Just tried starting my 4stroke 9.9hp johnson to get boat ready for water and now it wont start,tried a few days ago,it started for one second then stalled.it started raining so i just got back out today to try again. Still nothing. Pulled plugs and theres, no spark.it has a key switch and theres push button start on motor. Every so often i start up my motors to keep batteries charged. It worked fine a few weeks ago. Havent done anything to the boat since.no spark, where to start?