ok rebuilt top end of my 2001 spotsman 400.. new piston/rings and set valves.. it will not start.. i can hear exhaust as i turn engine when trying to start.. pilled plug wire and put plug in it.. grounded to maching turn engine and spark is a orange color.... shouldnt it be a bright blue/white color?????? if i spray starting fliud it will not start..... what can i check ? or could timing be off? does anyone have a good how-to on timing i couldnt find one.. please help me get this headache start!!!!