Had our boat on the water today tubing and we got it to the dock and it all of a sudden will not start. Its not the battery or plugs because they have just been put in. Every now and then we get a little noise when we try to start it but not often. The boat is set in neutral so the setting is also jot the issue. The thing that stinks is we're smack Dag in the middle of our vacation. Please help...thank you