Protek Samurai 321B Instruction Manual - page 4
Model engine fuel is poisonous. Do not allow it to come into contact with the
eyes or mouth. Always store fuel in a clearly marked container and out of the
reach of children.
Model engine fuel is highly flammable. Keep it away from open flames,
excessive heat, sources of sparks, or anything else that could ignite it. Do
not smoke or allow anyone else to smoke near it.
Model engine exhaust, like automobile engine exhaust, contains deadly
carbon-monoxide. Never operate your engine in an enclosed space. Run
your engine only in an open, well ventilated area.
Model engines generate considerable heat. Do not touch any part of your
engine until it has cooled. Contact with the exhaust system or cylinder head
may result in a serious burn.
W A R N I N G S
01
34
Piston
Cylinder Liner
Crankshaft
Near TDC
Slight taper
When the engine is cold.
When the engine is hot.
Low Speed Needle
(Metering Needle)
Idle Screw
(Throttle Stop Screw)
Mid Needle
(Mixture Control Valve)
High Speed
Needle
(Needle Valve)
Thermo Insulator
Carburetor Restrictor (Venturi)
Ball Link
Slide Boot
Exhaust
Gasket
Glowplug
Retaining Screw
O-Ring
O-Ring
Do not allow
bottom of crankcase
to touch chassis
Chamfer inside edges of bearers
Rotate the retainer
nut gently until it stops
Tighten a further
120º - 180º
High Speed
Needle
Open
Close
approx 0.5mm
Element glows when energized
Pliers
Replace the plug when the
element does not glow or is
burnt out.
Glow Plug Igniter
Turn the high speed needle clockwise
until it stops. This is the fully closed
position. Do not force it to turn further.
Approx. 0.5mm open
factory setting with the
restrictor removed.
Fuel
Fuel Tank Side
approx 1mm
Deliver fuel to the carburetor High speed needle position when
starting the engine.
Needle
30º
Close the high speed
needle approximately
30° as needed. This
procedure will be repeated
several times throughout
the break-in process.
Idle Screw
High Speed Needle
Low Speed Needle
Open
Close
Close
Open
HIGH SPEED NEEDLE
LOW SPEED NEEDLE
More fuel
Less fuel
More fuel
Less fuel
Mid Needle
Carburetor Body
Slide Valve
Carburetor Body
Low Speed Needle
Rotate the low speed needle until the head
sticks out 0.5mm from the ball link body.
This is the standard position.
Ball Link
First rotate the mid needle until its slotted
head is flush with the carburetor body. This is the
standard position.
5.5 turns out. Make adjustments with the slide in the open position.
2¾ turns out. Make adjustments with the slide in the open position!
Dirt and dust may lodge in marked places
7
8
Piston
Cylinder Liner
Crankshaft
Near TDC
Slight taper
When the engine is cold.
When the engine is hot.
Low Speed Needle
(Metering Needle)
Idle Screw
(Throttle Stop Screw)
Mid Needle
(Mixture Control Valve)
High Speed
Needle
(Needle Valve)
Thermo Insulator
Carburetor Restrictor (Venturi)
Ball Link
Slide Boot
Exhaust
Gasket
Glowplug
Retaining Screw
O-Ring
O-Ring
Do not allow
bottom of crankcase
to touch chassis
Chamfer inside edges of bearers
Rotate the retainer
nut gently until it stops
Tighten a further
120º - 180º
High Speed
Needle
Open
Close
approx 0.5mm
Element glows when energized
Pliers
Replace the plug when the
element does not glow or is
burnt out.
Glow Plug Igniter
Turn the high speed needle clockwise
until it stops. This is the fully closed
position. Do not force it to turn further.
Approx. 0.5mm open
factory setting with the
restrictor removed.
Fuel
Fuel Tank Side
approx 1mm
Deliver fuel to the carburetor High speed needle position when
starting the engine.
Needle
30º
Close the high speed
needle approximately
30° as needed. This
procedure will be repeated
several times throughout
the break-in process.
Idle Screw
High Speed Needle
Low Speed Needle
Open
Close
Close
Open
HIGH SPEED NEEDLE
LOW SPEED NEEDLE
More fuel
Less fuel
More fuel
Less fuel
Mid Needle
Carburetor Body
Slide Valve
Carburetor Body
Low Speed Needle
Rotate the low speed needle until the head
sticks out 0.5mm from the ball link body.
This is the standard position.
Ball Link
First rotate the mid needle until its slotted
head is flush with the carburetor body. This is the
standard position.
5.5 turns out. Make adjustments with the slide in the open position.
2¾ turns out. Make adjustments with the slide in the open position!
Dirt and dust may lodge in marked places
7
8
Piston
Cylinder Liner
Crankshaft
Near TDC
Slight taper
When the engine is cold.
When the engine is hot.
Low Speed Needle
(Metering Needle)
Idle Screw
(Throttle Stop Screw)
Mid Needle
(Mixture Control Valve)
High Speed
Needle
(Needle Valve)
Thermo Insulator
Carburetor Restrictor (Venturi)
Ball Link
Slide Boot
Exhaust
Gasket
Glowplug
Retaining Screw
O-Ring
O-Ring
Do not allow
bottom of crankcase
to touch chassis
Chamfer inside edges of bearers
Rotate the retainer
nut gently until it stops
Tighten a further
120º - 180º
High Speed
Needle
Open
Close
approx 0.5mm
Element glows when energized
Pliers
Replace the plug when the
element does not glow or is
burnt out.
Glow Plug Igniter
Turn the high speed needle clockwise
until it stops. This is the fully closed
position. Do not force it to turn further.
Approx. 0.5mm open
factory setting with the
restrictor removed.
Fuel
Fuel Tank Side
approx 1mm
Deliver fuel to the carburetor High speed needle position when
starting the engine.
Needle
30º
Close the high speed
needle approximately
30° as needed. This
procedure will be repeated
several times throughout
the break-in process.
Idle Screw
High Speed Needle
Low Speed Needle
Open
Close
Close
Open
HIGH SPEED NEEDLE
LOW SPEED NEEDLE
More fuel
Less fuel
More fuel
Less fuel
Mid Needle
Carburetor Body
Slide Valve
Carburetor Body
Low Speed Needle
Rotate the low speed needle until the head
sticks out 0.5mm from the ball link body.
This is the standard position.
Ball Link
First rotate the mid needle until its slotted
head is flush with the carburetor body. This is the
standard position.
5.5 turns out. Make adjustments with the slide in the open position.
2¾ turns out. Make adjustments with the slide in the open position!
Dirt and dust may lodge in marked places
7
8
Piston
Cylinder Liner
Crankshaft
Near TDC
Slight taper
When the engine is cold.
When the engine is hot.
Low Speed Needle
(Metering Needle)
Idle Screw
(Throttle Stop Screw)
Mid Needle
(Mixture Control Valve)
High Speed
Needle
(Needle Valve)
Thermo Insulator
Carburetor Restrictor (Venturi)
Ball Link
Slide Boot
Exhaust
Gasket
Glowplug
Retaining Screw
O-Ring
O-Ring
Do not allow
bottom of crankcase
to touch chassis
Chamfer inside edges of bearers
Rotate the retainer
nut gently until it stops
Tighten a further
120º - 180º
High Speed
Needle
Open
Close
approx 0.5mm
Element glows when energized
Pliers
Replace the plug when the
element does not glow or is
burnt out.
Glow Plug Igniter
Turn the high speed needle clockwise
until it stops. This is the fully closed
position. Do not force it to turn further.
Approx. 0.5mm open
factory setting with the
restrictor removed.
Fuel
Fuel Tank Side
approx 1mm
Deliver fuel to the carburetor High speed needle position when
starting the engine.
Needle
30º
Close the high speed
needle approximately
30° as needed. This
procedure will be repeated
several times throughout
the break-in process.
Idle Screw
High Speed Needle
Low Speed Needle
Open
Close
Close
Open
HIGH SPEED NEEDLE
LOW SPEED NEEDLE
More fuel
Less fuel
More fuel
Less fuel
Mid Needle
Carburetor Body
Slide Valve
Carburetor Body
Low Speed Needle
Rotate the low speed needle until the head
sticks out 0.5mm from the ball link body.
This is the standard position.
Ball Link
First rotate the mid needle until its slotted
head is flush with the carburetor body. This is the
standard position.
5.5 turns out. Make adjustments with the slide in the open position.
2¾ turns out. Make adjustments with the slide in the open position!
Dirt and dust may lodge in marked places
7
8
S A F E T Y I N S T R U C T I O N S ,
WA R N I N G S & N O T E S
Remember, this engine is not a “toy”! This is an internal combustion engine that has the
potential to damage property, as well as harm you or others if misused. As the owner, you
alone are responsible for the safe operation of this engine. Act with discretion and care at all
times. If the ownership of this engine is transferred to another person, it is the responsibility
of the original owner to provide this manual to the new owner.
The following warnings apply to
ALL MODEL ENGINES and are grouped under two
headings according to the degree of danger and/or damage which could occur due to
misuse or neglect of this product.
These cover events which could
cause serious, and in extreme
circumstances, even fatal injury.
These cover the many other and generally less
obvious sources of danger, but which under certain
circumstances may also cause damage or injury.
W A R N I N G S
N O T E S
3 D D R AW I N G & S P E C I F I C AT I O N S
12
8
9
10
11
M2.6x18
M2.6x7
4
1
3
2
5
6
7
M3x18
1
3
5
6
7
8
S.M3x3
1-1
2
9-2
3-1
5-1
9
10
6-1
7-1
9-1
8-1
Dimensions (mm)
13
Displacement
3.46cc (0.211cu.in.)
Bore
16.6mm (0.654in.)
Stroke
16.0mm (0.630in.)
Practical R.P.M.
3,000 - 40,000 R.P.M.
Power Output
2.5ps / 34,000 R.P.M.
Weight
355g (12.52oz)