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O'Donnell SS .21 Manual

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Summary of Contents for O'Donnell SS .21

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Thank you for purchasing the O’Donnell SS .21 engine. Many years of engine expertise were used to develop an engine with maximum performance and reliability. This engine was manufactured using the highest quality standards, materials and manufacturing processes.

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS • Model engine fuel is poisonous. Make sure you read and follow all of the precautions on the fuel container. • Keep fuel out of the reach of children. • Model engine fuel is fl ammable and when ignited has a fl ame that is diffi...

  • Page 4: Important Information

    • Make sure you keep your vehicles fuel tank free of dirt and debris. • Make sure your vehicle’s clutch is in good working order before installing it onto the SS .21. Periodically check your clutch to ensure optimal performance.

  • Page 5: Fuel

    • We recommend that you install new fuel tubing on your vehicle before installing the SS .21. This will help prevent problems related to old or torn fuel tubing. • We highly recommend a quality fuel fi lter be used between the vehicle’s fuel tank and the SS carburetor.

  • Page 6: Air Filter

    We recommend that you clean and re-oil your air fi lter regularly and always use a quality air fi lter oil. • The SS .21 comes with an O’Donnell 97T glow plug. After extensive testing, Steve O’Donnell has found that this plug gives you maximum performance and superb durability.

  • Page 7: Tuned Pipe

    R2 tuned pipe helps the engine achieve maximum performance, with a smooth, broad power band. CARB RESTRICTORS • The SS .21 comes with a 7mm restrictor installed in the carburetor. • For increased performance, install the included 8mm restrictor. The engine will need to be re-tuned after...

  • Page 8: High Speed Needle

    Setting the idle too high can cause damage to the clutch. Setting the idle too low can cause the engine to stall frequently. The factory needle settings for the SS .21 are: High Speed: 2-1/2 turns out Low Speed: 1-1/2 turns out...

  • Page 9: Priming The Engine

    PRIMING THE ENGINE We recommend that you prime your engine before starting it. While holding the throttle open, place your fi nger over the muffl er outlet on the tuned pipe and turn the engine over using a starter box for 3–5 seconds or until fuel reaches the carburetor.

  • Page 10: Engine Break-In

    ENGINE BREAK-IN It is critical that you properly break-in your SS .21. Proper break- in will help ensure optimal fi t between critical engine components and help prevent premature wear. Proper break-in will help obtain maximum performance. • It is recommended to NOT run the body on your vehicle during break-in.
  • Page 11 Tanks 1-4: Start the engine and run the vehicle approximately 100 feet back and forth or in a fi gure eight. Do not squeeze the throttle more than 1/2-way. Every 4-6 passes check the engine temp making sure that it does not go over 170° Fahrenheit. Continue this procedure for the fi...

  • Page 12: Engine Maintenance

    ENGINE MAINTENANCE To increase the life of your SS .21 it is critical that you properly maintain your engine. • Before each run check that your air fi lter is clean and properly oiled. • Occasionally check your fuel fi lter and remove any dirt or debris that may have accumulated.
  • Page 13 CARB PARTS & VIEW Carburator Assembly Complete ......ODOG6010 Carb Slide Ball Clamp .......... ODOG6025 Low Speed Needle w/O-Rings ......ODOG6095 Low Speed Needle O-Ring........ODOG6105 Slide Valve ............ODOG6024 Carb Slide Boot ............ ODOG6027 Carburetor Body ........... ODOG6010 Carburetor O-Ring ..........ODOG6105 Carburetor Drawbar w/O-Ring ......

  • Page 14: Replacement Parts

    REPLACEMENT PARTS 20 Cylinder Head Screw 3.5 x 14mm (4) ....ODOG6120 21 Cylinder Head ............ODOG6056 22 Cylinder Head Button Turbo ......... ODOG6061 22 Cylinder Head Button Standard ......ODOG6062 23 Cylinder Head Shim (2) ........ODOG6068 24 Cylinder Sleeve & Piston ........ODOG6071 25 Wrist Pin Set ............
  • Page 15 EXPLODED VIEW...
  • Page 16 WARRANTY & REPAIR SERVICE O’Donnell will warrant this engine for 90 days after the purchase from defects in materials or workmanship. O’Donnell will either repair or replace, at no charge, the incorrectly made part. (Please note: O’Donnell engines are manufactured to the highest standards using only the very best materials.

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