spareparts
God
as previously stated, the fact that those engines are still running should be a good indication of their value. But be prepared when dealing with opti's, it is best to run the opti oil( expensive), and parts for those motors can get expensive real quick( the recomended platinum spark plug retails in the $25 range each), there are a lot of non serviceable assemblies that have to be replaced, not repaired when they fail. What would be minor issues( or non existant) on carb or efi engines, can be major issues on optis and easaly exceede the value of those motors.
As far as performance goes, I've seen dyno test on those motors and they put out closer to 250 than 225, and they are one of the most fuel efficient big outboards i've ever run. In 2000, I ran a 23 SeaCraft to the Georgetown hole and back with a 225 opti( 70 odd miles each way), in a whole lot rougher conditionds than we had any business being in ,and we burned less than half a tank of fuel( can't remember how much it was)
As far as performance goes, I've seen dyno test on those motors and they put out closer to 250 than 225, and they are one of the most fuel efficient big outboards i've ever run. In 2000, I ran a 23 SeaCraft to the Georgetown hole and back with a 225 opti( 70 odd miles each way), in a whole lot rougher conditionds than we had any business being in ,and we burned less than half a tank of fuel( can't remember how much it was)