No that line dumps a buttload of water out of the pipe , it will increase the water pressure inside of the pipe which will make it flow more into the pipe causing running issues with the ski if it is not dumped out somewhere , those pipes already need to be dried out some , I would pop a hole and put an outlet in the hull somewhere or barring that drill and tap the stock exhaust outlet for an appropriate fitting, or just swap the outlet out , here is one for a little over $12.00 and the pic in the link shows you where the hose is supposed to go, I assume your Raider had a 701 61X engine in it if there is no fitting.
Exhaust outlet off of a 1995 yamaha waveraider 700 FRESH WATER MACHINE in good condition will fit other years and models.
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