I have a 1983 Cat 30 with a Universal 5411 and have the standard 2 blade prop. Everything was fine when I put her away for the winter. Well, when we started her up this spring we noticed that she is beginning to blow a little blue smoke and doen't sound like it is reving out all the way and speed is down a lot. So, could a fouled prop cause all these problems? She wan't hauled this spring, but was in the spring of 1999 and I used good paint. So, what would you check first?