  speeds  with  powerful 
engines may exceed 600 feet(180 metres) 
per second, it will be understood that 
such  a failure  could  result  in  serious 
injury, (see 'NOTES' section relating to 
propeller safety).
Model  engine  fuel  is  also  highly 
flammable. Keep it away from open flame, 
excessive  heat,  sources  of  sparks,  or 
anything  else  which  might 
ignite it. Do not smoke or allow 
anyone else to smoke, near to it.










