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  1. OS Needle Valve question
  2. pegasus Questions
  3. carb vs tank level with pressure
  4. O.S. Engine "Gaskets"
  5. OS Max 25 sf engine
  6. Os gf40 4 stroke basic question
  7. OS .40 LA Operation
  8. FT-300 Super Gemini Connecting Rods
  9. os 55ax installation problems
  10. OS Fr7-420 questions
  11. OS support
  12. Os .110
  13. os 55ax
  14. 91hz with #61b carb
  15. Os 15gt
  16. OS. 21 tm
  17. O.S. 1.08 FSR carburetor overhaul
  18. 25 FX Discontinued 2017
  19. OS 70 SZH question
  20. O.S. 120 II gemini exhaust extentions
  21. OS BGX 2.2 Head Gasket question, and Head and Back Plate torque specs please
  22. O.S. .61sf
  23. run a four strock using crankcase pressure or no pressure
  24. Different 1.20??
  25. 61 FX Bearing Replacement
  26. O.s. 10 / 15
  27. why does my Idle Needle need to be set so Lean ??
  28. trouble with replacing low speed needle
  29. OS CZ-2 Rebuild
  30. O.S. .46 SF Max Restorations; HELP!
  31. looking for a parts soource, OS .91 surpass II
  32. O.S. 120 FS Surpass (1) ?, Pump....... converting from pump to non pump....
  33. OS 46 FXi piston/connecting rod oreintation
  34. Engine quites after 30 seconds of idle
  35. O S FS 120 engine parts
  36. OS 91 Surpass II quits when igniter is removed
  37. OS FS 91II P (with pump)
  38. Oil content
  39. OS 15LA Engine Made In China?
  40. GT60 Backwards Start
  41. OS made in China?
  42. Recommended props for engine
  43. Os bx 1
  44. Help needed !!
  45. OS 120 Surpass Pump Timing?
  46. OS 1.60fx Piston Question
  47. OS FS91 and FS120 exhaust question
  48. os carbs
  49. O.S. .91fsr low RPMs
  50. engine compression
  51. os surpass fs 120
  52. 95 rv piston removel
  53. 46LA Carburetor Fuel Inlet Nozzle
  54. OS 91 FX Head on a OS 91 SZ-H Engine
  55. OS 120 Surpass Pump
  56. OS .52 FS Unusual Problem
  57. ball on hex screwdriver twisted off in socket head
  58. Torque curve for OS 1.08 FSR or OS .90 FSR ?
  59. OS .90 fs
  60. Os 46vd-p
  61. OS Sirius FR5 300 5 Cylinder lost compression!
  62. OS 91 FX Piston
  63. OS 55 ax problems
  64. OS GF30 adapter nut for Tru-Turn spinner
  65. OS 91 FX problems - need help
  66. OS 91 surpass making a strange popping sound.
  67. OS 91 SII (non-pumped) Idle Mixture Adjustment
  68. Any issues mounting an OS 110a inverted
  69. Os 61 sf abc
  70. 48 Surpass with APC 12x6
  71. 18x8 propeller for GGT15?
  72. O.S. 1.20 AX rebuild
  73. 95AX - Exhaust port on Engine is longer than the Extension?
  74. Scott J.
  75. O.S. Four Stroke Alpha engine discontinued
  76. A Dilemma about Propeller and RPM.
  77. OS 120III Pumped Cam/Cam follower alignment
  78. O.S. Walbro GT15 HZ carburetor part
  79. OS FS-120 Surpass II Rebuild Question
  80. OS FS-70S II parts question
  81. OS 91 FSII Pumped leaks from regulator
  82. OS FS26 valve cover
  83. OS 91 RZ compression
  84. Fuel for break-in of OS Four Stroke engines
  85. OS FL 70 Piston Removal
  86. GF30 Carb leaks around the rotor at the body is this normal?
  87. Origin of OS engines?
  88. OS 90FS and OS91 Surpass in a twin
  89. Upgrade FS-26 to FS-30?
  90. os 52fs coverplate
  91. os fs 200 regulator
  92. New OS GGT15
  93. OS FS-48 bearing questions
  94. Mufflers for older four-cycles
  95. OS 46AX Muffler question
  96. Cam timing on old 91 surpass
  97. 1988 O.S. .21 MAX EXR and O.S. .21 MAX RF Factory Needle Settings HELP?
  98. OS 61sf with a OS fueler system, carb and muffler
  99. Pegasus 240 Questions
  100. Noise?
  101. OS 91 FX at about mid throttle
  102. OS GT15 starting issue
  103. OS carburators
  104. O.S. FS-120SIII - Regulator System Reassembling - Howto
  105. Os rf/ sf
  106. Os 60fp (rn)
  107. on board glow
  108. Would camshaft timing one tooth out cause a F/S engine to run hot?
  109. OS 105HZ-R Engine
  110. 91 Four Stroke Surpass
  111. O.S. Max 77 VR DF
  112. O&S .61 four stroke sleeve removal
  113. OS .91-P Tricky Tune
  114. OS six cylinder Pegasus ??
  115. OS 55AX Piston removal
  116. OS 1.20 Supercharged Parts
  117. Bearing shields
  118. OS FT 300 twin
  119. OS120 FS Destroyed... PLEASE
  120. converting 91 FS II pumped to non pumped carb
  121. GF-30 engine mount
  122. OS 61 SF - Need Drive Washer
  123. poor running fs-30s
  124. OS 110 pumped cracked case
  125. How Low of Idle should a typical 61 FX Engine get?
  126. Can't remove muffler screws OS 32 SX
  127. Idle Screw will not stay set on a 60C Carb.
  128. O.S. FS .61 carb
  129. OS .46 FX Carb Replacement
  130. O.S. FS Series 91 Surpass Weird problem.
  131. Did os ever come with Perry carbs?
  132. T-6010 Tuned Silencer for OS 1.40 - using it on a 1.60
  133. OS 91 Surpass woodruff key
  134. OS Gemini 120 FT
  135. OS Parts for a Tower engine?
  136. GT33 big end bearing replacing
  137. Os 160 twin fuel set up
  138. OS55HZ Hyper Break In
  139. Is max 15cv-x
  140. Gf-30
  141. FT 120 GEMINI 1 glow engine twin cylinder
  142. OS 91 VR-DF square and roud head difference
  143. 95 AX, "mr. deadstick"
  144. O.S. 2B carb
  145. OS 91FX Piston orientation.
  146. OS FS 200 S, Oil in the crankcase
  147. OS 4-stroke Valve Sizes
  148. Os 91 fs
  149. OS FS-90 rear rocker
  150. Os 120 Surpass pumped stuck lifter
  151. OS Mufflers
  152. FT-160 rod removal help, please
  153. Help, I need exhast headder for OS .91FS
  154. OS 91S II Needle Valve
  155. 0% Nitro fuel on AX engines
  156. OS 160 Twin Prop extension
  157. OS FS@-56 fuel leaks at exhaust header pipe
  158. muffler presure heat
  159. Need Carburetor nozzle assembly for OS Max 40 fp
  160. Pressure Fitting O.S. 744 Muffler
  161. Bax, OS 70 FS Carb Question
  162. OS FS-120 Surpass Pumped (late '80s?) Trouble Running
  163. engine power loss
  164. OS 1.20 FS Poor Performance
  165. OS carb part...
  166. Why Do Model Engines Run Backwards Sometimes?
  167. Throttle Lever Assembly 1.08
  168. OS 1.40rx Temperature
  169. O.S. .25 AX
  170. O.S. 120 Surpass Failing after hot.
  171. FT-240 Cam/Crankshaft Timing
  172. MOVED: OS VALVE SPRING WORK IN MAGNUM MOTOR???
  173. MOVED: Marvel Mystery Oil?
  174. OS MAX 21 XZB
  175. os-20fp
  176. help with OS FX 1.60
  177. OS.65 LA fuel leak-help?
  178. OS SX-H Hyper Blowing glow plugs
  179. I can't find a con rod for my CZ.
  180. OS .25 AX
  181. Upgrade for a OS Max 60FP
  182. OS 91 surpass cam bearing removal
  183. Kano Sili Kroil with Silicone
  184. OS 50SX-H Non Hyper
  185. OS SX-H Hyper
  186. 1.08 FSR
  187. OS 10 Question
  188. O.S 18 tz pilot nut??
  189. O.S. 1.08 prop
  190. OS 48 4s question....
  191. OS 7D Carb.
  192. OS GT33 shaft dia 8mm vs 10mm prop hole
  193. OSFxi 46
  194. Parts needed for non surpass OS120fs HELP
  195. OS 120 Surpass Ver. 1 valve clearance
  196. I need help with my OS GT 33 installing it into 27% EDGE 540
  197. tuning v series OS 92 4 stroke
  198. OS Max FS 62V Four Stroke
  199. Old OS61 SE pattern engine
  200. os 55 ax
  201. Delete
  202. MOVED: OS 61FX Piston/Sleeve
  203. "New" OS 55AX ???
  204. Four stroke glow plug
  205. "O" rings for the pushrod tubes?
  206. fr5-300 oil vs fr7-420
  207. MOVED: OS .60 SR muffler
  208. OS FX 91 carb swap
  209. OS 65AX Cover Plate Gasket ???????
  210. OS Rear Bearings Wanted
  211. GT60
  212. O.S. 21VG(P) roto-start question???
  213. After Run Oil and LA Engines
  214. Mid 90's OS FS120 Surpass Break In
  215. FT-240 / FT-300 Connecting Rod
  216. OS52FS Idle Adjust
  217. Oil content in gas and glow??
  218. OS 1.08
  219. OS 155 P
  220. MOVED: OS GT 33 GAS ENGINE
  221. OS TWIN FT 120 GEMINI CAM TIMING
  222. OS TWIN FT 120 GEMINI CAM SETTINGS
  223. OS 95 Help
  224. OS 75AX rebuild- question for Bax
  225. 55AX mid throttle issues, fixed I think
  226. After Run Oil into a 4 Stroke
  227. O.S. Gemini 120 twin
  228. OS 95V FS Prop Choice
  229. Engine Mount dimensions needed for OS FS 155-a
  230. Problems with O.S. 91 Surpass II w/pump
  231. 55 ax: Bubbles? Help Diagnose, Please!
  232. OS Surpass 91
  233. Stripped back plate threads
  234. 120 Surpass won't Start after rebuild
  235. FS-120 Connecting Rod
  236. After-Run Oil Chemical Question
  237. 55 ax enough power?
  238. front seal drips
  239. O.S. .25 SF (circa '92) Manual or Part # Needed
  240. inverted four stroke
  241. Bad O-Rings on two 61FX Engines.
  242. 1.20 AX
  243. os 46AX II Carburetor
  244. Engine Information
  245. OS FS-60 Carb
  246. Inverted OS 91 4 Stroke Surging
  247. OS 46AX Shaft Play
  248. OS .91FS Surpass I back plate
  249. OS70s throttle arm ring disconnect
  250. os46AX high speed needle