Re: Correct Serial # for 150?
Those would be your model numbers.
The first one, is a 1992 "C" model.
Serial number would between 25500 and 27576
The second one, is a 1991 "J" model.
Serial number will look something like ox24736
The serial numbers don't really matter.
All parts are found by model number.
Most all components should be the same.