Id say its just a new and tight engine, some engines are tighter than others. My novarossi turned over easily new. Orion on the other hand, i had to make sure the flywheel had as much travel as possible hitting tdc or my starter box wasn't able to turn it over. I know i have been ruled out earlier but an engine that tight with a 12v battery will take a lot of trying to turn it over. Sent from my iPhone using Tapatalk