Honda Outboards BF40A/BF50A Service Manual, Page 111Get this manual
HONDABF35A45A PUMP BODY 1.0STANDARD 50.15-50.18 mm (1.974-1.975 in) SERVICE LIMIT 50.20 mm (1.976 in)
INNER ROTOR-TO-OUTER ROTOR CLEARANCE
STANDARD 0.15 mm (0.006 in) MaxSERVICE LIMIT 0.20 mm (0.0079 in)
INNER ROTORTO-OUTER ROTOR