warranty

I have a 2012 Challenger 210 SE 430. Its a great boat and we have used it a lot. It has been used in salt and fresh water but a decent amount in both, about 150 hours combined. I am having an issue with corrosion on the reverse gate and reverse support. There is also some corrosion on the bottom...

I can't seem to find this on the internet ... what's actually covered by Seadoo's 1st year warranty and subsequent B.E.S.T. warranty? e.g. engine, steering cable, instrument cluster, seat vinyl, battery, etc. What is specifically not included other than the hull?

In May, I bought a brand new 2010 Seadoo RXT-X and 2009 RXT iS. I got a FOUR YEAR extended warranty with the purchase. In the course of three months, I have put 15 hours on both of the ski's, and paid the dealership over $600 for the 10 hour maintenance. I have had a couple of minor issues...