I have a 89 smokercraft with a 5.0 omc and cobra drive. The gears were out of the lower unit when I bought it. I had a guy rebuild it and It was fine the first 2 times on the water. The third time was in the river and stopped for a minute, went to put it into gear and heard outdrive making noise. Shut it down, took home and the gears were out again. Now I need some advice. Don' t want to sell the boat cause my family loves the water. Is there a cheaper route than paying 2500 to 5000 for a new rebuilt outdrive.