Owner's Manual
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OWNER’S MANUAL Traxxas Note: This manual covers TRX 3.3, TRX 2.5, and TRX 2.5R Racing Engines. Some photos 1100 Klein Road show the engine equipped with optional accessories, such as the EZ-Start system, headers, Plano, Texas 75074 and engine mounts, that are not included in the engine package. See the end panel of the Phone: 972-265-8000 engine box for exact contents based on your engine model number. Toll-free 1-888-TRAXXAS BEFORE YOU PROCEED Internet Traxxas.com Carefully read and follow all instructions in this and any accompanying materials to E-mail: [email protected] prevent serious damage to your engine. Failure to follow these instructions will be considered abuse and/or neglect. Entire contents ©2013 Before running your engine, look over this entire manual and examine the engine carefully. Traxxas. Traxxas, Top Fuel, If for some reason you decide it is not what you wanted, then do not continue any further. and Ready-To-Race are Your hobby dealer absolutely cannot accept an engine for return or exchange after it trademarks or registered trademarks of Traxxas. Other has been run. brand names and marks Warnings, Helpful Hints, & Cross-References are the property of their Throughout this manual, you’ll notice warnings and helpful hints identified by the icons respective holders and are used only for purposes of below. Be sure to read them! identification. No part of this manual may be reproduced An important warning about personal safety or avoiding or distributed in print or damage to your engine and related components. electronic media without the express written permission Special advice from Traxxas to make things easier and more fun. of Traxxas. Refers you to a page with a related topic. 2 • TRX ENGINES SUPPORT 4 SAFETY PRECAUTIONS If you have any questions about your engine or its operation, call the Traxxas Technical Support Line toll-free at: 1-888-TRAXXAS (1-888-872-9927)* 5 INTRODUCTION Technical support is available Monday through Friday from 8:30am to 9:00pm central time. 6 TRX RACING Technical assistance is also available at Traxxas.com. You may also e-mail customer support ENGINE ILLUSTRATED with your question at [email protected]. Join thousands of registered members in our 7 TERMS TO KNOW online community at Traxxas.com. 11 THE FUEL Traxxas offers a full-service, on-site repair facility to handle any of your Traxxas service needs. Maintenance and replacement parts may be purchased directly from Traxxas by phone or 14 THE AIR FILTER online at BuyTraxxas.com. You can save time, along with shipping and handling costs, by 16 THE CARBURETOR purchasing replacement parts from your local dealer. 19 BREAKING-IN YOUR Do not hesitate to contact us with any of your product support needs. We want you to be TRX RACING ENGINE thoroughly satisfied with your new engine! 25 TUNING YOUR TRX REGISTERING YOUR MODEL RACING ENGINE In order to serve you better as our customer, please 29 TROUBLESHOOTING register your product within 10 days of your purchase YOUR TRX RACING ENGINE online at Traxxas.com/register. Traxxas.com/register 33 MAINTAINING AND STORING YOUR TRX RACING ENGINE 36 REBUILDING YOUR TRX RACING ENGINE 42 INDEX *Toll-free support is available to U.S. residents only. TRX ENGINES • 3 SAFETY PRECAUTIONS All instructions and SAFETY PRECAUTIONS precautions outlined All of us at Traxxas want you to safely enjoy your new TRX Racing Engine. Operate in this manual should be your TRX Racing Engine sensibly and with care, and it will be exciting, safe, and fun strictly followed to ensure for you and those around you. Failure to operate your TRX Racing Engine in a safe and safe operation of your responsible manner may result in property damage and serious injury. The precautions TRX Racing Engine. outlined in this manual should be strictly followed to help ensure safe operation. You alone must see that the instructions are followed and the precautions are adhered to. • Model engine fuel is dangerous and highly poisonous. Always follow all directions TRX Racing Engines and precautions printed on the fuel container. Model engine fuel is poisonous to are not intended for humans and animals. Drinking the fuel can cause blindness and death. Handle with use by children under 16 care and respect. years of age without the supervision of a responsible • Model engine fuel, especially when in a fuel dispensing bottle, may look like a cool and knowledgeable adult. drink to a child. Keep all fuel out of the reach of children at all times. Do not place fuel containers on the ground where children can reach them while you are driving. • Model engine fuel is flammable. Never allow smoking, sparks, heat, or flame in the presence of fuel or fuel vapors. • The engine and exhaust system may become extremely hot during use. Be careful not to touch these parts, especially when refueling or stopping the engine. • Prolonged exposure to the engine exhaust can be harmful. Avoid breathing the engine exhaust. Always run your nitro model outdoors, in a well-ventilated area. Never run the engine indoors. • The engine can be loud. If the noise makes you uncomfortable, wear ear protection. Be considerate of your neighbors by not running your model early in the morning or late in the evening. • Most importantly, use good common sense at all times. 4 • TRX ENGINES INTRODUCTION INTRODUCTION Traxxas strongly TRX Racing Engines are the next generation of TRX nitro power. The larger displacement discourages changing and advanced porting generate class-leading horsepower while still maintaining the or modifying any part of TRX Racing Engine characteristics of broad, linear power delivery and ease of tuning. your TRX Racing Engine. Old Focused engineering and rigorous testing have yielded unprecedented power and tech tips and tricks that may have boosted the power of uncompromising performance that turns ready-to-run into Ready-To-Race®. other engines could seriously TRX Racing Engines take a total-system approach. Each part of the engine, from the air diminish the performance of filter to the exhaust tip, is carefully engineered to work in harmony with other engine your TRX Racing Engine. components. Each part complements the next, to extract maximum power. TRX Racing Engines are designed to be tolerant of variations in tuning and running through a wide There’s more advanced thinking, development, range of variable atmospheric conditions, such as changes in temperature, humidity, and and testing in the stock altitude. parts of your TRX Racing TRX Racing Engines are manufactured to exacting tolerances and require a specially- Engine than in many designed break-in procedure to accomplish the final precision fitting of the internal aftermarket manufacturer’s engine components. It is very important that you follow the new break-in procedure as so-called performance parts. TRX Racing Engines are closely as possible to achieve the best performance and longest life from your TRX Racing already some of the most Engine. Old style break-in procedures, such as simply running the engine with a very rich powerful engines in their fuel mixture for the first 4 tanks of fuel, will not achieve the best results. Follow the steps class and simply will not in this manual to successfully break in your TRX Racing Engine. benefit from average, low- A routine maintenance schedule is also required to keep your TRX Racing Engine in tech, aftermarket bolt-on performance items. top running condition. Cleaning the air filter after each hour of running is particularly important. Also, it is extremely important to perform after-run maintenance on the engine to prevent corrosion of the internal engine components (see page 34). TRX ENGINES • 5 TRX RACING ENGINE ILLUSTRATED Head Protector Air Filter Glow Plug Base PowerTune™ Head (Cylinder Head) Pull Starter (if equipped) Idle Speed Air Filter Adjustment Screw Housing High-Speed Needle Fuel Intake Optional Air Intake Backplate (if equipped) Carburetor Flywheel* Low-Speed Needle Crankshaft Crankcase Clutch Bell* Throttle Arm 6 • TRX ENGINES *not included (TRX 3.3 Engine shown. Other TRX Racing Engines are very similar.) TERMS TO KNOW TERMS TO KNOW Carb - Abbreviation for carburetor. You’ll find these Nitro R/C engine terms throughout this Carburetor - The carburetor atomizes (mixes) the fuel with section of the manual. the air so that the engine can burn it. There are two types .15 - .15 or “15” refers to the displacement of the engine. of carburetors; slide carbs and barrel carbs. TRX Racing The TRX 2.5 Racing Engine is .15 cubic inches or 2.5 cubic Engines use the superior slide carburetor design. centimeters (cc). The name “TRX 2.5” is derived from the cc Clean-out - Cleaning-out is a condition that occurs when measurement. the engine is accelerating and the fuel mixture becomes .20 - .20 or “20” refers to the displacement of the engine. The sufficiently lean to allow the engine to continue into its TRX 3.3 is .20 cubic inches or 3.3 cubic centimeters (cc). The upper RPM power band. It is usually characterized by a name “TRX 3.3” is derived from the cc measurement. noticeable decrease in blue exhaust smoke and a dramatic increase in engine speed. ABC - Abbreviation for aluminum, brass, and chrome. Refers to engine construction that consists of an aluminum Combustion chamber - The combustion chamber is piston that slides in a chrome-plated brass sleeve. machined into the bottom of the cylinder head. This is where the glow plug ignites the fuel. The shape of Air filter - The air filter sits atop the carburetor and prevents the combustion chamber is designed to promote more harmful dust and dirt from entering the engine.