engine # 0L337374 195hrs Glastron ski boat starts fine and idles fine when cold to warm. Takes off like a rabbit. Does not miss at idle. After I get out about 400 yards from the ramp it spits, chokes, backfires, and dies. Its hard to start and just idles back to the ramp(give it to much gas and it backfires and dies). Fuel all seems to be fine(filter, pressure, lines) and has fuel at carb when it dies. Replaced coil and going to replace plugs(factory). Dist cap looks fine (no cracks seen). Someone pulled and installed boots on outdrive a few weeks ago and has not run right since. I don't think any service has ever been done. Just scratching my head on this and any help would be great.