Will an Evinrude choke cure choke problems on a 1999 Yamaha 9.9hp 4 stroke outboard? I was told that it can be done on a 150hp successfully, just wondering if that is even true? I have a 1999 9.9hp 4 stroke Yamaha that has perpetual cold starting problems. Unless I remove the cowling and cover the choke screen with my palm it won't start. That gets a little tiresome having to do that every time I want to start the engine, especially if I have to do it on the water. If an evinrude choke in fact will fit and will work better what are the parts I need to order and does anyone have any experience with doing this and how? lot of questions but I really need help with this motor?? Bob W