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View Full Version : Engines and Mufflers

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  1. Nearly stripped OS 50 hyper backplate thread - Fixes?
  2. How can I tell if the bearing is bad?
  3. Cant find power from my new OS91hz
  4. Sputtering SR
  5. New OS 50 engine starting problems
  6. Nitro Engine Air Filters?
  7. OS 91HZ-PS Temps??
  8. O.S 55HZ Hyper
  9. OS Engine Warranty is Useless
  10. YS91SR-RR??
  11. just wondering
  12. OS50-H tuning issue.
  13. Starter Battery Packs?
  14. YS91SR3C-RR and AR7100R
  15. YS91SR or YS91SR3C?
  16. Cash for OS Clunker Program! (Not a joke)
  17. Redline 53H may need extra shim for 30%
  18. Spektrum backplate sensor mounting on OS 91HZ non pump
  19. OS 91 HZ ( TREX 700)
  20. Bearing symptoms??? ... what are they ???
  21. TT Redline Main needle dropout during 3rd flight
  22. Os 91 Szh pump on 91Hz motor
  23. which plug to use?
  24. OS Engine Support - $75 to replace a 2 month old engine
  25. cy mp6 90 work with 91sr?