O.S. engine MAX-18CV-RMX Owner's Instruction Manual
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O.S. engine MAX-18CV-RMX Owner's Instruction Manual

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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
INSTRUCTIONS,
CONTENTS
2-5
6-7
8-10
EXPLODED ENGINES VIEWS &
11-12
PARTS LIST
12-14
15
16-20
1
21-22
23-25
25-29
30-33
34-35
36
37-38

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Summary of Contents for O.S. engine MAX-18CV-RMX

  • Page 1: Table Of Contents

    It is suggested that any instructions supplied ● with the vehicle, radio control equipment, etc., are accessible for checking at the same time. CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE 21-22 FINAL ADJUSTMENT CARBURETOR CLEANLINESS, ENGINE CONSTRUCTION, NOTES WHEN 23-25...

  • Page 2: Safety Instructions And Warnings About Your O.s. Engine

    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.
  • Page 3 NOTES Take care that the glowplug clip or battery This engine was designed for model boats. leads do not come into contact with the pro- Do not attempt to use it for any other purpose. peller or any other rotating parts. Also check Mount the engine in your model securely, that the linkage to the throttle arm is secure.

  • 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. Crankshaft The piston and cylinder are Slight taper designed to achieve a perfect running clearance when they...

  • Page 5: Tools, Accessories, Etc

    18CV-RM & 18CV-RMX INSTRUCTIONS MAX- MAX- This manual handles the following two versions. About the Head Gasket 18CV-RM with 11J carburetor MAX- These engines are equipped with two head 18CV-RMX with 11J carburetor MAX- gaskets of 0.1mm thick and 0.2mm thick. It is suggested to adjust the total thickness The O.S.

  • Page 6: Basic Engine Parts

    TOOLS NOTE Never use a propeller that has even a HEX SCREWDRIVER slight damage. Necessary for engine installation. REMINDER! 1.5mm, 2mm, 2.5mm, 3mm Never touch, or allow any object to come into contact with, the rotating propeller and do not crouch over the engine when it is SCREWDRIVER running.

  • Page 7: Carburetor Controls (11J)

    CARBURETOR CONTROLS ( 11J ) INSTALLATION OF THE CARBURETOR Three adjustable controls are provided on this As delivered, the engine has its carburetor carburetor. lightly installed into the intake boss. Secure it The Needle-Valve: as follows. For adjusting the mixture strength when the throttle Loosen the retainer screw, rotate the is fully open.

  • Page 8: Notes Concerning The Recoil Starter

    NOTES CONCERNING THE RECOIL STARTER (18CV-RMX ONLY) REMINDER! Try to avoid spilling fuel over the starter Do not attempt to disassemble the recoil unit and its cord. Some fuels have a starter. If you do so, the very strong detrimental effect on these parts. spring inside will be suddenly ejected.

  • Page 9: Starting The Engine & Running-In ('Breaking-In)

    STARTING THE ENGINE & RUNNING-IN ('Breaking-in) PRESSURIZED FUEL SYSTEM The following procedure is suitable for these The somewhat violent changes of hull attitude engines when the fuel containing up to 30% that occur in running, combined with the fact nitromethane are used. that, in boats the fuel tank is often located some distance from the carburetor, means Fill the tank completely with fuel.
  • Page 10 Now connect glowplug battery lead to heat When the engine starts, first repeat low the plug filament and start the engine. speed running and medium speed running by raising and lowering throttle stick on the Start the engine using an electric starter transmitter to warm up the engine.

  • Page 11: Final Adjustment

    TO STOP THE ENGINE Lower the throttle trim and/or throttle stick on the transmitter. Throttle Trim Throttle Stick Warning! Do not touch rotating parts, engine and si- lencer when stopping the engine as they become very hot, and contact with them may result in a serious burn.

  • Page 12: Carburetor Cleanliness

    With the optimum mixture control position, Carry out adjustments patiently, under light smoke is visible during high speed actual running conditions, until the engine running,and the engine rpm increases responds quickly and positively to the smoothly during acceleration. Remember throttle control. that, if the engine is operated with the fuel/air mixture slightly too lean, it will overheat and Warning!

  • Page 13: Care And Maintenance

    CARE AND MAINTENANCE Engine maintenance is very important for good Do not forget to clean the filters regularly to running next time. Carry out the followings. remove dirt and lint that accumulate on the filter screens. Also, clean the carburetor As previously observed, foreign matter in itself occasionally.

  • Page 14: Trouble Shooting

    Symptom TROUBLE SHOOTING 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 15 Symptom Unstable idle Corrective action Cause Unsuitable glowplug Use suggested glowplug in the instructions. Do not use extremely high nitro or Unsuitable fuel low oil content fuel. Extremely light flywheel Add suitable load. Silencer is disconnected or has play Install silencer securely. Symptom Not reaching expected peak r.p.m.
  • Page 16 18CV-RM EXPLODED VIEW 18CV-RM ENGINE PARTS LIST C.M2.6x18 Code No. Description 21804100 Water Cooled Head Assembly 21824000 Gasket Set 21823000 Cylinder & Piston Assembly 21816000 Piston Pin 21817000 Piston Pin Retainer (2pcs.) 21815000 Connecting Rod 21884000 Carburetor Complete (Type 11J) 21818000 Carburetor Retainer Assembly 20810007...
  • Page 17 18CV-RMX EXPLODED VIEW 18CV-RMX ENGINE PARTS LIST C.M2.6x18 Code No. Description 21804100 Water Cooled Head Assembly 21824000 Gasket Set 21823000 Cylinder & Piston Assembly 21816000 Piston Pin 21817000 Piston Pin Retainer (2pcs.) 21815000 Connecting Rod 21884000 Carburetor Complete (Type 11J) 21818000 Carburetor Retainer Assembly 20810007...

  • Page 18: Parts List

    11J CARBURETOR EXPLODED VIEW 11J CARBURETOR PARTS LIST Code No. Description 21285901 Needle Valve Assembly 27881820 "O" Ring (2pcs.) 21881950 No.14 Universal Nipple Assembly 22681310 Throttle Stop Screw 21884100 Carburetor Body 22481506 Rotor Spring 21884200 Carburetor Rotor 21283210 Dust Cover 22681419 Throttle Lever 21481420...

  • Page 19: Genuine Parts & Accessories

    O.S. GENUINE PARTS & ACCESSORIES MARINE UNIVERSAL SUPER JOINT TUBE 15 SUPER FILTER GLOW PLUG JOINT (72403050) (72103310) (71605300) 3.5mm (21342000) (71605100) CAP SCREW SET LONG SOCKET WRENCH DUST CAP SET LOCK WASHER (10sets) (10pcs. set) WITH PLUG GRIP (73300305) (5 pcs.

  • Page 20: Three View Drawing

    18CV-RMX 11J THREE VIEW DRAWING SPECIFICATIONS 3.0 cc ( 0.183 cu.in. ) Displacement 16.0mm (0 . 629 in. ) Bore 15.0mm ( 0.590 in. ) Stroke 3,000-32,000 r.p.m. Practical R.P.M. 1.35 ps / 28,000 r.p.m. Power output M5x0.8 232.6g (8.21oz.) Weight 27.5 33.8...

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