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  1. OS 140RX
  2. OS 60 FR Muffler??
  3. Bax - Hobby Services inability to repair older OS engines??
  4. OS 160 Cant Get It Rich
  5. OS parts
  6. Parts for discontinued engine
  7. 91FX and a Bisson Pitts Muffler
  8. OS 48FS choke valve interchangability
  9. Hanno Special Header Length
  10. OS Max H
  11. OS 1.60 FX SPINNER ADAPTOR ?????
  12. Is my 46fx liner peeling?
  13. OS-32SX-H question
  14. Hanno Special Plug?
  15. 50 sx-h ring
  16. FX91-What fuel tubing size?
  17. o.s. 50 sx air bubbles
  18. having problems with tuning of O.S .61FX
  19. Setting up an O.S. 160FX
  20. Screw Size 46 LA
  21. i need to know what do i need to turn my os .12 cv into a pull start
  22. 2 questions about my os 40 la
  23. OSMax 12 CZ-Z problem
  24. Temperature of engines?
  25. OS 40Max-H My first engine teardown-help!
  26. OS 46LA...only as powerful as a 40?
  27. OS .46 FX Issue
  28. .91 FSR Parts Sources...
  29. OS 91 FS II pump
  30. OS91 - Dry rear bearing
  31. Problems with MAX 61FX
  32. OS FX .46 Getting Tired?
  33. OS 90FS FOUR STROKE ENGINE IDLE SETTING
  34. Info on FS120S II
  35. parts exchangeability
  36. HELP!! MY OS 50SX ISN'T RUNNING PROPERLY!
  37. Storage of OS 120FS with pump
  38. OS 46 FX Problem
  39. .61SF-P pump nipple broken
  40. OS #743 muffler replacement that fits?
  41. pre detonating OS 1.6
  42. OS 50 w/ 60 Carburetor
  43. OS 61RF-P
  44. OS 40 LA Airbleed setting
  45. OS Rotary engine
  46. O.S. 50 SX air bubbles
  47. os 48 compression loss
  48. OS 120 FS Question
  49. Question about service turn around time
  50. FS 70 Ultimate Availability
  51. OS 91 getting richer on idle
  52. OS 160 Fuel ?
  53. OS LA40 Carb Repair
  54. O.S. .91 FX
  55. OS FS-52 Throbbing
  56. 91 FX idle
  57. OS 70 S II Question
  58. Rusted stuff
  59. os 70 heli engine piston explodes
  60. OS 40 LA Power
  61. OS 91 Surpass question
  62. 52 4/C won't draw fuel
  63. LA 0.40 RPM's running away from me.
  64. OS MAX RZ compression
  65. OLD vs NEW OS 46 FX
  66. OS 140RX Rich in Midrange
  67. OS 1.60 Prop
  68. OS 25 MAX FP
  69. FS-120 (non-surpass) Performance Specifications
  70. FS 48 Surpass
  71. New or Old OS - How do you tell?
  72. ring job
  73. Four stroke mufflers
  74. .46FX to .50SX Upgrade ... help please ...
  75. OS FT-300 FOR MY PITTS SPECIAL
  76. Newly Broken In OS 46 FX
  77. Remote needle valves in os .50 SX and .91 FX
  78. OS 61 FS Muffler?
  79. Can I Make My .61FX a .91?
  80. 40 SR parts
  81. bubbles!! ehhh!
  82. O.S. .61 SX-H Heli Engine- HEIM Mechanics Setup
  83. Tried everything, 46 NV still leaks?
  84. os 46fx..need serious help
  85. OS 40 No compression
  86. OS Max SR-40 Marine - what muffler?
  87. Main bearing broke
  88. Manual for a Max .61 SF?
  89. Tri prop for OS FS70
  90. How to send an item to service
  91. About this Forum
  92. fx 61 loosing power
  93. engine help
  94. OS 91 Surpass-version I
  95. O.S. 25FX and O.S. 25SF
  96. New 91FX muffler missing baffle
  97. OS 91 FX very slow to idle down
  98. os Wankel 1800
  99. OS 91 FX
  100. O.S. 1.08 FSR
  101. I lost a muffler bolt on my 46 fx
  102. Corrosion on piston/cylinder and crank
  103. Port timing 91FX Vs 91SxH
  104. 25 la....
  105. FS-120 surpass fuel setup
  106. 0.s.15 cv-rx refusing to keep running
  107. OS 46 SF
  108. FS-70 header pipe broke on run-in
  109. Pressure Tap OS 91FX
  110. OS60 MAX-H
  111. Bax - OS .10 FSR Con Rod Substitute??
  112. FS90 head stripped
  113. Looking for OS FS-26 Info ...
  114. 46FX - engine rpm up and down at full throttle
  115. Prop Choice
  116. OS 120 w/pump instruction manual needed
  117. OS 120 Surpass I power loss
  118. OS 50 sx Sucking air?
  119. Brass hexagon inlet holder position??
  120. Liner pealing
  121. O.S. 46FX Engine temp
  122. Wankel woes
  123. OS FS-70S head
  124. OS 50 SX making strange noise
  125. 46 LA Prop spun off during break-in run
  126. I'm a newb: OS Max SF 61 With Pump
  127. OS 160FX Bearing Problems?
  128. fx160 needle setting?
  129. OS120 Surpass I Bearings & Gasket Q?
  130. Os .15 Cva
  131. Aeroworks Extra 300L Profile ARF + OS BGX-1 (3500)
  132. Os70 Sz-h Ring
  133. help with surpass 70
  134. oil content and type
  135. Warranty service on OS.91FX, turn around time??
  136. os max 40fp + glow plug
  137. New OS 91 SX acro?
  138. Help with disassemble of OS 120 FS
  139. Position of Fuel Tank
  140. O.S .12 TR(P)-T help.
  141. OS FX 1.60 + Top Flight 18x10
  142. O.S. 32 sx-h gradually lost power
  143. OS 140 RX Bearing
  144. Valve clearence for OS 91 Surpass?
  145. os 300 twin mounting
  146. Surpass 70
  147. Is the Tower plug same as the OS #8???
  148. OS 1.08 low end needle problems
  149. O.S. .46fx
  150. OS .46 fx muffler
  151. 1.60FX Needle Valve replacement
  152. os 61 h wc start off fuel settings
  153. O.S.70B Mixture Control Carb
  154. OS carb # 7DV
  155. OS 46 fx
  156. which muffler?
  157. OS 120 Surpass II head gaskets
  158. 120 Surpass II running lean and needle valve screwed all the way out!?
  159. OS 120 Surpass III optional header
  160. Turnaround time at O.S.
  161. Replacement of my 91FX (Bax)
  162. os 46 fx doesnt turn
  163. 91 Fx
  164. OS 91 MAX Muffler wanted.
  165. the perfect propeller is...
  166. O.S. FS-120S-E Carb leakage
  167. OS FS 91 4 Stroke
  168. 48 surpass compression loss
  169. Ff-240
  170. .21 Rg M
  171. .21 outboard
  172. OS 120 II idle problem
  173. valve adjustment screw
  174. OS screws
  175. 160FX midrange lean condition
  176. OS 91 Fx Quits in mid Range.
  177. Os 160
  178. OS 40 four stroke surpass, idle prob !
  179. os 32 sx
  180. 140Rx & 140EFI Rear Bearings
  181. 40 LA with poor fuel flow (I think)
  182. Torque specs for cyl head screws?
  183. O.S. fuel
  184. advice on Surpass 120 back bearing
  185. O.S. .12 cv-r stalls
  186. OS Max 61FX
  187. 50SX (non-H) on Heli Fuel?
  188. OS .46fx liner peeling?
  189. perry pump on back plate
  190. Os 46sf-p Abc
  191. OS .61 FX missing part?
  192. 46fx breakin
  193. 25LA Problem
  194. OS 50SX Break in ?
  195. 61 FSR carb
  196. starting my o.s..15 cv-x
  197. OS .15 CV probs
  198. OS120III Surpass regulator leaking
  199. In cowl Muffler for 91FX
  200. What prop for OS .46 FX?
  201. Quick question!
  202. OS .40 FP Questions
  203. Response pour over the 46 FX
  204. fx 160
  205. OS FS26S Engine Knocking
  206. OS 40 Surpass C
  207. 91fx mufler
  208. cone baffle ?
  209. We all have some loose screws..
  210. HELP ME! 1.08 FSR Special exhaust?
  211. Antifreez Engine Cleaning Question
  212. o.s. 12 cv-r parts
  213. OS .61FSR ABC Stalling
  214. Unused os max 45fsr-need break-in-is it ABC?
  215. New Os50sx Problem
  216. Os91sx
  217. Getting a used FT-160 Gemini to run
  218. What OS 120 do I have?
  219. Nut for muffler; 40 FSR?
  220. .70 Surpass Timing ?
  221. .61 V parts needed
  222. Manual for OS .61 SF-H
  223. OS 52 Surpass
  224. engine
  225. Fr5-300
  226. Surpass 120 E
  227. OS 61 RFP vs Hanno Special
  228. OS FS-120 Surpass-II with a pump
  229. How to remove and install valve springs from OS FS120SIII with pump?
  230. Need correct part number for thrust washer
  231. A few Questions, and My .46 FX needs rebuilding...
  232. 30% Nitro in OS .32
  233. Couple questions
  234. OS 61 Hanno pump settings?
  235. OS .46Fx damage
  236. 40 & 46 Mounting
  237. OS 50 SX dead sticks
  238. OS FT-120, older model twin...
  239. O.S. .46fx Probs
  240. noisy LA .46
  241. Slimline pitts muffler on 120 III pumped
  242. OS .15 CV-A Slow RPMs???
  243. OS LA 46 not running well
  244. 160 FX issue
  245. 120 III pumped exhaust headers
  246. os 91 surpass
  247. Problem controll on OS52FS
  248. 50 sx max rpm
  249. Os 50sx
  250. os 40 fx question