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  1. Suggestion for OS 2-stroke muffler improvement
  2. OS 50 SX and OS 50SXH Problem?
  3. Replace conrod and piston pin os21 VF-BR
  4. Propeller Shaft - O.S. 70 Surpass
  5. Where to buy new needle for 46 FX
  6. OS 50SX Carb problem, need help.
  7. Ring for OS 50
  8. OS .65 marine engines
  9. 1.60 overheating ?
  10. prop size and rpm
  11. loose muffler
  12. Loose manifold
  13. OS70 SurpassII Carby
  14. 140 FI. How do I reset EC1
  15. no NV response on OS46FA
  16. Gemini Question
  17. 91FX rpm
  18. 120 SURPASS DOWN ON POWER?
  19. 91 fx break in
  20. FX 61
  21. older 61 fourstroke
  22. OS .91 SX-H
  23. BGX-1 3500 wont run vertical help
  24. OS 70 Ultimate
  25. 61 FX idle adjustment keeps changing
  26. FT-300
  27. OS .40 Surpass 4-stroke problem
  28. OS 91 Surpass II Max RPM and Tach Setting?
  29. O.S. .91 Surpass I carb settings and beginners questions.
  30. .46 ax sllimline muffler
  31. OS Max .10 orientation
  32. OS 91 Surpass Idle Problem
  33. thread size on .52 4s
  34. OS7D Carb Setting
  35. OS .91 FSR
  36. OS120 SIII RPM
  37. Practical rpm vs Rated Power
  38. OS 91 FX exhaust pipe
  39. Tuned pipe for 50 SX
  40. New 91 4-stroke crankcase vent strategy?
  41. OS 15 CL conversion?
  42. Break in FS-91 SII
  43. FX91 mixture problem
  44. Prop for 0s50 sx
  45. what causes this
  46. OS FS-91 Idle settings problem
  47. OS #743 muffler
  48. Need some help Bax!!!
  49. Breaking in a .61 FX
  50. OS 61 RFP ABC
  51. os .26 and .40 4 stroke car engines q's
  52. OS 46 C/L venturi diameter
  53. os fs90 fourstroke
  54. OS 91 FS engine quits
  55. OS 61FX Air Filter?
  56. OS 70 Ultimate
  57. OS BGX
  58. os 1.08 breakin
  59. Needle valve location OS 160
  60. O.S 1.60
  61. 30% CoolPower us in 4-strokes
  62. Electronic copy of instructions for O.S. 60 four-stroke engine
  63. OS FS 120 WITH INCLINED ROCKERS INSTRUCTIONS
  64. OS 32H Question
  65. OS 91 Surpass Exhaust header breaks
  66. Is there a .25 AX on the way?
  67. OS 46FX muffler screw
  68. OS 1.60 bearings
  69. Help, was this my fault or OS's?
  70. Muffler back pressure
  71. propeller for OS 30
  72. 90FS Ring Gap
  73. 15 CVA cover plate
  74. LA65 Header pipe
  75. OS .32 Fabc
  76. 61RF-P ABC prop questions
  77. OS FT 300
  78. Cowled OS 91 FX
  79. Problem with OS 26 FS
  80. FS-91 Surpass II - Black residue on the inside-top of fuel tank after running in
  81. OS 61 MAX SF Pumped
  82. OS 90 needle valve and o ring
  83. tank pressure
  84. fuel?
  85. Rumors of an .18
  86. Varnish or Rust?
  87. 61FX pitts muffler
  88. OS 1.08
  89. vz-rz interchange?
  90. MOVED: Need an O.S. FS61 Marine engine
  91. OS .21VZ-B Premature Wear Problems - Please Advise
  92. OS .60 FP RN
  93. Beginner: Cannot Start O.S. .46 LA
  94. OS300 4stroke twin
  95. O.S. Max FP 40
  96. Proper Break-In for an O.S. 25 fx
  97. Prop for OS 300 4stroke twin
  98. OS 50SHX-H
  99. Installing valves in cylinder head
  100. Rumor on the .46 FX
  101. OS FX 91 problems
  102. Hard to tune
  103. owners and parts manual, o s 61 sf
  104. 91 FX knocking
  105. .91 4-stroke exhaust pipe size
  106. OS FS 48 Surpass
  107. O.S. Carburetor #6B .61 SFN-H
  108. OS 61 FSR Carb question/replacement
  109. Bearings
  110. O.S. 46 FS
  111. OS FS-91 Removing the bearings
  112. Question about the Hanno Specials
  113. OS 120 FS SURPASS W/PUMP PLUMBING?
  114. Replacement Piston Ring
  115. OS 120 FSIII w/pump
  116. OS 300 4 stroke twin
  117. OS 160 FX Crank Case Tap?
  118. 140RX throttle linearity
  119. Great Service
  120. Tuning 120 fs surpass
  121. 3 View Outline ??
  122. Timing on O.S. .91SF Surpass
  123. .15FP CL vs RC question
  124. OS 108, Remote needle?
  125. OS .46 LA
  126. OS 108
  127. the 46ax
  128. OS 1.60FX Fuel choices
  129. OS FP/LA interchangability
  130. having problems with OS 91FX
  131. Help for parts for a 90 FSR?
  132. OS 61 SF Burning Plugs
  133. Os 140 rx
  134. OS 140RX
  135. OS 60 FR Muffler??
  136. Bax - Hobby Services inability to repair older OS engines??
  137. OS 160 Cant Get It Rich
  138. OS parts
  139. Parts for discontinued engine
  140. 91FX and a Bisson Pitts Muffler
  141. OS 48FS choke valve interchangability
  142. Hanno Special Header Length
  143. OS Max H
  144. OS 1.60 FX SPINNER ADAPTOR ?????
  145. Is my 46fx liner peeling?
  146. OS-32SX-H question
  147. Hanno Special Plug?
  148. 50 sx-h ring
  149. FX91-What fuel tubing size?
  150. o.s. 50 sx air bubbles
  151. having problems with tuning of O.S .61FX
  152. Setting up an O.S. 160FX
  153. Screw Size 46 LA
  154. i need to know what do i need to turn my os .12 cv into a pull start
  155. 2 questions about my os 40 la
  156. OSMax 12 CZ-Z problem
  157. Temperature of engines?
  158. OS 40Max-H My first engine teardown-help!
  159. OS 46LA...only as powerful as a 40?
  160. OS .46 FX Issue
  161. .91 FSR Parts Sources...
  162. OS 91 FS II pump
  163. OS91 - Dry rear bearing
  164. Problems with MAX 61FX
  165. OS FX .46 Getting Tired?
  166. OS 90FS FOUR STROKE ENGINE IDLE SETTING
  167. Info on FS120S II
  168. parts exchangeability
  169. HELP!! MY OS 50SX ISN'T RUNNING PROPERLY!
  170. Storage of OS 120FS with pump
  171. OS 46 FX Problem
  172. .61SF-P pump nipple broken
  173. OS #743 muffler replacement that fits?
  174. pre detonating OS 1.6
  175. OS 50 w/ 60 Carburetor
  176. OS 61RF-P
  177. OS 40 LA Airbleed setting
  178. OS Rotary engine
  179. O.S. 50 SX air bubbles
  180. os 48 compression loss
  181. OS 120 FS Question
  182. Question about service turn around time
  183. FS 70 Ultimate Availability
  184. OS 91 getting richer on idle
  185. OS 160 Fuel ?
  186. OS LA40 Carb Repair
  187. O.S. .91 FX
  188. OS FS-52 Throbbing
  189. 91 FX idle
  190. OS 70 S II Question
  191. Rusted stuff
  192. os 70 heli engine piston explodes
  193. OS 40 LA Power
  194. OS 91 Surpass question
  195. 52 4/C won't draw fuel
  196. LA 0.40 RPM's running away from me.
  197. OS MAX RZ compression
  198. OLD vs NEW OS 46 FX
  199. OS 140RX Rich in Midrange
  200. OS 1.60 Prop
  201. OS 25 MAX FP
  202. FS-120 (non-surpass) Performance Specifications
  203. FS 48 Surpass
  204. New or Old OS - How do you tell?
  205. ring job
  206. Four stroke mufflers
  207. .46FX to .50SX Upgrade ... help please ...
  208. OS FT-300 FOR MY PITTS SPECIAL
  209. Newly Broken In OS 46 FX
  210. Remote needle valves in os .50 SX and .91 FX
  211. OS 61 FS Muffler?
  212. Can I Make My .61FX a .91?
  213. 40 SR parts
  214. bubbles!! ehhh!
  215. O.S. .61 SX-H Heli Engine- HEIM Mechanics Setup
  216. Tried everything, 46 NV still leaks?
  217. os 46fx..need serious help
  218. OS 40 No compression
  219. OS Max SR-40 Marine - what muffler?
  220. Main bearing broke
  221. Manual for a Max .61 SF?
  222. Tri prop for OS FS70
  223. How to send an item to service
  224. About this Forum
  225. fx 61 loosing power
  226. engine help
  227. OS 91 Surpass-version I
  228. O.S. 25FX and O.S. 25SF
  229. New 91FX muffler missing baffle
  230. OS 91 FX very slow to idle down
  231. os Wankel 1800
  232. OS 91 FX
  233. O.S. 1.08 FSR
  234. I lost a muffler bolt on my 46 fx
  235. Corrosion on piston/cylinder and crank
  236. Port timing 91FX Vs 91SxH
  237. 25 la....
  238. FS-120 surpass fuel setup
  239. 0.s.15 cv-rx refusing to keep running
  240. OS 46 SF
  241. FS-70 header pipe broke on run-in
  242. Pressure Tap OS 91FX
  243. OS60 MAX-H
  244. Bax - OS .10 FSR Con Rod Substitute??
  245. FS90 head stripped
  246. Looking for OS FS-26 Info ...
  247. 46FX - engine rpm up and down at full throttle
  248. Prop Choice
  249. OS 120 w/pump instruction manual needed
  250. OS 120 Surpass I power loss

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