... technoloty ,2.5HP gasoline engine,,starters:Manual ,high quality with best price generator engine ModelJF152FTypeForced-air-cooled,four stroke single ... For inhalation of fresh gases and emissions, with intake valve and exhaust door. Pistons top center most distant from the ... . Intake stroke, the intake valve open, exhaust closed door. With the Pistons only points from the previous stop point downward ...