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