Ignition switch on pump engine not working properly. EE tried to turn crankshaft to get flywheel & starter in time. He grabbed fan with l. hand & pushed fan belt in with r. hand. The engine started with key in off position & pulled his r. hand fingers (index & middle) in between fan belt & crankshaft pulley. Severed fingers (index: middle phalange; middle: distal phalange).