Table of Contents
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It is of vital importance, before attempting to operate your
engine, to read the general 'SAFETY INSTRUCTIONS
AND WARNINGS' section on pages 2-5 of this booklet
and to strictly adhere to the advice contained therein.
Also, please study the entire contents of this instruction
manual, so as to familiarize yourself with the controls
and other features of the engine.
Keep these instructions in a safe place so that you may
readily refer to them whenever necessary.
It is suggested that any instructions supplied with the
vehicle, radio control equipment, etc., are accessible for
checking at the same time.
ENGINE CONSTRUCTION, NOTES WHEN
ACCESSORIES, GLOWPLUG
INSTALLATION ,
2-5
6-7
8-9
ENGINE EXPLODED VIEW &PARTS LIST
10-12
CARBURETOR EXPLODED VIEW &PARTS LIST
13-14
15-17
1
CONTENTS
18-22
23-25
26-27
28-31
32-33
34-35
36-37
38
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Related Manuals for O.S. Speed 12xz Spec II
Summary of Contents for O.S. Speed 12xz Spec II
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Page 1: Table Of Contents
It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages 2-5 of this booklet and to strictly adhere to the advice contained therein. Also, please study the entire contents of this instruction manual, so as to familiarize yourself with the controls and other features of the engine. -
Page 2: Safety Instructions And Warnings About Your O.s. Engine
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE 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. - Page 3 NOTES • This engine is intended for model cars. • The wearing of safety glasses is also Do not attempt to use it for any other strongly recommended. purpose. • Take care that the glowplug clip or • Mount the engine in your model battery leads do not come into contact securely, following the manufacturers' with rotating parts.
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Page 4: Applying An Electric Starter
Near TDC ENGINE CONSTRUCTION With this engine, the piston will feel tight at the top of its stroke Piston (TDC) when the engine is cold. Cylinder Liner This is normal. The cylinder bore has a slight taper. The piston and cylinder are designed to Crankshaft achieve perfect... -
Page 5: About The Warranty
Also, the engine is free of warranty due to damage and/or wear occurred during running. ABOUT THE ENGINE The O.S. SPEED 12XZspec is a Standard accessories high performance engine meeting IFMAR specification produced by Glow Plug RP6 T-type head (Turbo head) 1piece O.S.’s SPEED TEAM technicians. -
Page 6: Tools, Accessories, Etc
TOOLS, ACCESSORIES, etc. Model engine fuel is also highly The following items are necessary for operating the engine. flammable. Keep it away from open Items necessary for starting flame, excessive heat, sources of sparks, FUEL or anything else which might ignite it. Do Generally, it is suggested that the user selects a fuel that is commercially available for model two-stroke not smoke or allow anyone else to... -
Page 7: Basic Engine Parts
BASIC ENGINE PARTS Outer Head Exhaust Cover Plate Carburetor Type 12F(B) Mounting Lugs Crankshaft Crankcase Crankshaft Ball Bearing (Front) INSTALLATION OF THE STANDARD ACCESSORIES INSTALLATION OF THE DUST CAP SET Installing the glow plug. If the engine is to be stored or out of use for a while, Insert RP6 plug supplied install the included exhaust and carburetor dust caps into heatsink-head care-... - Page 8 GLOWPLUG Glowplug life Since the compatibility of the glowplug and fuel may have a marked effect on Particularly in the case of very high performance performance and reliability, it is suggested engines, glowplugs must be regarded as expendable to use the O.S. RP6 plug when it is items.
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Page 9: Carburetor Controls 12F(B)
ENGINE INSTALLATION Make sure that the vehicle's engine mounting surfaces are level and in the same plane. Poor installation may cause distortion of the Do not allow bottom crankcase, bearings, etc., resulting in erratic of crankcase to running and loss of performance. touch chassis. -
Page 10: Starting The Engine & Running-In ('Breaking-In)
STARTING THE ENGINE & RUNNING-IN ('Breaking-in) RUNNING-IN ('Breaking-in) While Operating Running- in is a procedure for an engine to come Please do not run on a public street, this close to actual running conditions (fuel, r.p.m., could cause serious accidents, personal engine temperature, etc.). - Page 11 Switch on the transmitter and make sure Set the throttle opening a little wider that the that each linkage moves correctly. factory setting by adjusting the Throttle Stop Screw. Turn the engine with starter box to draw fuel into the engine. approx 1mm Deliver fuel into the carburetor.
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Page 12: Final Adjustment
How to stop the engine The position of the needle-valve To stop the engine, close the throttle to idle when starting the engine. speed and shut it off completely with the trim lever on the transmitter then cut off the fuel Needle Close the needle-valve approx. - Page 13 Warning! With the engine running, close the throttle and allow it to idle for about five seconds, Mixture adjustments (whether via the then reopen the throttle fully. If, at this point, Metering Needle, or the Needle-Valve) the engine puffs out an excessive amount of cannot be made accurately under 'no-load' smoke and the vehicle does not accelerate conditions, which, in any case, are not...
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Page 14: Care And Maintenance
CARE AND MAINTENANCE The minute particles of foreign matter, that At the end of each operating session, drain out are present in any fuel may, by accumulating any fuel that may remain in the fuel tank. and partially obstructing fuel flow, cause Afterwards,energize the glow-plug and try to engine performance to become erratic and restart the engine, to burn off any fuel that may... -
Page 15: Trouble Shooting
TROUBLE SHOOTING Symptom Engine fails to fire. Corrective action Cause Fuel tank is empty. Fill the tank with fuel and repeat Fuel not reaching the engine. Priming procedure. Glowplug element is burnt out. Replace glowplug. Glowplug battery discharged Recharge or replace the battery. Clean or replace fuel filter. - Page 16 Symptom Unstable idle Corrective action Cause Unsuitable glowplug Use suggested glowplug in the instructions. Do not use extremely high nitro or low oil content fuel. Unsuitable fuel Extremely light flywheel Add heavier flywheel. Silencer is disconnected or has play Install silencer securely. Symptom Not reaching expected peak r.p.m.
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Page 18: Carburetor Exploded View
CARBURETOR EXPLODED VIEW Type of screw S.M3x3 S...Set Screw CARBURETOR PARTS LIST Description Code No. 21982700 Mixture Control Valve Assembly 27881820 "O" Ring (L) (2pcs.) 22781800 "O" Ring (S) (2pcs.) 21681900 Needle Valve Assembly 27881820 "O" Ring (2pcs.) 21881950 No.14 Universal Nipple Assembly 71533255 Carburetor Reducer (5.5mm Red) 22615000... -
Page 19: O.s. Genuine Parts & Accessories
16mm (3pcs.) 71414030 (73301612) O.S. SPEED HEX WRENCH TIP ONLY 3.0 71414120 O.S. SPEED HEX BALL WRENCH TIP ONLY 2.0 71414125 O.S. SPEED HEX BALL WRENCH TIP ONLY 2.5 71414230 O.S. SPEED FLAT HEAD SCREWDRIVER TIP 3.0 71414355 O.S. SPEED NUT DRIVER TIP ONLY 5.5 71414360 O.S. -
Page 20: Three View Drawing
THREE VIEW DRAWING Dimensions (mm) SPECIFICATIONS ■ 2.1 cc ( 0.128 cu.in. ) Displacement ■ 13.8 mm (0 .543 in. ) Bore ■ 14.0 mm ( 0.551 in. ) Stroke ■ 5,000-44,000 r.p.m. Practical R.P.M. ■ Power output 1.75 ps / 35,000 r.p.m. ■...
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