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  1. Sending for O.S. Max Service
  2. OS Max 60 sr NEED PISTON RING
  3. O.S. Long Stroke
  5. OS LA Series Problems?
  6. I need power band graphs for OS motors
  7. OS 91 Surpass not surpass II
  8. older os 90 with the glowplug in the front -- need both needle settings
  9. OS 46 FX like to start backward
  10. Prop size for Wankel?
  11. Old Os 120 non surpass with separate valve covers
  12. Please Close - found answer
  13. OS FS-120 III Surpass in Mile-High Denver
  14. CoolPower Green for OS .46 FX?.
  15. OS 32SX-H adjustment question
  16. Help with .61FX, changing needle valve position?
  17. OS 70 4 Stroke
  18. Os 46 Fxh
  19. .32
  20. OS 120 Surpass pump Mk1 or How to Save the pump
  21. OS 70 sv-h Breakin
  22. 4 stroke 70 OS
  23. 12CZ engine help
  24. OS 46fx runs great upright, but not inverted.
  25. OS 61 VF-H GS A-2 reduction Gear Unit
  26. Bearing Ball Missing
  27. OS-.50sx Best prop for speed+thrust??
  28. OS91FSII tap question
  29. Are there any downsides....
  30. Muffler Weight
  31. Fs140-fi
  32. need the distructions
  33. Difference between the OS 70 and 70II
  34. OS 70 II Surpass
  35. O.S 32 fh instructions needed
  36. OS .32SXH Bearing Removal
  37. O
  38. 140 RX EFI sagging
  39. Need Piston Help On Os.15cvx
  40. O.S. 1.20 Surpass II...
  41. OS .70 SZ-H Heli Availability
  42. prop size OS 91 surpass
  43. Mufflers For FT-160?
  44. O.S. .15CV settings ECT.
  45. Broken piston on O.S. .46FX
  46. Royally messed up .46FX!!!
  47. OS 91 FX needle settings
  48. 70FS Split Cotter Removal
  49. OS FS91 fuel flow problem
  50. OS .70 4 stroke problem
  51. OS Gemini 120 prop sizes
  52. Fixing up an old os .35fp need some help
  53. OS and KHB sleeve and Piston
  54. .46 Fx Compresssion
  55. 1.60 FX Bearings
  56. what is a stroke ?
  57. Engine running temperatures
  58. .50sx and 30% nitro
  59. OS 30 Max - S?
  60. Heavy hub on new 4 stk OS 91
  61. FS52s lot of oil
  62. Os 91 / Tuned Pipe Installation
  63. os fs 91 problem
  64. o.s. 120 surpass
  65. Compression ratio of OS .46FX and 1.60FX ?
  66. What RPM range in idel for a 0.46FX ?.
  67. os 70 shuts off
  68. OS46 Engine Quits?
  69. OS 91FS stops abrubtly recently
  70. OS 12tr Heat Sink
  71. Thanks O.S.
  72. 4 stoke engine maintenance
  73. Fan Installation os 50 sxh
  74. OS FS .40C Temps
  75. O.S. FS surpass II conversion from pump to non-pump
  76. Surpass II wont't run
  77. 91FX dimensions needed (not in manual)
  78. OS 140 with 60 pipe
  79. OS 120 Surpass II pumped won't run at full throttle.
  80. 61 ABC problems
  81. carburetor OS#60K
  82. OS 40 SF ABC throttle transition
  83. BGX 3500 Help!!!!!!
  84. HEATED owner of an OVERHEATED 91FX
  85. .46Fx
  86. 40 VF
  87. 0S .46SF - I want more power
  88. 91 SX-H timing info needed
  89. OS max 91 four stroke...no power or compression
  90. OS 1.40 prop
  91. .61 FX wont Idle, please help
  92. Gasket
  93. Setting high speed needle valve!
  94. Probs with .40fx
  95. 60J Carb
  96. os 120 surpass II w/pump
  97. OS50 XXrich@1/4 stick
  98. Os .15 Fp
  99. When to rebiuld?
  100. OS .10 Head and Back Plate Screw Sizes
  101. Need a new crank for and O.S.
  102. Removing Bearings and Crankshaft from 40 SF ABC
  103. os 91fs
  104. Os 15
  105. OS Max FP .40 Manual
  106. Os 50 Sxh
  107. Looking for manual
  108. OS 120 Carb
  109. Need OS part number...
  110. OS-30 weight spec is wrong!
  111. O.S. Surpass 30
  112. OS91 C-Spec
  113. 140RX spitting bearing!!!
  114. OS Engine Specs???
  115. fs 60 open rocker
  116. Engine Purchase Questions
  117. O.S. Buggy Engine, Can I convert to Pull start?
  118. Should I replace the case on a os 61?
  119. OS FSR/SF Parts Interchange
  120. OS 140 Rx storage
  121. OS 70 leaking???
  122. .15 Fp
  123. OS 52 4 cyl.
  124. os40la
  125. O.s. 61 Sf Prop Nut Size
  126. Os 91 Fs
  127. Os21 Vz-r
  128. os FX silinder pilling ,is this still hapening Cause i have one that did it with only
  129. OS Max 1.2 FS Surpass II pumped
  130. 120 4cycle w/pump
  131. os40fx vs os fs52s
  132. OS 120 Surpass III w/ pump wont advance from idle
  133. .15cvx
  134. O.S. .28f w/2h carb. Why is the head......
  135. old os 120fs
  136. Amcross, somebody... questions about .46 FX break in ...
  137. Marine engine OS 91 VRM, who knows about existance ?
  138. os40LA quits
  139. OS 120 surpass w/ pump
  140. O.S. 61 SF with pump
  141. Flexible Exhaust Pipe with OS 120 surpass III?
  142. Part for OS FS-90 (non-surpass)
  143. OS RZV01B(p)
  144. 160 FX adjusting woes
  145. Pressure Regular on OS120 III with pump
  146. Initial L & H End Carb Settings for .46 SF ABC
  147. OS 10 LA Leaking fuel
  148. FS-70SII Loss of power
  149. O.s. Fs70s Plastic Part
  150. OS .46 V Rear Exhaust
  151. os 46fx back cover assembly??
  152. Os 140rx
  153. O.S. 61RF-P with os header & os tunepipe
  154. Collets and Flywheels for FS40-C
  155. Os .91 Fx
  156. OS 50 Surpass clikcs when turned over
  157. 61 FSR Circa 1975 OILS?
  158. What is the replacement engine for the Max 25 FP?
  159. OS 91 FX in UK
  160. .91 2 Stroke
  161. Back Plate Mounts
  162. head bolts
  163. Which is it?
  164. Identifying OS Max 61 SX-H Subtype
  165. glow plug for 46 fx
  166. OS engine part needed
  167. Factory carb settings on 46fx?
  168. OS Max 40 sr NEED PISTON RING
  169. Os 10 La
  170. Engine Dissassebly Guide
  171. OS FT 160 Carb
  172. Will the crank from my .12 CV work in my new .15 CV-X ??
  173. Old model fx 120 surpass W/ #12 pump
  174. Online source for OS Engine Parts?
  175. OS 46 FX Carb Won't Close Completely
  176. OS50 SX-H 5B carb
  177. Pump priming?
  178. Mid throttle loads up OS160fx
  179. os .28
  180. OS 61 FX needle valve/fuel inlet positioning
  181. Back (cover) plate of 160Fx
  182. Crankshaft Extension for the OS 52 four stroke
  183. .61 FX peeling cylinder
  184. OS Max-H 60 (Max H60) parts needed
  185. OS 46FX Liner problems
  186. FF-240 In need of Manual?
  187. OS FS 120S SP Supercharged
  188. Looking for info on this .20
  189. FS-120 III w/pump silencer
  190. Questions for OS 120 Surpass III
  191. FS 120 pump output
  192. old os 15 max idle prob.
  193. OS 46 FX torque Curve
  194. O.S. 61 max sf
  195. Quick ? on four strokes
  196. OS 120 Thrust
  197. Set Screws in the High Speed Needle
  198. Is it worth fixing an old OS20??
  199. Frustration with 91FX
  200. Need Tuning Help OS MAX CV-X .15
  201. OS 25LA cylinder
  202. what series os 120 surpass
  203. older os120 surpass w/pump
  204. Os 1.40rx ?
  205. 46FX and 32SX break-in : Manuals says 4 cycle them / AmCross says that's a mistake???
  206. OS FT120 exhaust pipes
  207. OS .52 4 stroke
  208. Pump for OS 1.60FX?
  209. Os La 46 Muffler Extention...help!!!!
  210. Os .10 Fp
  211. Metric threads
  212. dual plug head for 1.40 RX
  213. OS .91 FS valve spring collapsed
  214. How to tell if V engine is really DF +
  215. Old OS questions
  216. OS 46 FX Mounting orientation and exaust question
  217. will it fit
  218. FS91 II w/pump question.
  219. O.S. really needs to make a .75 2 Stroke
  220. engine questions?
  221. Os 48 Surpass
  222. Tank pressure with OS160FT
  223. Help with identification of old OS .25 engine
  224. bearings for OS 25FSR + 25F
  225. 13x8 Master Air Screw 3-blade prop for FS91 II
  226. Looking for OS 40SF ABC Specs
  227. OS .46 Idle Mixture
  228. O.s. 65 La
  229. Adapter for flex exhaust
  230. Os .91fx Abc???
  231. Questions 140rx
  232. OS FS 120 Non Surpass
  233. Relocating the crankcase breather on my OLD FS-40...
  234. OS SF 61 carb
  235. Os 10 Fp
  236. OS FT-160 twin
  237. os 160 tuned pipe
  238. OS 50SX-H Ring
  239. OS 1.40RX help
  240. OS .46FX not running well. Outside temp the problem?
  241. Does Slimline make Pitts Muffler W/Smoke for OS 160
  242. Os Max 40 Sr
  243. OS 90 / 91 FS bearing replacement proc.
  244. ? about OS 40LA
  245. OS91 4/c backfiring on each flip to start
  246. os 91 'c' spec heli engine
  247. os .35 help needed
  248. Service question
  249. Os 160
  250. Need Piston Ring for OS 160FX