I was leaving my mooring for a lift out. It was blowing about f7 and I noticed that a
I couldn't get the revs I needed to make much headway upwind to the crane. This wasn't a huge problem until I tried to do a three point turn using reverse. Although the gearbox changed, again the revs were too low and as the wind gusted up, I simply couldn't get the bows to pass through the wind. I ended up, somewhat fortunately, sideways on and pranged a steel post with my pulpit. We had to rope the boat into the lift out channel with just a few scrapes.
It turned out that the Morse control had broken. The standard Bav one has, oddly a piece that holds the lug at the end of the cable which is made of plastic and it had deformed, preventing full depression of the accelerator cable when turned. It seems a bit silly to have a chunky metal mechanism with a plastic bit at perhaps the most important point. We fitted a new one, which, irritatingly, didn't use the same holes as the former one so a bit of a pain to fit. I'd be inclined to take off the instrument panel and have a look at the control. My boat is a 2001 B40 with md22 55hp.
I'd start the engine (erm, in neutral) and pull the cable at the engine end to check it accelerates fine. If it does, then the problem might be at the control end.