This pawl will work for Rotax motors (Ski-Doo and Moto-ski) Engine type 250 from serial #3155417 on; 277 and 354 from serial #3177748 on; 377,454 from serial #3174789 on; and 503 from serial #3170806 on
I purchased 2 sets (one for a backup) and installed them on my Ski Doo. The parts worked perfect, seems like the old parts just wore away. The new parts are in and working great! I would recommend this item to others.