Summary of SS .21
Page 1
1 e n g i n e e n g i n e.
Page 2: Table of Contents
2 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. When properly use...
Page 3: Safety Precautions
3 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 cult to see. Avoid sparks, fl ames, smoking or an...
Page 4: Important Information
4 important information • make sure you properly tighten the fl ywheel/collet onto the engine. We recommend using a fl ywheel wrench and a 10mm socket. Do not put something in the exhaust to prevent the engine from turning over. • make sure you keep your vehicles fuel tank free of dirt and debris. •...
Page 5: Fuel
5 fuel • we recommend o’donnell 20% or 30% racing fuel be used whenever possible. If at any time during the life of the engine you change fuel, either the percentage of nitromethane or brand, we recommend that you set the carburetor needles back to the stock settings to help prevent possible damage ...
Page 6: Air Filter & Glow Plugs
6 air filter & glow plugs • it is very important that you use a quality air fi lter like the o’donnell odoc1525 air fi lter. It is also just as important that you properly maintain it. Using an air fi lter that is overly dirty, torn, improperly oiled or worn out could allow dirt to be ingested, whic...
Page 7: Tuned Pipe
7 tuned pipe 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 changing the carburetor restrictor (richer mixture). After extensive testing steve o’donnell...
Page 8: Needle Settings
8 needle settings the high speed needle (a) controls the amount of fuel entering the engine when the carburetor is fully open. Turning the high speed needle counterclockwise (richer) allows more fuel to enter the engine. Turning the high speed needle clockwise (leaner) allows less fuel to enter the ...
Page 9: Priming The Engine
9 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. Do not install your glow ...
Page 10: Engine Break-In
10 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 d...
Page 11
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 rst four tank...
Page 12: Engine Maintenance
12 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. • keep the outsi...
Page 13: Carb Parts & View
13 carb parts & view carburator assembly complete ........................... Odog6010 1 carb slide ball clamp .......................................... Odog6025 2 low speed needle w/o-rings ............................. Odog6095 3 low speed needle o-ring................................... Odog6105...
Page 14: Replacement Parts
14 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 .............................
Page 15: Exploded View
15 exploded view.
Page 16: Warranty & Repair Service
Copyright © 2009 odog5010mnl v1.1 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 t...