Had boat out for the 7th time this year but this time was first time out with new alternator ran it about 4 hours pulling tube went to head home and felt a thud in throttle shifter boat died got started 3 more time on water but rough idle then it die when you gave it gas got home would turn over no spark alternator was hot as heck put old one back on and now its backfiring out carb like timing off please help.
