I have an 1988 OMC 3.0 litre with Cobra drive.. Last year I put a new shift cable(eengine to drive) on and ajusted using the guide at funkopolis! got out on the water five times and had a great time! This year I pulled the drive and serviced (lubbed the u-joints and gimbal bearing, drained drive and refilled with gear lube,slapped it all back together put the muffs on cranked her right up and checked her shifting- It was a dream come true- no problems !! headed for the boat ramp.. Put my boat in the water and headed out at idle, when i got out of the no wake zone i put the throttle to her, I then heard a load thunk and the boat acted like it hickupped-- this follow in rapid succession by repeated thunks then came out of gear all the way-- glad i had reverse. made it back to the boat ramp looking very funny-- My question is where can I get a new gear set from? And can i put this together myself --I have a clymer manual, IT says I need a special shiming tool to complete reassyembly, But i have read a lot of postings where people have been doing this themselves, any thoughts ? or helpful ideas I am of limited funds and would like to do the work myself!!