Around 1989, Mantua switched over from open-frame motors to Sagami can motors, and offered the can motors as a drop-in retro refit. If you search around online you might find one of those for a decent price. (That should be what came with your engine if it was made in 1996.)
NWSL has replacement cna motors. also look for beuller motors.
Shane
A pessimist sees a dark tunnel
An optimist sees the light at the end of the tunnel
A realist sees a frieght train
An engineer sees three idiots standing on the tracks stairing blankly in space
A Mantua 2-6-6-2 seems to need a new motor. It is the 1996 version with a tender and can motor. Anyone done this and recommend a replacement motor?