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  1. Engine screams with throttle closed, crack/air leak?
  2. .91 crankshaft part number.
  3. OS FS200 typical RPM?
  4. OS 200FS lost compression
  5. os .18 tm problem
  6. OS61RF pump exploded view
  7. 91fx piston cleaning
  8. turbo plugs
  9. OS FS-80 - anno 1982 version
  10. OS21tm Crank
  11. 91FX getting hot
  12. OS 91 FS Surpass Prop.
  13. OS 91 Surpass II
  14. muffler
  15. O.S. .120 Surpass Retrofit
  16. OS 120 surpass E plumbing??
  17. OS 4 Stroke valve kit
  18. OS 91 S II
  19. Difference between Surpass and Surpass II?
  20. OS 61 MAX SF
  21. OS91 heli engine cutting at mid power
  22. Os 91 Fx
  23. OS 46fx
  24. Fr5-300 sirius breather nipple
  25. OS FL-70 idle problem
  26. Accurate compression test.
  27. OS FS .90 Surpass priming help.....
  28. 55 AX vapor lock
  29. OS 55ax new (15611) vs old (15610)
  30. Problem with OS 61FX
  31. OS .21TM Fuel Question?
  32. Leaking front bearing
  33. OS 46 AX fuel feed problems
  34. Surpass parts interchangeability
  35. OS91FX Props
  36. 65 LA cover plate LEAKS alot
  37. FS120 series iii regulator leaking.
  38. OS50SX ringed
  39. FS-91 Surpass Cylinder Head
  40. l
  41. FS 91S II-P woos
  42. FS110a how to upgrade to pump version
  43. O.S. 46AX Idle speed
  44. OS Aluminum Eng. Mount 904
  45. Which OS max do I have??
  46. 95 AX run in problems.
  47. O.S 120 III pump
  48. Starting
  49. Do New OS 55hz's have difficulties???
  50. .10 FSR Muffler Question
  51. O.S. Muffler
  52. OS .46FXi
  53. Muffler Extension
  54. OS 1.20III pumper
  55. Carb barrel stop screw
  56. Fuel-Oil% for O.S. 18TM
  57. FS-120, Crank Turns, Piston Frozen
  58. OS 61 RF
  59. O.S. FS-200S-P
  60. O.S. 18 TM
  61. dimensions of O.S. 160
  62. Head gasket for 46 AX
  63. OS 160 Fuel tubing/filter/clunk size
  64. 4-Stroke dissasembly
  65. OS 1.60 Advice
  66. OS .61 SF- ABC or Ring?
  67. OS Surpass FS .91 inverted question
  68. where can I get a crankshaft?
  69. 75AX Tank Size?
  70. OS 91FX con rod assembly
  71. tank position
  72. OS V Spec
  73. 25FX
  74. O.S. 10 FP
  75. OS 40 VR-P
  76. OS FS-30S 4stroke valve spring breaking
  77. OS 30sf 4stroke
  78. Porting the OS 30VG
  79. what glow plug
  80. old o.s. 20 AND .25
  81. crankshaft
  82. OS 91FX being discontinued
  83. O.S.61SF carb
  84. can i use heli 20% nitro / 19% synth oil in a 1.20 with pump?
  85. OS 65 LA Low Speed Adjustment
  86. A3 or New A6 Plugs
  87. After run oil to an OS 120 FS III
  88. OS MAx 1.20 AX with Power Box Muffler:
  89. OS 61 Long Stroke.
  90. os .15 tank
  91. New OS 4-stroke pricing structure..not making sense?
  92. .55 AX Prop Clearance
  93. OS 30VG exhaust pipe
  94. OS VFDF .25 Gaskets
  95. Installing Piston and Sleeve on OS 46FX
  96. O.S. FS-91 II Surpass valve question.....
  97. OS FS header pipe
  98. headers for OS 18TM
  99. 18tz Low RPM Overheating
  100. OS FS 91 Pump ( Surpass II )
  101. OS Max 20FP question
  102. OS engine suggestion ...
  103. OS engine suggestion ...Bax!
  104. 91 Surpass Crankshaft/Camshaft Install
  105. OS exhaust manifold for OS 81 FSa in Great Planes Reactor
  106. prop nut spinner for os ft 160
  107. OS 50 Hyper Full of Oil - No really full!!
  108. ABout buying an OS FL70..
  109. Pitts muffler for side mounted 1.10 4-stroke
  110. OS 46 AX
  111. Os Max FT 240 twin..
  112. .90 FSR for speed
  113. Temperature value for a heli 55HZ-H
  114. 120 AX remote needle valve
  115. 120 AX remote needle valve
  116. OS FS 90
  117. OS 46 AX damage
  118. OS 110 FSa problems
  119. OS 46Ax transition
  120. Problem Tuning-Transition OS55AX
  121. DOES ANYONE KNOWN WHERE I CAN GET PARTS FOR A OS77DUCTED FAN ENGINE!!!!
  122. OsFS61
  123. Cyl/piston
  124. fuel
  125. OS 1.20 S III pumper
  126. OS 110FSa exhaust silencer keeps coming loose
  127. older O.S. .40 question
  128. OS 28XZ tech question
  129. 91 FX muffler
  130. cam timing OS 81FSa
  131. O.S. 120 surpass II idle mix?
  132. os 70 ultimate help plese
  133. O.S FT-300 compression ratio?
  134. os55 prop size
  135. O.S .18 TZ engine
  136. OS 55AX Carb ??
  137. Help with settings on FS-200S-P
  138. WD40 as afterun oil.
  139. OS .37 Carburetor Slop
  140. os21vg wont start
  141. Prop reamer
  142. Need help with OS91 FS II
  143. prop for ft-300
  144. os 140 rx pump
  145. parts for 40/45 FSR
  146. OS 81FS a question
  147. What's the difference?
  148. os 25
  149. Removing Blue Color 40 LA
  150. OS FS120 Muffler?
  151. OS 110A Prop?
  152. OS 91 Surpass
  153. OS 95AX inverted Pitts muffler question
  154. OS 160FX crankshaft seems to wiggle
  155. O.S. Engine After-Run Recommendations
  156. 18TZ
  157. 60FP parts
  158. OS .18 CV-RX
  159. OS Gemini 160 twin 4 stroke
  160. OS 110a RPM?
  161. OS 1.20 Surpass III w/pump question?
  162. O.S 120 FS pre Surpass
  163. OS 91 Surpass Pumper
  164. 120AX bearing change out
  165. 120AX bearing change out
  166. OS 10 FP,FSR, LA etc
  167. OS F glow plug ???
  168. OS .50 SX-H ringed hyper acting up
  169. older .48 surpass parts
  170. Is there an idle mixture adjustment on the 10H Carb?
  171. .46 LA Non Ringed - Break in and best fuel?
  172. OS .61 SF (circa 1987) Needle Valve Replacement
  173. FS-200S-P Engine Mount
  174. OS 60 FSR or 60SR Engine what is the differance in them
  175. OS 160FX Crankshaft Shear
  176. 7L carb
  177. FS120 Cyl Liner
  178. Hyper 50 sputter problem
  179. 7L carb
  180. Tank Position
  181. Old OS Overhaul Service Available?
  182. FS 120 Surpass pumped
  183. 7L carb
  184. How do you actually check an Injector?
  185. .81 alpha propeller for 3D.
  186. 7L carb
  187. OS 140RX Need Help
  188. OS 21TM needle settings
  189. Are OS FS91 series carbs interchangeable?
  190. OD 70 surpass camshaft cover
  191. found out the easy way
  192. os fs 70 surpass
  193. 2 stroke carbs in general
  194. OS 70 Surpass - Low speed/idling issue
  195. OS 91 FX - rattling noise
  196. OS Carb Parts
  197. O.S. 55AX Muffler question
  198. Bad bearings not covered under warrenty?
  199. need shaft dimension for this OS part
  200. OS 25FX
  201. 3-needle carb heli engines... cannot seem to tune them!
  202. O.S. FS-90
  203. OS 46 LA (Natural)
  204. 55AX Inverted Brake in
  205. Sirius 300 Radial
  206. 55ax carb housing
  207. O.S. 95AX Questions?
  208. OS 91 FX:Slimline Q vs Bisson Muffler-Pitts style
  209. O.S. FS-26S-C II 4-Stroke
  210. 55 Ax Prop ?
  211. OS4A Carb
  212. OS FS110 A muffler
  213. 40 fp muffler exhaust extension
  214. Replacing The .25FX with .25AX WHY?
  215. os 75ax
  216. os .18cv-r clutch ?
  217. O.S. FS40 Surpass Ringed is it enough power?
  218. advice for a clone 91
  219. os 4strokes
  220. OS 25 FX Muffler Screws
  221. MOVED: Throttle Arm for FS-91 Surpass II?
  222. 46 FX help with Con rod
  223. cylinder head bolt stripped removal???
  224. Os 46 sf carb or barrel replacemnt ?
  225. Surpass lll Manufacturing defect
  226. .81 Alpha question and 55AX.
  227. 55AX vs. 61FX?
  228. Old Surpass parts
  229. LA vs AX
  230. .28 XZ Truggy Engine tuning/heat issue
  231. OS 120 Surpass 111
  232. OS 50 SX fuel problem. Please help.
  233. .91 surpass bearings
  234. New OS 120AX back plate rubbing
  235. OS46SF Counter Rotation Crankshaft
  236. OS FS 91 Surpass I Valve springs.
  237. Surpass 1.20 III pumped idle problems
  238. Slimline compact pitts on a 55AX
  239. 40 Fx Needle Valve
  240. OS55AX
  241. OS 91 FX
  242. Max55AX quit in Torque Roll
  243. OS 46 AX main bearing removal
  244. OS 1.60
  245. 120AX deadsticks
  246. OS 120 Surpass 111
  247. O.S FS-120S-E Four Stroke Q's
  248. MOVED: OS .46 FX vs AX
  249. OS Max III 35
  250. BAX, A FOLLOW UP OS 120 QUESTION???