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.
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE Remember that your engine is not a "toy", but a highly efficient internalcombustion 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.
NOTES This engine is intended for model cars. Do not attempt to use it for any other purpose. The wearing of safety glasses is also strongly recommended. Mount the engine in your model securely, following the manufacturers' recommendations, using appropriate screws and locknuts. Take care that the glowplug clip or battery leads do not come into contact with rotating parts. Also check that the linkage to the throttle arm is secure. Fit an effective silencer (muffler).
INTRODUCTION The MAX-18CV-R and MAX-18CV-RX are high-perfomance engines for 1/10 class R/C cars. The 18CV-RX is a recoil starter version. Newly developed 11G slide valve carburetor is equipped. NOTE: With this engine, the piston will feel tight at the top of its stroke when the engine is cold. This is normal. The piston and cylinder are designed to achieve a perfect running clearance when they reach their normal running temperatures.
INSTALLATION OF THE CARBURETOR ENGINE INSTALLATION As delivered, the engine has its carburetor lightly fit into the intake boss. Secure it as follows. Make sure that the vehicle's engine mounting surfaces are level and in the same plane. Poor installation may cause distortion of the crankcase, bearings, etc., resulting in erratic running and loss of performance. The recommended screws for securing the engine are 3mm or 4-40 steel Allen hexagon socket type.
REPLACMENT OF ELEMENT ASSEMBLY NOTE: During storage, the oil may have become unevenly dispersed through the element. This will be indicated if the blue colour of the element material appears patchy. In this case, place the element in a small plastic bag and gently rub the element between finger and thumb to redistribute oil. Insert the filter element on the element base. Fit the end plate with retaining screw, making sure that the element fits correctly between the end plate and base.
The role of the glowplug NOTE: Because, in the interests of personal safety, dismantling of the starter mechanism is strongly discouraged, the Recoil Starter is available for replacement only as a preassembled unit. However, some related parts, such as Starting Shaft and Rear Adaptor, are obtainable separately. (See Parts List.) With a glowplug engine, ignition is initiated by the application of a 1.5-volt power source.
FUEL PUMP Reminder! 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. For filling the fuel tank, a simple, polyethylene "squeeze" bottle, with a suitable spout, is required. LONG SOCKET WRENCH 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.
STARTING THE ENGINE & RUNNING-IN ('Breaking-in') The following procedure is suitable for these engines when the O.S. T-1030 tuned silencer and a fuel containing up to 30% nitromethane are used. Use the same fuel as is to be employed for all initial running and containing NOT LESS THAN 18% lubricant. energize glowplug. Start the engine using a starter box, making sure the engine rotation direction is correct (counter-clockwise seen from the crankshaft end). Be sure to fit an air cleaner when starting.
FINAL ADJUSTMENT IF THE ENGINE FAILS TO START Check the following: Run the vehicle (with throttle fully open) over the longest available straight course, in order to observe the model's speed. Next return the car to the starting point, close the Needle-Valve 30˚ and repeat the run, taking note of the improvement in performance. Continue with further runs, gradually reducing the Needle-Valve setting and aiming to achieve the highest straight-line speed.
CARBURETTOR CLEANLINESS The correct functioning of the carburetor depends on its small fuel orifices remaining clear. BALL LINK AND SLIDE VALVE EXTENSION REALIGNMENT OF MIXTURE CONTROL VALVE In the course of making carburetor adjustments, it is just possible that the Mixture Control Valve may be inadvertently screwed in or out too far and thereby moved beyond its effective adjustment range.
18CV-R EXPLODED VIEW 18CV-R ENGINE PARTS LIST C.M2.6x12 No. Code No. 1 2 16 C.M2.6x7 4 6 15 7 23 22 3 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 21804000 21824000 21823000 21816000 21817000 21815000 21883000 21818000 20810007 21408000 21833000 21811000 21832000 21812000 21807100 21213000 71608001 72413000 72413200 Description Heatsink Head Gasket Set Cylinder & Piston Assembly Piston Pin Piston Pin Retainer (2pcs.
18CV-RX EXPLODED VIEW 18CV-RX ENGINE PARTS LIST C.M2.6x12 1 2 3 25 24 5 4 6 7 M.+M2.6x7 14 8 13 12 11 9 18-1 18-2 15 16 Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw Code No.
11G CARBURETOR EXPLODED VIEW 2-1 2 3 2-2 4 1-1 1-2 5 6 1 7 9 8 Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw C. M 3 . 5 x 8 26 11G CARBURETOR PARTS LIST No. Code No. 1 1-1 1-2 2 2-1 2-2 3 4 5 6 7 8 9 21285600 46066319 22781800 21285901 27881820 21881950 23818500 21883100 21483200 21483600 21881320 23818420 22615000 Description Mixture Control Valve Assembly "O" Ring(L) (2pcs.) "O" Ring(S) (2pcs.
O.S. GENUINE PARTS & ACCESSORIES RACING ENGINE PARTS O.S.
18CV-R THREE VIEW DRAWING 11 SPECIFICATIONS 3.0 cc (0.183 cu.in.) 16.0mm (0.629 in.) 15.0mm (0.590 in.) M5x0.8 3,000-32,000 r.p.m. 1.35 ps / 28,000 r.p.m. 237.5g (8.38oz.) 31.4 Displacement Bore Stroke Practical R.P.M. Power output Weight 25 27.5 Dimensions(mm) 25 39 15 41 69 30 18CV-RX THREE VIEW DRAWING 11 SPECIFICATIONS 3.0 cc (0.183 cu.in.) 16.0mm (0.629 in.) 15.0mm (0.590 in.) M5x0.8 3,000-32,000 r.p.m. 1.35 ps / 28,000 r.p.m. 295.5g (10.43oz.) 31.
MEMO L I TY PRECISION & P ERF QUA ED OR L L M TA BL ISH ING NC ES E E ANC UNEQ UA 32 L CEL THE STAN ARDS OF EX D E 6-15 3-Chome Imagawa Higashisumiyoshi-ku Osaka 546-0003, Japan TEL. (06) 6702-0225 FAX. (06) 6704-2722 URL : http://www.os-engines.co.jp C Copyright 2003 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan.
