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  1. engine mount specs
  2. OS 18 TZ
  3. OS 2.00 Lackluster performance
  4. Obsolete OS Engine Information
  5. OS 61VF ABC GS A-1
  6. OS .61 4 stroke
  7. 18TZ Can't go past 1/2 throttle
  8. OS FS-70S needles bottoming out
  9. .91 FX Leaks Fuel at Drive Hub
  10. FS61 Silencer
  11. OS-46SF "Reversed"?
  12. OS IL-300 4 Cylinder - Fuel Setup
  13. OS .46AX running too rich
  14. Max distance between OS91FX and tank
  15. OS 55AX engine & plug life?
  16. FS-26 AND FS-30
  17. Stock 91FX muffler Q
  18. Break in?
  19. OS200-P getting 6500rpm ONLY....
  20. Os 55 Ax dying
  21. OS 3500 BGX-1 problem
  22. 91 Surpass metallic engine knock at half throttle?
  23. v-spec issues
  24. PD-04 Diaphragm Fuel Pump
  25. FS 40 Stuck valves
  26. OS 1.20 4-Stroke Questions
  27. .55ax noise
  28. OS MAx .10 ?
  29. OS FS 91 w/pump peak RPM
  30. os91fx and os61fx
  31. OS 25 FX
  32. will there be any new OS engine soon?
  33. os .18
  34. Figured it out..... Not worth reading
  35. OS FT-160 leaking fuel
  36. MOVED: Cline vs. Perry vs. Iron Bay
  37. 91 FX backplate ?
  38. Best replacement for OS .46 AX
  39. 30vg warranty
  40. OS 120 AX, No response to needle valve adjustments
  41. os 91 fx rebuild
  42. Spin start adapter for OS .21 V-spec
  43. MOVED: Good .12 engine
  44. exhaust on 55ax
  45. Letters code below mounting lugs
  46. OS 91 RUNNING GOOFY
  47. what is a os cz hirobo
  48. Ideal .55ax rpm range
  49. O.S. CV-R bump start conversion
  50. delete
  51. 1.60 prop sizes
  52. OS .52 & .56 exhaust thread pitch.
  53. os 120ax + remote tank = :(
  54. os 120ax
  55. exaust 4 stroke
  56. O.S. 61 F/S Touchy high speed needle
  57. Old but new OS 91 surpass with choke valve
  58. The Amazing 120AX
  59. Need upgrade carb on OS-FL70
  60. Os FS30 muffler and needle valve extensions
  61. 91 surpass prop size
  62. torque specs
  63. FS-200s and FS-200u; what's the difference?
  64. OS Surpass ii idle problem
  65. MOVED: O.S. FS 120
  66. MOVED: OS 200 for Pattern?
  67. OS FS-48 Replacement Head
  68. *OS 120AX & Nitro Content*
  69. Inverted OS FL 70 won't lean out.
  70. O.S. FS-120 III Surpass 4-Stroke with pump "NEED HELP"
  71. os max 140 rx
  72. need some help with my 18tm
  73. O.S.120 Carby does any body Know
  74. OS H60FGR Blackhead
  75. Afterrun oil? O.S. FS-91 w/pump
  76. O.S. FS-91 w/pump, peak RPM?
  77. oil content / FS-91 II w/pump
  78. os 56 fsa
  79. 40 LA Fuel Inlet Fitting Came Loose
  80. Possible largest prop for OS .46 AX
  81. *OS 120AX Bearings*
  82. os 46 ax running a 20000 rpm
  83. rywill these engines fit??
  84. os rz max
  85. Hyper 50 damage
  86. .91 FS II Surpass leaking and losing power
  87. 52 Surpass Tappet Gap
  88. OS21TM air leak?
  89. O.S. 46FS piston ring
  90. os 91fs no compression
  91. 1.20ax prop question
  92. FS-70 Ultimate fix
  93. MOVED: O.S. 61 RF - Tune pipe - Hanno II Sleeve ABN/ABC
  94. OS FL70 four stroke
  95. O.S 1.20FS Question?
  96. OS Max 25 Sticky
  97. OS 1.20 FS runs erratic
  98. OS .61 FX
  99. 55AX sensitive needle
  100. FS120 Surpass II pumped low speed needle setting
  101. FS-120 Surpass III Engine w/Pump What fuel?
  102. Where can I send the engine back in the UK?
  103. v spec carb
  104. few questions on the .21 V-Spec
  105. OS 1.20 pump regulator
  106. AX .55 Low Speed factory setting
  107. varnish on 6 month old engine
  108. One way bearing slipping
  109. SF .46P setup
  110. OS FS91 II ticking
  111. 18CV-RX in Tmaxx
  112. OS 32SX air leak problem
  113. 91FX break-in with Bisson muffler
  114. Question on OS 75 AX
  115. Head Shim for 21TM w/30% Nitro
  116. OS61SX-WC, changed fuel to lower nitro
  117. .18tz hard to start
  118. OS FS-91 / w Pump, should I avoid castor oil?
  119. 55 AX perry pump ??
  120. OS61Fsr
  121. OS FS-91 / pump; runs when needle valve fully closed?
  122. What is the part number for the most updated needle valve for a 91FX
  123. Idea to Secure Muffler on OS FS91 II - Is it OK?
  124. os 160 FX woodruf key
  125. 91 FX Leans Out?
  126. Exhaust connection threads
  127. 18tz w/ 18tm parts
  128. .18 cvr-x Stalling
  129. OS FT-160 Gemini Tank question
  130. 18tm
  131. O.S. 1.60 Back Plates
  132. OS Max .91 Surpass 4-Stroke engine - Pipe & Muffler Question:
  133. .91 Surpass crankcase tap
  134. Question about O.S. 46 AX carb
  135. OS FS-200S Pump
  136. WHICH PROPELLER FOR OS 91 DF?
  137. OS-120AX quits
  138. Should I send my .55ax in?
  139. O.S. 21VZ-B V-Spec Buggy/21J
  140. How to take cooling head off .21tm?
  141. New OS 81 4-stroke
  142. OS 52 Four Stoke Break-In
  143. Good plugs for the .21TM?
  144. OS 70 Ultimate carb question / solution
  145. OS 20 FP
  146. Gasket Set cross reference?
  147. o.s. .18tm carb?
  148. 15CVR-X and 18CVR-X Starting shaft interchangable?
  149. OS18TM question
  150. Missing Screw Size?
  151. FT 160 Gemini
  152. MOVED: Magnum XLS 52
  153. 91 Surpass II pump problems (HELP)
  154. New O.S. 81 4 stroke [ abit warm ]
  155. 3D prop for .46 AX??
  156. OS FT-160 valve adjustment
  157. 46AX - Fine grit in filter after break in
  158. O.S. 91 C-Spec conversion to acft.
  159. OS 120 surpass III w/pump
  160. OS18TM problem
  161. 55ax muffler
  162. OS 91 FX Muffler
  163. Hyper 50 Blown Piston again!!
  164. os 18tz head
  165. 46AX Liner issues
  166. 120 AX Break-in Prop
  167. 1989 OS MAX 46 SF-S abc STARTING PROBLEM
  168. rpm surging 4stroke 52 surrpass
  169. OS18 TZ Pbs
  170. 120 ax max recommended rpm
  171. 50SX-H Hyper rich low end
  172. os 70 surpass, stopping
  173. FL70 muffler pressure to the sump
  174. FL-70 loss of power
  175. OS 52 4 stroke will not idle
  176. OS FS-52 4stroke in hot weather.
  177. vspec problem
  178. OS 200 FS settings ??
  179. In need of a 70 Surpass II crankcase - Discontinued?
  180. OS 61 FX dead sticking
  181. OS FS61 head screws
  182. AX55's
  183. O.S 55AX vs. 61FX?
  184. O.S. 61 Question?
  185. where are os .21 vzb manuals online?
  186. Will gasoline damage O rings?
  187. Which engine is that???
  188. Fitting Prop to an OS FT 240 (300)
  189. OS .32 sx cylinder head???
  190. 55 AX Mid Range
  191. OS FS61 cam bearing removal
  192. OS 21 VG stall after half tank
  193. replacement piston ring for OS MAX 50 SX
  194. OS 91FX Problem
  195. FS-1.20S III
  196. OS 18 cvr won't say running?
  197. OS18TZ-TX crankshaft into 18TM
  198. Bearing replacement OS 1.20FS Surpass
  199. 91 surpass vs 91 surpass pumped
  200. 91 surpass factory mixture setting
  201. O.S. .18 cv-rx
  202. OS 91FX Break-In help
  203. 4 cycle assembly question
  204. FR5-300 Sirius radial being discontinued?
  205. A3 plugs vs the RCAT glow starter
  206. Motor mount for OS 200U
  207. OS Carb
  208. idling screw
  209. Which fuel for both O.S. FX25 & O.S. FS56a
  210. Honing a 46 FX
  211. OS70 backfiring
  212. Minor pitting on piston.
  213. OS 61FX lowspeed Needle valve location?
  214. OS46AX engine
  215. fs91/p adjust...
  216. .46 LA fuel and prop recomandations
  217. fs-91/p breakin problem
  218. Best prop for OS 1.20 AX
  219. O.S. 15 LA Won't Start
  220. FS56a RPM
  221. YS/Saito 20/20 in OS 46FX
  222. parts for 2nd gen. 1.20w/pump
  223. new 37SZ-H Problem
  224. o.s 21 tm tmaxx minifold
  225. Vspec VZB .21 (possible connecting rod dmg?)
  226. OS 61 RF Thrust washer
  227. os .21tm factory settings
  228. 91fx max rpm
  229. Hyper 50 problem??
  230. Rust: pre-existing ??
  231. Trouble With New OS .46AX
  232. OS 91FX can't shut down
  233. OS .61 FSR carburetor
  234. O.S. .50SX Bearings
  235. 18CV-R and 15CV-R
  236. O.S. 4BK Carb Replacement
  237. Engine ID help
  238. os.18cvrx 11j rotoary carb wont start
  239. FP-60 liner
  240. 1.20 FM OS not running
  241. Replacement bearing for OS .30VG-P
  242. O.S. FSa-81 Carb Settings
  243. 15CV-R or AQ .18 more powerfull?
  244. OS .18CV-RX Crankshaft question
  245. OS 61 SF-P, PD-02 pump unit question.
  246. OS FS 91 Break in / running fuel
  247. 25VF and 25VF-DF Crankshaft Specs
  248. OS 1.60 dies in air
  249. OS 300 5 cyl
  250. .21 VZ-B V-SPEC (T)