I personally find that your last post was offensive. If you expect to get any help on this or any other forum you need to brush up on your forum etiquette. Using large bold letters is the same as yelling.
First of all you came to this forum not even knowing what boat you had, you could have determined this yourself the way I did, just google 19xx Challenger until you found your boat. Then you said you had a problem, a vague problem and you didn't provide us with any symptoms.
A Mercury powered Seadoo boat is not for everyone, it is hard to find a mechanic to work on them, so if you don't feel comfortable working on the boat yourself and cannot find a mechanic to work on it then maybe this is not the boat for you.
Lou