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321B Nitro Engine Instruction Manual

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321B Nitro Engine Instruction Manual 321B Nitro Engine Instruction Manual www.ProTekRC.com Copyright © 2014 INSTRUCTION MANUAL It is important that before attempting to operate your engine that you read, understand and strictly follow the outlined guidelines in the “Safety Instructions, Warnings and Notes” section on pages 1-3 of this manual. • Study the information provided in this manual in order to become familiar with the controls and features of the engine. • Keep these instructions in a safe place so that you may refer to them when needed. • It is recommended that you keep the instructions for the vehicle, radio/transmitter equipment, etc. accessible at the same time so that you may refer to them when needed. CONTENTS 1-3 Safety Instructions, Warnings & Notes 4-5 Engine Construction & Notes When Applying the Starter Box 6-7 About the Engine & Standard Included Accessories 8-10 Required Items & Basic Engine Parts 11-12 Carburetor Controls & Glow Plug 13-15 Installation of the Standard Accessories & Engine Installation 16-20 Starting & Breaking-In the Engine 21-23 Final Adjustment 24-25 Care & Maintenance 26-28 Troubleshooting 29-30 Engine Exploded View & Parts List 31-32 Carburetor Exploded View & Parts List 33 Engine Accessories 34 3D Drawing & Specifications SAFETY INSTRUCTIONS, 3D DRAWING & SPECIFICATIONS WARNINGS & NOTES Displacement 3.46cc (0.211cu.in.) Practical R.P.M. 3,000 - 40,000 R.P.M. Remember, this engine is not a “toy”! This is an internal combustion engine that has the potential to damage property, as well as harm you or others if misused. As the owner, you Bore 16.6mm (0.654in.) Power Output 2.5ps / 34,000 R.P.M. alone are responsible for the safe operation of this engine. Act with discretion and care at all Stroke 16.0mm (0.630in.) Weight 355g (12.52oz) times. If the ownership of this engine is transferred to another person, it is the responsibility of the original owner to provide this manual to the new owner. The following warnings apply to ALL MODEL ENGINES and are grouped under two M3x18 headings according to the degree of danger and/or damage which could occur due to misuse or neglect of this product. 13 WARNINGS NOTES These cover events which could These cover the many other and generally less cause serious, and in extreme obvious sources of danger, but which under certain circumstances, even fatal injury. circumstances may also cause damage or injury. 1 WARNINGS 2 Near TDC Model engine fuel is poisonous. Do not allow it to come into contact with the Near TDC eyes or mouth. Always store fuel in a clearly marked container and out of the 3 reach of children. Piston Cylinder Liner Piston Model engine fuel is highly flammable. Keep it away from open flames, excessiveCylinder heat, Liner sources of sparks, or anything else that could ignite it. Do Near TDC not smoke or allow anyone else to smoke near it. 4 Carburetor Restrictor (Venturi) CrankshaftM2.6x7 Carburetor Restrictor (Venturi) Near TDC Model engineSlightCrankshaft taper exhaust, like automobile engine exhaust, contains deadly carbon-monoxide.Slight taper Never operatePiston your engine in an enclosed space. Run High Speed Needle 7 8your engineCylinder onlyLiner in an open, well ventilated area. High Speed (Needle Valve) Slide Boot 7 8 Needle (Needle Valve) Slide Boot Piston Mid Needle Idle Screw Model enginesCylinder Liner generate considerable heat. Do not touch any part of your (Mixture Control Valve)Carburetor Restrictor (Venturi) Mid Needle Idle(Throttle Screw Stop Screw) Crankshaft engine until it has cooled. Contact with the exhaust system or cylinder head (Mixture Control Valve) (Throttle Stop Screw) may resultSlight in ataper serious burn. 5 When the engine is cold. When the engine is hot. O-Ring 12 High Speed Carburetor Restrictor (Venturi) When theCrankshaft engine is cold. When the engine is hot. O-Ring 7 8 Needle Ball Link Rotate the retainer (Needle Valve) Slide Boot Slight taper Ball Link 11 Rotatenut gently the untilretainer it stops HighMid Needle Speed 01 nut gently until it stops Idle Screw 34 Tighten a further O-Ring Needle 7 10 8 (Mixture Control Valve) (Throttle Stop Screw) 120º - 180º O-Ring Retaining Screw (Needle Valve) Low SpeedSlide Needle Boot Dimensions (mm) Tighten a further (Metering Needle) Glowplug 120º - 180º Retaining Screw Thermo Insulator Low Speed Needle Mid Needle (MeteringIdle Screw Needle) Glowplug When the engine is cold. When the engine is hot. O-Ring (MixtureThermo Control Insulator Valve) (Throttle Stop Screw) 9 Exhaust Dirt and dust may lodge in marked places 7 Gasket Close Ball Link Exhaust Rotate the retainer Dirt and dust may lodge in marked places 6 Turn the high speed needle clockwise Close M2.6x18 WhenGasket the enginenut isgently untilcold. ituntil stops. it Whenstops This theis the engine fully isclosed hot. Turn the high speed needle clockwise O-Ring High Speed Do not allow untilposition. it stops. Do not This force is the it tofully turn closed further. O-Ring bottom of crankcase Tighten a further HighNeedle Speed Do not allow Ball Link Rotateposition. the retainer Do not force it to turn further. Open Retaining Screw to touch chassis Low Speed Needle 8 120º - 180º Needle bottom of crankcase Open (Metering Needle) Glowplug nut gently until it stops to touch chassis approx 0.5mm Thermo Insulator Tighten a further O-Ring Element glows when energized Pliers approx 0.5mm Chamfer inside edges of bearers Exhaust Approx. 0.5mm open 120º - 180º DirtRetaining and dust Screw may lodge in marked places Low Speed Needle Element glows when energized Pliers Close Chamfer inside edges of bearers (Metering Needle) Glowplug Gasket Approx.factory setting 0.5mm with open the Turn the high speed needle clockwise Thermo Insulator factoryrestrictor setting removed. with the until it stops. This is the fully closed Do not allow restrictor removed. High Speed Dirt and dust may Carburetorlodge in Body marked places Exhaust position. Do not force it to turn further. Ball Link bottom of crankcase Close Needle Carburetor Body Replace the plug when the Gasket Open BallRotate Link the low speed needle until the head Turnapprox the high 1mm speed needle clockwise High Speed Needle to touch chassis Replaceelement thedoes plug not whenglow orthe is sticks out 0.5mm from the ball link body. untilapprox it stops. 1mm This is the fully closed High Speed Needle Rotate the low speed needle until Dothe nothead allow elementburnt out. does not glow or is approx 0.5mm High Speed This is the standard position. position. Do not force it to turn further. sticks out 0.5mm from the ball linkbottom body. of crankcase Elementburnt out. glows when energized Pliers Needle This is theChamfer standard inside position. edges of bearers Glow Plug Igniter Approx. 0.5mm open Open to touch chassis Glow Plug Igniter factory setting with the Low Speed Needle approx 0.5mm restrictor removed. Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. 1 Element glows when energized Low Speed NeedleChamfer inside edges of bearers Pliers Idle Screw Carburetor Body Deliver fuel to the carburetor High speed needleApprox. position 0.5mm when open Slide Valve 5.5 turnsBall out.Link Make adjustments with the slide in the open position. Replace the plug when the starting the engine.factory setting with the Idle Screw Low Speed Needle Deliver fuel to the carburetor High speed needleapprox position 1mmClose when the high speed High Speed Needle Rotate the low speed needle until the head element does not glow or is restrictor30º removed. Low Speed Needle First rotate the mid needle until its slotted starting the engine. needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE sticks out 0.5mm from the ball link body. 1-1 burnt out. Needle Close the high speed Carburetor Body head is ush with the carburetor body. This is the Fuel Tank Side 30º 30°6 as needed. This FirstBall Thisrotate Link is the midstandard needle position. until its slotted Fuel needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE standard position. Replace the plug when the Needle Open Close Open Close head is ush with the carburetor body. This is the Glow PlugFuel Igniter Tank Side approx 1mm30°procedure as needed. will be This repeated Rotate the low speed needle until the head Fuel 6-1 High Speed Needle standard position. S.M3x3 element does not glow or is procedureseveral times will throughout be repeated Open Close Open Close sticks out 0.5mm from the ball link body. Low Speed Needle burnt out. severalthe break-in times process. throughout Mid NeedleThis is the standard position. Slide Valve 5.52¾ turns turns out. out. Make Make adjustments adjustments with with the the slide slide in in the the open open position. position! the break-in process. Mid Needle Glow Plug Igniter More fuel LessIdle fuel Screw More fuel Less fuel Carburetor Body Deliver fuel to the carburetor High speed needle position when 2¾ turns out. Make adjustments with the slide in the open position! starting the engine. More fuel Less fuel MoreLow fuel SpeedLess Needle fuel Carburetor Body Close the high speed Low Speed Needle 30º Slide Valve 5.5First turns rotateout. Make the adjustments mid needle with theuntil slide its in slottedthe open position. needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE 2 Needle Idle Screw head is ush with the carburetor body. This is the Fuel Tank Side High speed needle position30° when as needed. This 5 Fuel Deliver fuel to the carburetor standard position. starting the engine. procedure will be repeated Open Close OpenLow Speed NeedleClose Close7 the high speed 30º several times throughout First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE 5-1 Needle the break-in process.
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