I just synched the carbs on my 1997. They were ok, no adjustment needed. The adjustment screw still had locktite on it. Mine does not have a prime position. I used a vacuum line T from Autozone. I have a big plastic jar of them, all shapes and sizes. I used a Motion Pro mercury synchronizer I bought before they quit making them. Synchronizing carbs is becoming a lost art with the advent of EFI. I always got a lot of satisfaction out of it. Purely mechanical, no computers involved.