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  1. OS .12 TR (P) needle settings?
  2. os 91fs cuts out during flight
  3. OS 70 crank shaft
  4. crank-50sx vs 50sxh
  5. OS 91 FX which prop for slow flight/torque?
  6. Size for carb screws
  7. O.S. FT-160 Twin
  8. Suggestion for OS 2-stroke muffler improvement
  9. OS 50 SX and OS 50SXH Problem?
  10. Replace conrod and piston pin os21 VF-BR
  11. Propeller Shaft - O.S. 70 Surpass
  12. Where to buy new needle for 46 FX
  13. OS 50SX Carb problem, need help.
  14. Ring for OS 50
  15. OS .65 marine engines
  16. 1.60 overheating ?
  17. prop size and rpm
  18. loose muffler
  19. Loose manifold
  20. OS70 SurpassII Carby
  21. 140 FI. How do I reset EC1
  22. no NV response on OS46FA
  23. Gemini Question
  24. 91FX rpm
  25. 120 SURPASS DOWN ON POWER?
  26. 91 fx break in
  27. FX 61
  28. older 61 fourstroke
  29. OS .91 SX-H
  30. BGX-1 3500 wont run vertical help
  31. OS 70 Ultimate
  32. 61 FX idle adjustment keeps changing
  33. FT-300
  34. OS .40 Surpass 4-stroke problem
  35. OS 91 Surpass II Max RPM and Tach Setting?
  36. O.S. .91 Surpass I carb settings and beginners questions.
  37. .46 ax sllimline muffler
  38. OS Max .10 orientation
  39. OS 91 Surpass Idle Problem
  40. thread size on .52 4s
  41. OS7D Carb Setting
  42. OS .91 FSR
  43. OS120 SIII RPM
  44. Practical rpm vs Rated Power
  45. OS 91 FX exhaust pipe
  46. Tuned pipe for 50 SX
  47. New 91 4-stroke crankcase vent strategy?
  48. OS 15 CL conversion?
  49. Break in FS-91 SII
  50. FX91 mixture problem
  51. Prop for 0s50 sx
  52. what causes this
  53. OS FS-91 Idle settings problem
  54. OS #743 muffler
  55. Need some help Bax!!!
  56. Breaking in a .61 FX
  57. OS 61 RFP ABC
  58. os .26 and .40 4 stroke car engines q's
  59. OS 46 C/L venturi diameter
  60. os fs90 fourstroke
  61. OS 91 FS engine quits
  62. OS 61FX Air Filter?
  63. OS 70 Ultimate
  64. OS BGX
  65. os 1.08 breakin
  66. Needle valve location OS 160
  67. O.S 1.60
  68. 30% CoolPower us in 4-strokes
  69. Electronic copy of instructions for O.S. 60 four-stroke engine
  70. OS FS 120 WITH INCLINED ROCKERS INSTRUCTIONS
  71. OS 32H Question
  72. OS 91 Surpass Exhaust header breaks
  73. Is there a .25 AX on the way?
  74. OS 46FX muffler screw
  75. OS 1.60 bearings
  76. Help, was this my fault or OS's?
  77. Muffler back pressure
  78. propeller for OS 30
  79. 90FS Ring Gap
  80. 15 CVA cover plate
  81. LA65 Header pipe
  82. OS .32 Fabc
  83. 61RF-P ABC prop questions
  84. OS FT 300
  85. Cowled OS 91 FX
  86. Problem with OS 26 FS
  87. FS-91 Surpass II - Black residue on the inside-top of fuel tank after running in
  88. OS 61 MAX SF Pumped
  89. OS 90 needle valve and o ring
  90. tank pressure
  91. fuel?
  92. Rumors of an .18
  93. Varnish or Rust?
  94. 61FX pitts muffler
  95. OS 1.08
  96. vz-rz interchange?
  97. MOVED: Need an O.S. FS61 Marine engine
  98. OS .21VZ-B Premature Wear Problems - Please Advise
  99. OS .60 FP RN
  100. Beginner: Cannot Start O.S. .46 LA
  101. OS300 4stroke twin
  102. O.S. Max FP 40
  103. Proper Break-In for an O.S. 25 fx
  104. Prop for OS 300 4stroke twin
  105. OS 50SHX-H
  106. Installing valves in cylinder head
  107. Rumor on the .46 FX
  108. OS FX 91 problems
  109. Hard to tune
  110. owners and parts manual, o s 61 sf
  111. 91 FX knocking
  112. .91 4-stroke exhaust pipe size
  113. OS FS 48 Surpass
  114. O.S. Carburetor #6B .61 SFN-H
  115. OS 61 FSR Carb question/replacement
  116. Bearings
  117. O.S. 46 FS
  118. OS FS-91 Removing the bearings
  119. Question about the Hanno Specials
  120. OS 120 FS SURPASS W/PUMP PLUMBING?
  121. Replacement Piston Ring
  122. OS 120 FSIII w/pump
  123. OS 300 4 stroke twin
  124. OS 160 FX Crank Case Tap?
  125. 140RX throttle linearity
  126. Great Service
  127. Tuning 120 fs surpass
  128. 3 View Outline ??
  129. Timing on O.S. .91SF Surpass
  130. .15FP CL vs RC question
  131. OS 108, Remote needle?
  132. OS .46 LA
  133. OS 108
  134. the 46ax
  135. OS 1.60FX Fuel choices
  136. OS FP/LA interchangability
  137. having problems with OS 91FX
  138. Help for parts for a 90 FSR?
  139. OS 61 SF Burning Plugs
  140. Os 140 rx
  141. OS 140RX
  142. OS 60 FR Muffler??
  143. Bax - Hobby Services inability to repair older OS engines??
  144. OS 160 Cant Get It Rich
  145. OS parts
  146. Parts for discontinued engine
  147. 91FX and a Bisson Pitts Muffler
  148. OS 48FS choke valve interchangability
  149. Hanno Special Header Length
  150. OS Max H
  151. OS 1.60 FX SPINNER ADAPTOR ?????
  152. Is my 46fx liner peeling?
  153. OS-32SX-H question
  154. Hanno Special Plug?
  155. 50 sx-h ring
  156. FX91-What fuel tubing size?
  157. o.s. 50 sx air bubbles
  158. having problems with tuning of O.S .61FX
  159. Setting up an O.S. 160FX
  160. Screw Size 46 LA
  161. i need to know what do i need to turn my os .12 cv into a pull start
  162. 2 questions about my os 40 la
  163. OSMax 12 CZ-Z problem
  164. Temperature of engines?
  165. OS 40Max-H My first engine teardown-help!
  166. OS 46LA...only as powerful as a 40?
  167. OS .46 FX Issue
  168. .91 FSR Parts Sources...
  169. OS 91 FS II pump
  170. OS91 - Dry rear bearing
  171. Problems with MAX 61FX
  172. OS FX .46 Getting Tired?
  173. OS 90FS FOUR STROKE ENGINE IDLE SETTING
  174. Info on FS120S II
  175. parts exchangeability
  176. HELP!! MY OS 50SX ISN'T RUNNING PROPERLY!
  177. Storage of OS 120FS with pump
  178. OS 46 FX Problem
  179. .61SF-P pump nipple broken
  180. OS #743 muffler replacement that fits?
  181. pre detonating OS 1.6
  182. OS 50 w/ 60 Carburetor
  183. OS 61RF-P
  184. OS 40 LA Airbleed setting
  185. OS Rotary engine
  186. O.S. 50 SX air bubbles
  187. os 48 compression loss
  188. OS 120 FS Question
  189. Question about service turn around time
  190. FS 70 Ultimate Availability
  191. OS 91 getting richer on idle
  192. OS 160 Fuel ?
  193. OS LA40 Carb Repair
  194. O.S. .91 FX
  195. OS FS-52 Throbbing
  196. 91 FX idle
  197. OS 70 S II Question
  198. Rusted stuff
  199. os 70 heli engine piston explodes
  200. OS 40 LA Power
  201. OS 91 Surpass question
  202. 52 4/C won't draw fuel
  203. LA 0.40 RPM's running away from me.
  204. OS MAX RZ compression
  205. OLD vs NEW OS 46 FX
  206. OS 140RX Rich in Midrange
  207. OS 1.60 Prop
  208. OS 25 MAX FP
  209. FS-120 (non-surpass) Performance Specifications
  210. FS 48 Surpass
  211. New or Old OS - How do you tell?
  212. ring job
  213. Four stroke mufflers
  214. .46FX to .50SX Upgrade ... help please ...
  215. OS FT-300 FOR MY PITTS SPECIAL
  216. Newly Broken In OS 46 FX
  217. Remote needle valves in os .50 SX and .91 FX
  218. OS 61 FS Muffler?
  219. Can I Make My .61FX a .91?
  220. 40 SR parts
  221. bubbles!! ehhh!
  222. O.S. .61 SX-H Heli Engine- HEIM Mechanics Setup
  223. Tried everything, 46 NV still leaks?
  224. os 46fx..need serious help
  225. OS 40 No compression
  226. OS Max SR-40 Marine - what muffler?
  227. Main bearing broke
  228. Manual for a Max .61 SF?
  229. Tri prop for OS FS70
  230. How to send an item to service
  231. About this Forum
  232. fx 61 loosing power
  233. engine help
  234. OS 91 Surpass-version I
  235. O.S. 25FX and O.S. 25SF
  236. New 91FX muffler missing baffle
  237. OS 91 FX very slow to idle down
  238. os Wankel 1800
  239. OS 91 FX
  240. O.S. 1.08 FSR
  241. I lost a muffler bolt on my 46 fx
  242. Corrosion on piston/cylinder and crank
  243. Port timing 91FX Vs 91SxH
  244. 25 la....
  245. FS-120 surpass fuel setup
  246. 0.s.15 cv-rx refusing to keep running
  247. OS 46 SF
  248. FS-70 header pipe broke on run-in
  249. Pressure Tap OS 91FX
  250. OS60 MAX-H

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