I'm selling one of my OS FT 160 Twins, going gas or electric. Have had 5 or 6 of these and loved every one of them. Still have 2 or 3 of them. The sound they make, the low idle speed, easy starting, low vibration and respectable power. This is in great shape, still has good compression and no bearing issues. I am a believer in castor oil in my fuel. 25% of lubrication package is about right. I've never used alot of nitro 5% in summer 10% in cold weather. Box matches serial number on engine, I did put the new style carburetor on it, made them alot more reliable.