Protek Samurai 321B Instruction Manual page 18

Needle
(Needle Valve)
Mid Needle
(Mixture Control Valve)
E N G I N E I N S TA L L AT I O N
Make sure that the vehicles engine mount surfaces are level, and on the same plane.
Poor installation may cause distortion of the crankcase, bearings, etc, resulting in erratic
performance and permanent damage.
The recommended screws for securing the engine are Allen head, hexagon socket type 3mm
or 4-40 steel screws.
If existing holes in the engine mount do not align perfectly with the engine mounting lugs in
the crankcase, enlarge the holes in the lugs slightly with a needle file so that the screws are
perfectly aligned with the engine mount holes.
Thermo Insulator
arked places
Chamfer inside edges of bearers
• Do not allow the bottom of the crankcase to touch the chassis.
Ball Link
• If needed, chamfer the inside edges of the engine mounts for clearance.
Rotate the low speed needle until the head
sticks out 0.5mm from the ball link body.
This is the standard position.
Low Speed Needle
5.5 turns out. Make adjustments with the slide in the open position.
First rotate the mid needle until its slotted
head is ush with the carburetor body. This is the
15
standard position.
Slide Boot
Idle Screw
(Throttle Stop Screw)
Ball Link
Low Speed Needle
(Metering Needle)
Do not allow
bottom of crankcase
to touch chassis
Glow Plug Igniter
Deliver fuel to the carburetor
Fuel Tank Side
Fuel
NOTE: In the event that you replace any of the major engine components (piston,
sleeve, con rod, crankshaft or bearings), a brief break-in should be performed. If you
change to a fuel with higher nitro content, the engine will need to be re-tuned.
H O W T O S T O P T H E E N G I N E
To stop the engine during normal operation, reduce the throttle to neutral, flip the car over
and push a blunt rubber object against the flywheel. DO NOT use your fingers!
Do not touch rotating parts, the engine, or the tuned pipe; these components get
extremely hot and contact with them may result in a serious burn or other injury.
High speed needle position when
starting the engine.
Close the high speed
30º
needle approximately
Needle
30° as needed. This
procedure will be repeated
several times throughout
the break-in process.
W A R N I N G !
Idle Screw
HIGH SPEED NEEDLE
Open Close
More fuel Less fuel
20