OTTO Excavator Engine Parts Nkr77 4Jh1 Sensor Crankshaft Position 8973066010 897306-6010 8-97306601-0 For Isuzu OTTO NKR77 excavator engine part: crankshaft position sensor (Isuzu 4JH1 engine), monitors crankshaft position. Part nos: 8973066010, 897306-6010, 8-97306601-0