Re: 1985 Hydra Sports Boat VL-485
Greg: I had the exact same question about a boat I recently purchased.. It was the question that brought me to the forum.
Basically, you will not find anything on the boat itself. The company I was looking for went out of business in 1993.. Well before any of the manuals could make it to the internet. There is 0 information out there about the boat company.
What you should be looking for, instead of a manual for the boat, is any information you can find about the engine and the drive. Basically, every boat is nothing more than a fiberglass shell. Doesn't matter the make/model of the boat-they accomplish the same thing, and work in the same way. The major differences, beyond cosmetics, lay in the engine and the drive.
If you pull the serial number off the engine and drive, you should be able to find information and manuals for those items. These are FAR more valuable than anything you can find on the boat.
Good luck in your search!