View Full Version : O.S. Engines Support



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  1. How to take cooling head off .21tm?
  2. New OS 81 4-stroke
  3. OS 52 Four Stoke Break-In
  4. Good plugs for the .21TM?
  5. OS 70 Ultimate carb question / solution
  6. OS 20 FP
  7. Gasket Set cross reference?
  8. o.s. .18tm carb?
  9. 15CVR-X and 18CVR-X Starting shaft interchangable?
  10. OS18TM question
  11. Missing Screw Size?
  12. FT 160 Gemini
  13. MOVED: Magnum XLS 52
  14. 91 Surpass II pump problems (HELP)
  15. New O.S. 81 4 stroke [ abit warm ]
  16. 3D prop for .46 AX??
  17. OS FT-160 valve adjustment
  18. 46AX - Fine grit in filter after break in
  19. O.S. 91 C-Spec conversion to acft.
  20. OS 120 surpass III w/pump
  21. OS18TM problem
  22. 55ax muffler
  23. OS 91 FX Muffler
  24. Hyper 50 Blown Piston again!!
  25. os 18tz head
  26. 46AX Liner issues
  27. 120 AX Break-in Prop
  28. 1989 OS MAX 46 SF-S abc STARTING PROBLEM
  29. rpm surging 4stroke 52 surrpass
  30. OS18 TZ Pbs
  31. 120 ax max recommended rpm
  32. 50SX-H Hyper rich low end
  33. os 70 surpass, stopping
  34. FL70 muffler pressure to the sump
  35. FL-70 loss of power
  36. OS 52 4 stroke will not idle
  37. OS FS-52 4stroke in hot weather.
  38. vspec problem
  39. OS 200 FS settings ??
  40. In need of a 70 Surpass II crankcase - Discontinued?
  41. OS 61 FX dead sticking
  42. OS FS61 head screws
  43. AX55's
  44. O.S 55AX vs. 61FX?
  45. O.S. 61 Question?
  46. where are os .21 vzb manuals online?
  47. Will gasoline damage O rings?
  48. Which engine is that???
  49. Fitting Prop to an OS FT 240 (300)
  50. OS .32 sx cylinder head???
  51. 55 AX Mid Range
  52. OS FS61 cam bearing removal
  53. OS 21 VG stall after half tank
  54. replacement piston ring for OS MAX 50 SX
  55. OS 91FX Problem
  56. FS-1.20S III
  57. OS 18 cvr won't say running?
  58. OS18TZ-TX crankshaft into 18TM
  59. Bearing replacement OS 1.20FS Surpass
  60. 91 surpass vs 91 surpass pumped
  61. 91 surpass factory mixture setting
  62. O.S. .18 cv-rx
  63. OS 91FX Break-In help
  64. 4 cycle assembly question
  65. FR5-300 Sirius radial being discontinued?
  66. A3 plugs vs the RCAT glow starter
  67. Motor mount for OS 200U
  68. OS Carb
  69. idling screw
  70. Which fuel for both O.S. FX25 & O.S. FS56a
  71. Honing a 46 FX
  72. OS70 backfiring
  73. Minor pitting on piston.
  74. OS 61FX lowspeed Needle valve location?
  75. OS46AX engine
  76. fs91/p adjust...
  77. .46 LA fuel and prop recomandations
  78. fs-91/p breakin problem
  79. Best prop for OS 1.20 AX
  80. O.S. 15 LA Won't Start
  81. FS56a RPM
  82. YS/Saito 20/20 in OS 46FX
  83. parts for 2nd gen. 1.20w/pump
  84. new 37SZ-H Problem
  85. o.s 21 tm tmaxx minifold
  86. Vspec VZB .21 (possible connecting rod dmg?)
  87. OS 61 RF Thrust washer
  88. os .21tm factory settings
  89. 91fx max rpm
  90. Hyper 50 problem??
  91. Rust: pre-existing ??
  92. Trouble With New OS .46AX
  93. OS 91FX can't shut down
  94. OS .61 FSR carburetor
  95. O.S. .50SX Bearings
  96. 18CV-R and 15CV-R
  97. O.S. 4BK Carb Replacement
  98. Engine ID help
  99. os.18cvrx 11j rotoary carb wont start
  100. FP-60 liner
  101. 1.20 FM OS not running
  102. Replacement bearing for OS .30VG-P
  103. O.S. FSa-81 Carb Settings
  104. 15CV-R or AQ .18 more powerfull?
  105. OS .18CV-RX Crankshaft question
  106. OS 61 SF-P, PD-02 pump unit question.
  107. OS FS 91 Break in / running fuel
  108. 25VF and 25VF-DF Crankshaft Specs
  109. OS 1.60 dies in air
  110. OS 300 5 cyl
  111. .21 VZ-B V-SPEC (T)
  112. .30 VG rotostart?
  113. 30 VG "safe" temps...
  114. OS 91 Surpass header
  115. OS FSa 56 problem
  116. Cooling head for .30VG
  117. O.S. 40LA needle valve + airbleed screw setting.
  118. O.S. FS-91 II Surpass w/Pump fuel tank location?
  119. os.18cvrx w/11j rotary carb
  120. os 40la screw help
  121. O.S 1.6fx new ring
  122. .91 FX + Macs Tuned Pipe Questions
  123. OS18TZ standard shaft with rot carb ?
  124. OS 15 FP RPM
  125. "Locked Up": Drive Hub and Woodruff Key
  126. OS 200 4/C question
  127. FSa-56 Inverted mounting
  128. FSa-56 fuel
  129. OS .21RG non pullstart
  130. MOVED: cordless starter
  131. O.S. 55AX Inverted Mount Problems
  132. o.s 55ax
  133. os 70 surpass 2 drive washer
  134. OS VSpec #13895
  135. OS .55 AX Funfly
  136. MOVED: O.S. .81 FS-A
  137. O.S. 160 Sleeve repair Question???????
  138. O.S 52 surpass carb adjustment
  139. Pattern prop for new OS 91FX
  140. FS120 Series II pumped - fuel leak at regulator
  141. .26FS Questions
  142. O.S. 61VR-M Connecting rod
  143. which 3 blade prop for 91fx?
  144. OS 25 FSR Backplate and gasket
  145. OS 46SF P VS 46FX
  146. OS 75AX Pitts style muffler questions
  147. O.S. 21 V-Spec
  148. 91 fx carb replacement
  149. 91FX prop rpm
  150. OS 50SX-H graduation markings ??
  151. Factory slide carb settings for OS Max 12CV
  152. OS 61fx corrosion
  153. problems with .46 FX H SOLVED!
  154. OS 91 FS surpass
  155. OS FT-120 II - ideal rpm
  156. ft160 low compression
  157. OS 1.20 Pumped Motor Mount
  158. Alternate OS break-in procedure?
  159. Correct spec 18TZ-X
  160. Advice on maintenance of OS
  161. OS 15CV-R and 18CV-R take the same header?
  162. Air bleed screw for Max-H 40
  163. 25fx
  164. Ring for old OS50 Max
  165. OS.46 FXI needle valve
  166. Help with An OS.46SF-P
  167. Glo plugs for older OS engines.
  168. 40 LA Question
  169. Fuel line connections on 160 twin?
  170. OS .25 FX
  171. .46 FXi and .46AX
  172. MOVED: Just ordered the os 75 ax
  173. O.S. FS-90 Carb
  174. OS .61 FX break in prop
  175. OS 18tm meter valve problem
  176. AX55 After market muffler
  177. O.S. FS-26S-C II 4-Stroke cam bearings
  178. OS 140 RX rear exhaust gasket
  179. OS 46 AX
  180. os fs 40 surpass 4 stroke engine parts
  181. o.s 21tm
  182. I need the part # for the 10E-R carburetor for my .12 cv-r engine?
  183. Gasket material for OS engines
  184. OS 4 stroke runs best upright or inverted?
  185. FS-91SII Fuel doesn't flow to carb
  186. OS 120 Surpass - Pump or no pump?
  187. TIMING MARKS IL 300?
  188. OS FT-120 Gemini engine
  189. lube for os 2stroke engines
  190. OS-40LA idle problem
  191. .50 SX Low on power
  192. Removing camshaft bearings?
  193. OS91FX+TUNNED PIPE
  194. need help tuning a os max cv-r
  195. OS FS 120 WRIST PIN REMOVAL
  196. How do you remove OS .30 VG rear bearing?
  197. OS .46 support.
  198. OS 91FX Head Gasket Leak?
  199. Os 46ax Muffler problem
  200. 15CVR and 18CVR carbs interchangable?
  201. OS vz-m WONT STAY RUNINNG
  202. do the OS FS engines come with any tools?
  203. O.S. 30 FS Surpass Ringed Engine
  204. intake stack for OS carbs?
  205. OS .30 VG symptoms
  206. High end and low end for .70 Surpass II
  207. OS.91SX-H C SPEC PS- VIPER
  208. OS 21VZ-B V-Spec-T HELP
  209. OS 46 SF ABC
  210. OS 55AX Carb loosening
  211. .12tz carb restrictor/ break in on crt.5
  212. 2 O.S. engines, same problem
  213. OS FT 160 Twin Cam Timing
  214. Problem running .12tz (5)...help pls..
  215. Chart Method to find years of manufacture- Help
  216. The elusive 75AX Ringed engine....
  217. Info on my OS 70 Surpass engine?
  218. OS Max 12TZ Tuned
  219. Breaking in OS 1.20 AX for pusher config
  220. New 4-Stroke What Fuel?
  221. idling speed
  222. Glow plugs burnt out
  223. os
  224. OS 30VG cutting off
  225. o.s 21tm
  226. Sirius collector ring installation problem
  227. What happen to the OS 70 Surpass II
  228. RE: 32sx piston and conrod
  229. RE: 32sx piston and conrod
  230. OS 70 sz-h for airplane use
  231. Max 12TZ(P) T3 Temperature
  232. 46 AX Head shim
  233. .18cv-r cooling head
  234. OS 91 SURPASS
  235. O.S. 1.20 AX Remote Needle Valve ??
  236. .12CV-X Question
  237. Rerouting exhaust on OS 40 FS
  238. .91FX tuned pipe?
  239. Is there an AX on the way between the .75 and 1.20
  240. FS 200
  241. OS-140 EFI Question
  242. 1.60fx
  243. 0.12 TR with 0.12TZ Turbo Head
  244. OS46AXABL
  245. OS 160 Twin
  246. OS MAX 40-H - Worth to restore?
  247. OS FS-120 Two-Cover Valve Lash
  248. FS 120 Supercharged HELP
  249. OS 77 VRDF
  250. What engine to use

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