I have begun noticing my electric start f20 Yamaha starting and immediately revving over normal idle speed. Sometimes it takes a minute other times up to ten before it slows down. I'm uncomfortable shifting in and out of gear with the engine cycles still in high. Is this likely a warm up feature, or maybe the beginning of a computer problem. I'm just about to move it over to my new skiff and if it looks like I need to get a tech involved, I'd rather do it now instead of look at a new boat in the garage with no working engine.