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O.S. engine MAX-12TR Series, Owner'S Instruction Manual, Page: 8 / 30

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O.S. engine MAX-12TR Series Owner'S Instruction Manual Download Page 8

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 
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. 
If existing holes in the engine mount do not align 
perfectly with engine mounting lugs, enlarge 
them slightly with a needle-file so that screws 
enter vertically. 

Chassis

Chamfer inside edges of bearers.

INSTALLATION OF THE CARBURETTOR

As delivered, the engine has its carburettor 
lightly fit into the intake boss. Secure it as 
follows.

Loosen the retainer screw, rotate the 
carburettor to its correct position and make 
sure that it is pressed well down into the 
intake boss, compressing the rubber gasket, 
before retightening screw.

Rotate the retainer screw gently until it 
stops, then tighten a further 60-90˚.
Do not overtighten the screw as this will 
damage the carburettor body.

1.

2.

Rotate the retainer nut
gently until it stops.

Tighten a further 60-90˚

Fit the exhaust seal ring supplied.

7

Summary of Contents for MAX-12TR Series

Page 1: ...ontained 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 ...

Page 2: ...TOR CONTROLS PRESSURIZED FUEL SYSTEM STARTING THE ENGINE RUNNING IN Breaking in FINAL ADJUSTMENT CARBURETTOR CLEANLINESS CARE AND MAINTENANCE O S GENUINE PARTS ACCESSORIES ENGINES EXPLODED VIEW PARTS LIST CARBURETTOR EXPLODED VIEW PARTS LIST THREE VIEW DRAWING MEMO IF THE ENGINE FAILS TO START 2 5 7 8 10 11 11 12 13 14 12 8 9 6 15 17 18 19 28 15 16 20 23 24 25 26 27 1 ...

Page 3: ...equest that these instructions are also passed on to its new owner SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE The advice which follows applies basically to ALL MODEL ENGINES and is grouped under two headings according to the degree of damage or danger which might arise through misuse or neglect WARNINGS NOTES These cover events which might involve serious in extreme circumstances even ...

Page 4: ...es of sparks or anything else which might ignite it Do not smoke or allow anyone else to smoke near to it Never operate your engine in an en closed space Model engines like automobile engines exhaust deadly carbon monoxide Run your engine only in an open area Model engines generate considerable heat Do not touch any part of your engine until it has cooled Contact with the muffler silencer cylinder...

Page 5: ... of the more powerful highspeed engines may eventually impair your hearing and such noise is also likely to cause annoyance to others over a wide area The wearing of safety glasses is also strongly recommended 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 For their safety keep all onlookers e...

Page 6: ...the fuel supply by pinching the fuel delivery line from the tank Warning Immediately after a glowplug ignition engine has been run and is still warm conditions sometimes exist whereby it is just possible for the engine to abruptly restart if it is rotated over compression WITHOUT the glowplug battery being reconnected 5 ...

Page 7: ...h integral pilot shaft Crankshaft Glow plug Washer Drive Hub Crankcase Beam Mount Heatsink Head Cover Plate As delivered the engine has its carburetor lightly fit into its intake Secure it changing its angle according to the car chassis NOTE 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 achie...

Page 8: ...so that screws enter vertically Chassis Chamfer inside edges of bearers INSTALLATION OF THE CARBURETTOR As delivered the engine has its carburettor lightly fit into the intake boss Secure it as follows Loosen the retainer screw rotate the carburettor to its correct position and make sure that it is pressed well down into the intake boss compressing the rubber gasket before retightening screw Rotat...

Page 9: ...that it does not foul the cylinder head or obstruct the needle valve INSTALLING THE FILTER ELEMENT The element is already impregnated with a special filter oil As this oil is very sticky take care when handling it to prevent dust or dirt from adhering to the element If your fingers become contaminated wash them with soap and water During storage the oil may have become unevenly dispersed through t...

Page 10: ...ormance maintained by careful use i e The role of the glowplug With a glowplug engine ignition is initiated by the application of a 1 5 volt power source When the battery is disconnected the heat retained within the combustion chamber remains sufficient to keep the plug filament glowing thereby continuing to keep the engine running Ignition timing is automatic under reduced load allowing higher rp...

Page 11: ...the brand of fuel is changed it is advisable to initially run the engine with a richer needle valve setting so that the optimum setting for the new fuel may be rechecked as described in the RUNNING IN paragraphs When engines are run at very high speeds and on high nitro fuels glowplug elements do not last so long Model engine fuel is poisonous Do not allow it to come into contact with the eyes or ...

Page 12: ...ture Control Screw The Throttle Stop Screw For setting the minimum idling speed Needle Valve Mixture Control Valve Assembly Screw Throttle Stop Screw Ball Link NOTE Readjustment may be necessary occa sionally to allow for changes in fuel for mula gear ratio or clutch engagement point Three adjustable controls are provided on this carburettor For adjusting the mixture strength when the throttle is ...

Page 13: ...alve Assembly Screw Throttle Stop Screw The somewhat violent changes of vehicle attitude that occur in off road running combined with the fact that in buggy type cars the fuel tank is often located some distance from the carburettor means that fuel head at the carburettor can vary and upset running Therefore it is recommended that a muffler pressurized fuel feed system be used Never run your vehic...

Page 14: ...dle valve clockwise slowly and gently until it stops This is the fully closed position Do not use force to turn the needle valve beyond this point Open Close Needle Valve In case of the 10J caburettor In case of the 10M caburettor Set the throttle stop screw so that the minimum throttle opening idle setting is approximately 1 0mm Throttle Stop Screw STARTING THE ENGINE RUNNING IN Breaking in Set t...

Page 15: ...g which time the throttle may be opened for brief bursts of increased power If the engine stops at medium speeds close the Mixture Screw 45 90 Needle The position of the needle valve when starting the engine Close the needle valve approx 30 after running the vehicle for every five full tanks of fuel Repeat this procedure around 5 times 3 0 3 0 To stop the engine close the throttle to idling speed ...

Page 16: ... 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 Remember however that if the Needle Valve is shut down too far the engine will overheat and accompanied by visibly diminished exhaust smoke the model will lose speed At this point throttle down immediately stop the vehicle a...

Page 17: ...s the risk of seriously damaging the engine through over revving and overheating With the optimum mixture control position light smoke is visible during high speed running and the engine revolutions increase smoothly during acceleration Remember that if the engine is operated with the fuel air mixture slightly too lean it will overheat and run unevenly As with all engines it is advisable to set bo...

Page 18: ...wed in or out too far and thereby moved beyond its effective adjustment range Its basic position can be found by first rotating the Mixture Control Valve until its slotted head is flush with the carburettor body The valve is then screwed in exactly 2 5 turn to re establish its neutral position Mixture Control Valve Carburettor Body First rotate the Mixture Control Valve until its slotted head is f...

Page 19: ...nergize 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 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 5 Do not inject after run oil into t...

Page 20: ... Tube 15 T 1020 Tuned Silencer Crankshaft Clamp 1521 Long Socket Wrench With Plug Grip φ3 73300305 φ7 73300712 φ12 73301212 Dust Cap Set For Carburettor Nipple For T 1020 Tuned Silencer For 10J 10E M Carburettor Header Pipe Spring 72106172 72106170 For Pure10 Class Header Pipe Spring 72106172 Short Long 72106180 For Pure10 Class Header Pipe Spring 72106172 72103030 T 1030 Tuned Silencer 19 ...

Page 21: ...12TR EXPLODED VIEW Type of screw C Cap Screw M Oval Fillister Head Screw F Flat Head Screw N Round Head Screw S Set Screw C M2 6x7 1 1 1 2 1 20 2 3 5 6 4 7 8 9 0 q w r t e ...

Page 22: ...ype 10J Connecting Rod Piston Pin Retainer 2pcs Piston Pin Cylinder Piston Assembly Heatsink Head Assembly Description Code No Carburettor Complete Type 10M Propeller Nut Drive Hub Cover Plate 7 2403 320 7 2403 310 2 1457 000 2 1464 000 2 1452 000 2 1430 000 7 2403 300 7 1605 100 2 1213 000 2 1451 000 2 2631 020 2 1458 000 2 0810 007 2 5381 701 2 1484 000 2 1483 000 2 1455 000 2 3817 000 2 1256 00...

Page 23: ...Type of screw C Cap Screw M Oval Fillister Head Screw F Flat Head Screw N Round Head Screw S Set Screw 12TR P EXPLODED VIEW C M2 6x12 C M2 6x7 1 1 1 2 1 22 2 3 4 5 6 7 8 9 0 q w ...

Page 24: ...00 2 1453 000 2 1454 600 1 1 1 2 2 1454 620 2 1454 610 2 1427 200 103 Cleaner Body 103 Filter Elements 4pcs Super Air Cleaner 103 W 2 filter elements Screw Set Glow Plug A5 Gasket Set Crankshaft Crankshaft Ball Bearing Rear Crankcase Crankshaft Ball Bearing Front Carburettor Retainer Carburettor Complete Type 10J Connecting Rod Piston Pin Retainer 2pcs Piston Pin Cylinder Piston Assembly Heatsink ...

Page 25: ...Rubber Gasket Ball Link No 4 Dust Cover Metering Needle Assembly Slide Valve No 14 Universal Nipple Assembly Carburetor Body O Ring 2pcs Needle Valve Assembly Throttle Stop Screw O Ring S 2pcs O Ring L 2pcs Mixture Control Valve Assembly Description Code No No 2 2615 000 2 2781 800 4 6066 319 2 1285 600 2 3818 500 2 7881 820 2 1285 901 2 1483 100 2 1483 200 2 1483 600 2 1881 320 2 3818 420 1 1 1 2...

Page 26: ...edle Valve Assembly Throttle Stop Screw Mixture Control Screw Description Code No Throttle Lever Fixing Nut Throttle Lever Carburettor Rotor Rotor Spring O Ring 2pcs No 2 2615 000 2 7881 820 2 1484 600 2 1481 420 2 2681 419 2 1283 210 2 1484 200 2 2481 506 2 1484 100 2 2681 310 2 1881 950 2 1285 901 1 1 2 7881 820 1 2 9 1 No 14 Universal Nipple Assembly 25 0 0 1 1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 ...

Page 27: ... Power output Weight SPECIFICATIONS 12TR THREE VIEW DRAWING Dimensions mm 31 4 11 4 φ3 3 17 7 40 8 12 8 71 6 14 1 M5X0 8 2 11 cc 0 129 cu in 14 0mm 0 551 in 13 7mm 0 539 in 4 000 36 000 r p m 1 1 bhp 30 000 r p m 216 5g 7 5oz MAX 12TR W 10J 26 ...

Page 28: ...s mm Displacement Bore Stroke Practical R P M Power output Weight SPECIFICATIONS 31 4 11 4 φ3 3 17 7 34 8 12 8 71 6 29 6 1 4 28UNF 2 11 cc 0 129 cu in 14 0mm 0 551 in 13 7mm 0 539 in 4 000 36 000 r p m 1 1 bhp 30 000 r p m 210g 7 27oz 27 ...

Page 29: ...MEMO 28 ...

Page 30: ...eserved Printed in Japan 100100 TEL 06 6702 0225 FAX 06 6704 2722 6 15 3 Chome Imagawa Higashisumiyoshi ku Osaka 546 0003 Japan URL http www os engines co jp U N E Q U A LLED QUALITY PRECISION PERFOR M A N C E E S T A BLISHING THE STANDARDS OF EXCELLE N C E ...

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