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