91-AC Supercharged 4 Cycle engine NEW. Bore : 27.7 mm. Stroke : 24.8 mm. Displacement : 14.5 cc. Practical rpm : 2,000 13,000 rpm. The item “YS. Futaba F91-AC Four Cycle Superchared Engine NEW” is in sale since Friday, October 8, 2021. This item is in the category “Toys, Hobbies\Radio Control & Control Line\RC Model […]