Thanks to my daughter I bought this OS .56 fourstroke. engine. This thing really hates to be rich, it hammers like a Mack 711 when even a little rich. I gave it a 70 minute run at various rpm starting with 10 minutes at 4,000. Rotated the carb for better throttle line up.
OS .56
Prop==Bolly 12.5x6
Fuel==Wildcat 10% with 18% synthetic lube
Plug==OS-f
Max rpm=9.900
Idle 2,200
Muffler==Stock, nice sound and very quiet.
Last edited by Hobbsy; 05-18-2015 at 02:46 PM.
Reason: Add content