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  1. OS50SX...Very Strange problem!!!
  2. OS .12 TR (P) needle settings?
  3. os 91fs cuts out during flight
  4. OS 70 crank shaft
  5. crank-50sx vs 50sxh
  6. OS 91 FX which prop for slow flight/torque?
  7. Size for carb screws
  8. O.S. FT-160 Twin
  9. Suggestion for OS 2-stroke muffler improvement
  10. OS 50 SX and OS 50SXH Problem?
  11. Replace conrod and piston pin os21 VF-BR
  12. Propeller Shaft - O.S. 70 Surpass
  13. Where to buy new needle for 46 FX
  14. OS 50SX Carb problem, need help.
  15. Ring for OS 50
  16. OS .65 marine engines
  17. 1.60 overheating ?
  18. prop size and rpm
  19. loose muffler
  20. Loose manifold
  21. OS70 SurpassII Carby
  22. 140 FI. How do I reset EC1
  23. no NV response on OS46FA
  24. Gemini Question
  25. 91FX rpm
  26. 120 SURPASS DOWN ON POWER?
  27. 91 fx break in
  28. FX 61
  29. older 61 fourstroke
  30. OS .91 SX-H
  31. BGX-1 3500 wont run vertical help
  32. OS 70 Ultimate
  33. 61 FX idle adjustment keeps changing
  34. FT-300
  35. OS .40 Surpass 4-stroke problem
  36. OS 91 Surpass II Max RPM and Tach Setting?
  37. O.S. .91 Surpass I carb settings and beginners questions.
  38. .46 ax sllimline muffler
  39. OS Max .10 orientation
  40. OS 91 Surpass Idle Problem
  41. thread size on .52 4s
  42. OS7D Carb Setting
  43. OS .91 FSR
  44. OS120 SIII RPM
  45. Practical rpm vs Rated Power
  46. OS 91 FX exhaust pipe
  47. Tuned pipe for 50 SX
  48. New 91 4-stroke crankcase vent strategy?
  49. OS 15 CL conversion?
  50. Break in FS-91 SII
  51. FX91 mixture problem
  52. Prop for 0s50 sx
  53. what causes this
  54. OS FS-91 Idle settings problem
  55. OS #743 muffler
  56. Need some help Bax!!!
  57. Breaking in a .61 FX
  58. OS 61 RFP ABC
  59. os .26 and .40 4 stroke car engines q's
  60. OS 46 C/L venturi diameter
  61. os fs90 fourstroke
  62. OS 91 FS engine quits
  63. OS 61FX Air Filter?
  64. OS 70 Ultimate
  65. OS BGX
  66. os 1.08 breakin
  67. Needle valve location OS 160
  68. O.S 1.60
  69. 30% CoolPower us in 4-strokes
  70. Electronic copy of instructions for O.S. 60 four-stroke engine
  71. OS FS 120 WITH INCLINED ROCKERS INSTRUCTIONS
  72. OS 32H Question
  73. OS 91 Surpass Exhaust header breaks
  74. Is there a .25 AX on the way?
  75. OS 46FX muffler screw
  76. OS 1.60 bearings
  77. Help, was this my fault or OS's?
  78. Muffler back pressure
  79. propeller for OS 30
  80. 90FS Ring Gap
  81. 15 CVA cover plate
  82. LA65 Header pipe
  83. OS .32 Fabc
  84. 61RF-P ABC prop questions
  85. OS FT 300
  86. Cowled OS 91 FX
  87. Problem with OS 26 FS
  88. FS-91 Surpass II - Black residue on the inside-top of fuel tank after running in
  89. OS 61 MAX SF Pumped
  90. OS 90 needle valve and o ring
  91. tank pressure
  92. fuel?
  93. Rumors of an .18
  94. Varnish or Rust?
  95. 61FX pitts muffler
  96. OS 1.08
  97. vz-rz interchange?
  98. MOVED: Need an O.S. FS61 Marine engine
  99. OS .21VZ-B Premature Wear Problems - Please Advise
  100. OS .60 FP RN
  101. Beginner: Cannot Start O.S. .46 LA
  102. OS300 4stroke twin
  103. O.S. Max FP 40
  104. Proper Break-In for an O.S. 25 fx
  105. Prop for OS 300 4stroke twin
  106. OS 50SHX-H
  107. Installing valves in cylinder head
  108. Rumor on the .46 FX
  109. OS FX 91 problems
  110. Hard to tune
  111. owners and parts manual, o s 61 sf
  112. 91 FX knocking
  113. .91 4-stroke exhaust pipe size
  114. OS FS 48 Surpass
  115. O.S. Carburetor #6B .61 SFN-H
  116. OS 61 FSR Carb question/replacement
  117. Bearings
  118. O.S. 46 FS
  119. OS FS-91 Removing the bearings
  120. Question about the Hanno Specials
  121. OS 120 FS SURPASS W/PUMP PLUMBING?
  122. Replacement Piston Ring
  123. OS 120 FSIII w/pump
  124. OS 300 4 stroke twin
  125. OS 160 FX Crank Case Tap?
  126. 140RX throttle linearity
  127. Great Service
  128. Tuning 120 fs surpass
  129. 3 View Outline ??
  130. Timing on O.S. .91SF Surpass
  131. .15FP CL vs RC question
  132. OS 108, Remote needle?
  133. OS .46 LA
  134. OS 108
  135. the 46ax
  136. OS 1.60FX Fuel choices
  137. OS FP/LA interchangability
  138. having problems with OS 91FX
  139. Help for parts for a 90 FSR?
  140. OS 61 SF Burning Plugs
  141. Os 140 rx
  142. OS 140RX
  143. OS 60 FR Muffler??
  144. Bax - Hobby Services inability to repair older OS engines??
  145. OS 160 Cant Get It Rich
  146. OS parts
  147. Parts for discontinued engine
  148. 91FX and a Bisson Pitts Muffler
  149. OS 48FS choke valve interchangability
  150. Hanno Special Header Length
  151. OS Max H
  152. OS 1.60 FX SPINNER ADAPTOR ?????
  153. Is my 46fx liner peeling?
  154. OS-32SX-H question
  155. Hanno Special Plug?
  156. 50 sx-h ring
  157. FX91-What fuel tubing size?
  158. o.s. 50 sx air bubbles
  159. having problems with tuning of O.S .61FX
  160. Setting up an O.S. 160FX
  161. Screw Size 46 LA
  162. i need to know what do i need to turn my os .12 cv into a pull start
  163. 2 questions about my os 40 la
  164. OSMax 12 CZ-Z problem
  165. Temperature of engines?
  166. OS 40Max-H My first engine teardown-help!
  167. OS 46LA...only as powerful as a 40?
  168. OS .46 FX Issue
  169. .91 FSR Parts Sources...
  170. OS 91 FS II pump
  171. OS91 - Dry rear bearing
  172. Problems with MAX 61FX
  173. OS FX .46 Getting Tired?
  174. OS 90FS FOUR STROKE ENGINE IDLE SETTING
  175. Info on FS120S II
  176. parts exchangeability
  177. HELP!! MY OS 50SX ISN'T RUNNING PROPERLY!
  178. Storage of OS 120FS with pump
  179. OS 46 FX Problem
  180. .61SF-P pump nipple broken
  181. OS #743 muffler replacement that fits?
  182. pre detonating OS 1.6
  183. OS 50 w/ 60 Carburetor
  184. OS 61RF-P
  185. OS 40 LA Airbleed setting
  186. OS Rotary engine
  187. O.S. 50 SX air bubbles
  188. os 48 compression loss
  189. OS 120 FS Question
  190. Question about service turn around time
  191. FS 70 Ultimate Availability
  192. OS 91 getting richer on idle
  193. OS 160 Fuel ?
  194. OS LA40 Carb Repair
  195. O.S. .91 FX
  196. OS FS-52 Throbbing
  197. 91 FX idle
  198. OS 70 S II Question
  199. Rusted stuff
  200. os 70 heli engine piston explodes
  201. OS 40 LA Power
  202. OS 91 Surpass question
  203. 52 4/C won't draw fuel
  204. LA 0.40 RPM's running away from me.
  205. OS MAX RZ compression
  206. OLD vs NEW OS 46 FX
  207. OS 140RX Rich in Midrange
  208. OS 1.60 Prop
  209. OS 25 MAX FP
  210. FS-120 (non-surpass) Performance Specifications
  211. FS 48 Surpass
  212. New or Old OS - How do you tell?
  213. ring job
  214. Four stroke mufflers
  215. .46FX to .50SX Upgrade ... help please ...
  216. OS FT-300 FOR MY PITTS SPECIAL
  217. Newly Broken In OS 46 FX
  218. Remote needle valves in os .50 SX and .91 FX
  219. OS 61 FS Muffler?
  220. Can I Make My .61FX a .91?
  221. 40 SR parts
  222. bubbles!! ehhh!
  223. O.S. .61 SX-H Heli Engine- HEIM Mechanics Setup
  224. Tried everything, 46 NV still leaks?
  225. os 46fx..need serious help
  226. OS 40 No compression
  227. OS Max SR-40 Marine - what muffler?
  228. Main bearing broke
  229. Manual for a Max .61 SF?
  230. Tri prop for OS FS70
  231. How to send an item to service
  232. About this Forum
  233. fx 61 loosing power
  234. engine help
  235. OS 91 Surpass-version I
  236. O.S. 25FX and O.S. 25SF
  237. New 91FX muffler missing baffle
  238. OS 91 FX very slow to idle down
  239. os Wankel 1800
  240. OS 91 FX
  241. O.S. 1.08 FSR
  242. I lost a muffler bolt on my 46 fx
  243. Corrosion on piston/cylinder and crank
  244. Port timing 91FX Vs 91SxH
  245. 25 la....
  246. FS-120 surpass fuel setup
  247. 0.s.15 cv-rx refusing to keep running
  248. OS 46 SF
  249. FS-70 header pipe broke on run-in
  250. Pressure Tap OS 91FX

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