O.S. .70 SZ-H ring engine is ringed for long life. 3-needle carb for ultimate tuning precision. (Settings are covered on pages 14 & 15 of the manual). High Speed: 2 turns OUT. Medium Speed: 1 turn OUT. Idle Mixture: Refer to picture on page 14. Two extra mounting lugs on front allow modelers to mount engine securely in helis. Designed with the FAI F3C competitor in mind, allowing 3D pilots an edge over the standard .60 size engine. Throttle assembly reference marks make it easy to note and restore finely tuned settings after maintenance. Front and rear ball bearing-supported crankshaft reduces friction and wear. Large heli cylinder head offers generous cooling fin area, with increased webbing on crankcase front for heat dissipation. Installs in the same space as a 61 engine. This product includes one .70SZ-H Ringed Helicopter engine. #8 OS glow plug and decals.

Muffler & Fuel