Could be nothing
You won't feel the A-4 going into reverse. Actually on the A-4, there really is no reverse per-se. It is basically a metal band that tightens around a cylinder which stops it and causes the reversing gears to engage and spins the prop the other way. The only real indication that you're in reverse is the boat moving aft and a mild whining noise (which I was told is normal!)If you are able to reverse without any difficulty, then everything is probably OK. If not, the reversing gear may need to be adjusted. You can get the instructions through Moyermarine.com. It is a fairly simple process, especially on the C-30 since the gear box is accessible. I would have another person with you though since the adjustments are confirmed at the shifting lever. It will save you alot of trips up and down!!I just did some adjustments last month so I can send you instructions on how to adjust it if you like, however if everything is working fine, I wouldn't mess with it. If you haven't been on the Moyer site, check it out and sign up on the forums. Don usually answers every question within a few hours. It's a great resource for info and for parts.Jack Mannings/v Vicitm of FateAtlantic City, NJ