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View Full Version : Engines and Mufflers

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  1. OS 50 Hyper Piston Blown
  2. OS-55 ring replacement
  3. Strange Problem
  4. Crankshaft and loctite
  5. YS 56R trouble to running this engine cold need help?
  6. YS SR3c or YS srs
  7. OS91HZ-R 3C/3D
  8. OS 91HZ-R/Speed HZ-R head shims?
  9. OS 55 keeps pushing glow filaments up.
  10. Does anyone convert four-stroke to heli ?
  11. OS 55 Bearing Replacement
  12. Broken bearing retainer, burnt glow plug, not burning much fuel. which came first?
  13. OS 91HZ PS - tuning at altitude
  14. curtis youngblood on an OS91
  15. OS 50 SXH Hyper not burnng all the fuel
  16. Air Filter?
  17. OS 50 Egine Bearings
  18. OS 91 leans out then quits - how to troubleshoot?
  19. Silicon Tube
  20. Spares for TT53 same as OS50 ( pistonring)
  21. HZ-R diaphragm
  22. YS91 SR issue
  23. YS 50
  24. YS-56SR Needle Tuning
  25. OS speed or YS 3DS.. What do you think..