Well, to be honest with you, mine blew on me 2 weeks ago and at the time I eas runnimg at about 45 mph and with no sign at all, all of the sudden it just felt like going into neutral along with a strong rubber burnt smell and when I lift the hatch I saw smoke commin out.
Well, not exactly like neutral, cause I could still feell some resistance. Once the boat stopped, I raise the drive and put it in gear and I coul see that the prop was turning at idlle but as soon as I try to rev it would slipp.
But like I said, all day long as well as just before it happend, there was no sign at all. No vibration nothing.
I was heading across the lake the other day and I noticed my rpms would go from 3200 to 3800 every now and then and I hadn't touched the throttles. Also at 3200 I am usually going faster then I felt I was going and of course my speedo wasn't hooked up, forgot to do that before I left, the marina forgot after the drive maint. I did have 2 more people in the boat and 2 full coolers that I normally don't have