We have a yazoo with a 23hp kawasaki motor. 1050 hours, just got it out of the shop this morning after having the ignition coils replaced. Started up and ran good... for about 2 hours. Then apparently the engine shut off and wouldnt start. Shop says the motor is siezed. I stopped by and it looks that way. Start tries but the crank wont turn. Engine oil is on the low size, just below the ADD mark. Not to mention its black. (Im guessing this is cause) Is it possible to somehow unseize this thing, and get it running again? Where should I start, aside from topping it off with fresh oil. Thanks.