21TM-T .21 Engine - Manual

CARE AND MAINTENANCE
1.
2.
3.
The minute particles of foreign matter, that are present in
any fuel may, by accumulating and partially obstructing
fuel flow, cause engine performance to become erratic
and unreliable.
O.S. 'Super-Filters' (large and small) are available, as
optional extras, to deal with this problem.
One of these filters installed to the pickup tube inside
your refueling container, will prevent the entry of foreign
material into the fuel tank. It is also recommended that a
good in-line filter be installed between the tank and
carburetor.
Do not forget to clean the filters regularly to remove
dirt and lint that accumulate on the filter screens.
Also, clean the carburetor itself occasionally.
At the end of each operating session, drain out any fuel
that may remain in the fuel tank. Afterwards,energize
the glow-plug and try to restart the engine, to burn off
any fuel that may remain inside the engine. Repeat this
procedure until the engine fails to fire. Do this while the
engine is still warm.
4.
Then, inject some after-run oil into the engine, and
rotate the engine with an electric starter for 4 to 5
seconds to distribute the oil to all the working parts.
Note:
Dirt and dust may lodge in marked places.
5.
Finally, when cleaning the exterior of the engine, use
methanol or a household cleaning agent.
Do not use gasoline, kerosene, or any petroleum
based chemical which can damage silicone fuel
tubing.
CHECKING THE ENGINE
If the engine will not develop normal performance after
long time running due to wearing of parts. It is suggested
to replace necessary parts when the following symptoms
are detected.
Engine sound changes and easily overheats.
Power has dropped extremely.
Idle is unstable and/or engine tends to stop at idle.
In most cases, ball bearings, cylinder & piston assembly,
connecting rod and/or crankcase have become worn.
Check the parts carefully and replace them if necessary.
O.S. GENUINE PARTS & ACCESSORIES
71410150
71410200
71410250
71410300
71411200
71411250
71412300
71413550
71413600
71413700
O.S. SPEED HEX WRENCH DRIVER 1.5
O.S. SPEED HEX WRENCH DRIVER 2.0
O.S. SPEED HEX WRENCH DRIVER 2.5
O.S. SPEED HEX WRENCH DRIVER 3.0
O.S. SPEED HEX BALL WRENCH DRIVER 2.0
O.S. SPEED HEX BALL WRENCH DRIVER 2.5
O.S. SPEED FLAT HEAD SCREWDRIVER 3.0
O.S. SPEED NUT DRIVER 5.5
O.S. SPEED NUT DRIVER 6.0
O.S. SPEED NUT DRIVER 7.0
O.S. SPEED DRIVER TOOLS
Code No.
Description
71414015
71414020
71414025
71414030
71414120
71414125
71414230
71414355
71414360
71414370
O.S. SPEED HEX WRENCH TIP ONLY 1.5
O.S. SPEED HEX WRENCH TIP ONLY 2.0
O.S. SPEED HEX WRENCH TIP ONLY 2.5
O.S. SPEED HEX WRENCH TIP ONLY 3.0
O.S. SPEED HEX BALL WRENCH TIP ONLY 2.0
O.S. SPEED HEX BALL WRENCH TIP ONLY 2.5
O.S. SPEED FLAT HEAD SCREWDRIVER TIP 3.0
O.S. SPEED NUT DRIVER TIP ONLY 5.5
O.S. SPEED NUT DRIVER TIP ONLY 6.0
O.S. SPEED NUT DRIVER TIP ONLY 7.0
Code No. Description
The specifications are subject to alteration for improvement without notice.
O.S. GLOW PLUG
(71520100)
(71415100)
(71415200)
(71415300)
O.S. SPEED CLUTCH WRENCH & ADJUSTER
O.S. SPEED FLYWHEEL KEY
O.S. SPEED FLYWHEEL PULLER
O.S. SPEED PLUG WRENCH
http://www.os-engines.co.jp
6-15 3-Chome Imagawa Higashisumiyoshi-ku
Osaka 546-0003, Japan
TEL. [phone]
FAX. [phone]
Dimensions (mm)
THREE VIEW DRAWING
Type of screw
S...Set Screw
Do not inject after-run oil into the carburetor as
this can cause the O rings inside the carburetor to
deteriorate.
Add the oil through the glowplug hole and turn the
engine over several times by hand.
(72106172)
(71653000)
LC3
(22884254)
(72506100)
MANIFOLD SPRING (2pcs.)
2.5mm x 1000mm
O.S. SPEED CILICONE TUBE
O.S. SPEED DUST CAP SET FOR 12-30 CLASS
3mm(2pcs.) / 16mm(2pcs.) / 18mm(1pc.)
(71417100)
No.1
(71417200)
No.2
(71415500)
(71415400)
O.S. SPEED BODY REAMER
O.S. SPEED SPRING REMOVER
O.S. SPEED PHILLIPS SCREW DRIVER
O.S. SPEED PHILLIPS SCREW DRIVER
Displacement
Bore
Stroke
Output
Practical R.P.M.
Weight
(Engine)
SPECIFICATIONS
Copyright 2014 by O.S. Engine Mfg. Co., Ltd. All rights reserved. Printed in JAPAN.
CARBURETOR CLEANLINESS
The correct functioning of the carburetor depends on
its small fuel orifices remaining clear.
REALIGNMENT OF METERING NEEDLE AND
MIXTURE CONTROL VALVE
In the course of making carburetor adjustments, it is
just possible that the Metering Needle and the Mixture
Control Valve may be inadvertently screwed in or out
too far and thereby moved beyond its effective adjustment
range.The basic positions can be found by rotating the
Metering Needle until its slotted head is flush with the
ball link body or throttle lever body.
11K
11K-R
Mixture Control Valve
Carburetor Body
Slide Valve
Carburetor Body
Metering Needle
Rotate the Metering Needle until
its slotted head is flush with the
Throttle Lever body. This is the
standard position.
First rotate the Mixture Control
Valve until its slotted head is flush
with the carburetor body. Then
screw the valve in exactly 0.5 turn.
This is the standard position.
Throttle Lever
Slide Valve
Carburetor Body
Metering Needle
Rotate the Metering Needle until
its slotted head is flush with the
ball link body. This is the standard
position.
Ball Link
When storing the engine, install the cap on the exhaust
port, carburetor, etc. to prevent dust from entering the
engine.
Caution:
The rear crankshaft bearing of this engine uses a
special plastic retainer. If the front housing needs
to be heated to remove or replace the bearing, do
not allow the bearing to exceed 120˚C (248˚F),
otherwise it may be damaged and rendered
unserviceable.
(Optional extra)
INSTALLING DUST CAPS
Type of screw
C…Cap Screw M…Oval Fillister-Head Screw
＊
21TM (T-Maxx) ENGINE EXPLODED VIEW & ENGINE PARTS LIST
C.M3x16
1
2
3
5
4
6
7
8
9
10
11
12
14
13
15
17
M.+M2.6x7
16
C.M3x16
1
2
3
5
4
6
7
8
9
10
11
12
14
13
15
17
M.+M2.6x7
16
S.M3x3
1
1-1
1-2
2
2-1
2-2
3
4
8
9
10
5
6
6-1
7
3-1
S.M3x3
8
1
1-1
1-2
2
2-1
2-2
3
3-1
4
5
6
6-1
7
8
9
10
22615000
22781800
27881820
21982700
21982620
27881820
21285901
21982100
21982210
21982540
21982520
23818430
2AP81950
22781800
21982900
22781800
23818440
79871160
21914200
21921400
21913300
23906000
21817000
21915000
21982000
25381701
23731000
21921020
21931010
21912000
21922000
21921800
21911800
79860070
71653000
21427200
72103800
72106172
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Cylinder Head Retaining Screw (10pcs.)
Heatsink Head
Head Gasket (1pc.)
Cylinder & Piston Assembly
Piston Pin
Piston Pin Retainer (2pcs.)
Connecting Rod
Carburetor Complete (Type 11K)
Carburetor Retainer
Crankshaft Ball Bearing (Front)
Crankcase
Crankshaft Ball Bearing (Rear)
Crankshaft
Starting Shaft
Cover Gasket
Rear Adaptor
Rear Adaptor Retaining Screw (10pcs.)
Glow Plug LC3
Exhaust Seal Ring (2pcs.)
Exhaust Manifold M1020
Manifold Spring (2pcs.)
Description
Code No.
No.
79871160
21914200
21921400
21913300
23906000
21817000
21915000
21982010
25381701
23731000
21921020
21931010
21912000
21922000
21921800
21911800
79860070
71653000
21427200
72103810
72106172
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Cylinder Head Retaining Screw (10pcs.)
Heatsink Head
Head Gasket (1pc.)
Cylinder & Piston Assembly
Piston Pin
Piston Pin Retainer (2pcs.)
Connecting Rod
Carburetor Complete (Type 11K-R)
Carburetor Retainer
Crankshaft Ball Bearing (Front)
Crankcase
Crankshaft Ball Bearing (Rear)
Crankshaft
Starting Shaft
Cover Gasket
Rear Adaptor
Rear Adaptor Retaining Screw (10pcs.)
Glow Plug LC3
Exhaust Seal Ring (2pcs.)
Exhaust Manifold M1021
Manifold Spring (2pcs.)
Description
Code No.
No.
21TM (Revo) ENGINE EXPLODED VIEW & ENGINE PARTS LIST
Type of screw
C…Cap Screw M…Oval Fillister-Head Screw
＊
11K / 11K-R CARBURETOR EXPLODED VIEW &
ENGINE PARTS LIST
Description
Code No.
No.
Carburetor Rubber Gasket
Ball Link No.5
Dust Cover
Metering Needle Assembly
Slide Valve
No.21 Universal Nipple Assembly
Carburetor Body (w/Thermo Insulator)
"O" Ring (2pcs.)
Needle Valve Assembly
Throttle Stop Screw
"O" Ring (S) (2pcs.)
"O" Ring (L) (2pcs.)
Mixture Control Valve Assembly
"O" Ring (S) (2pcs.)
Thermo Insulator
"O" Ring (S) (2pcs.)
Throttle Lever
3.41 cc / 0.208 cu.in.
17.0 mm / 0.669 in.
15.0 mm / 0.590 in.
1.8 ps / 1.77 hp / 29,000 r.p.m.
3,000-35,000 r.p.m.
243g / 8.57 oz.
JAPAN
JAPAN
34.8
26.3
18.8
M7x1
31.4
11
39
4- 3.3
85.3
6
6
25.4
16
(21TM-T & 21TM-R)
60091890 122002