Honda BF50 (5HP), BF5A Outboard Motors Shop Manual 2014, Page 8Get this manual
BF50BF6A
4MAINTENANCE STANDARDS
Item Engine Carburetor Idle speed Cylinder compression Main jet Pilot screw opening Float height Opens Valve lift Gap Valve tappet clearance Valve stem 0.0Valve guide 1.0IN EX IN EX IN EX IN EX Standard 1,300 100 rpm (in Forward) 4.5 kgcm (64 14 psi)600 rpm #75 2-38 turns 9.0-11.0 mm (0.35-0.43 in) 50_54C (122-140F) 3-4 mm (0.12-0.16 in) 0.7-0.8 mm (0.028-0.031 in) 0.06 0.14 mm (0.002 0.006 in) 0.11-0.19 mm (0.004-0.007 in) 5.48 mm (0.216 in) 5.44 mm (0.214 in) 5.50 mm (0.217 in) 5.50 mm (0.217 in) 0.020-0.044 mm (O.OOOS-O.0017 in) 0.060-0.087 mm (0.0024-0.0034 in) 0.8 mm (0.03 in) 29.60 mm (1.165 in) 27.710 mm (1.0909 in) 27.747 mm (1.0924 in) 13.984 mm (0.5506 in) 23.15 mm (0.911 in) 015 mm (0.006 in) max 0.15-0.21 mm (0.006-0.008 in) 11 .98 mm (0.472 in) 12.00 mm (0.472 in) 0.02-0.09 mm (0.0008-0.0035 in) 59.985 mm in) 18.002 mm (0.7087 in) 18.000 mm (0.70S7 in) 0.002-0.014 mm (0.0001-0.0006 in) 0.015-0.045 mm (0.0006-0.0018 in) 0.15-0.35mm (0.006-0.014 in) 60.000 mm (2.3622 in) 0.015-0.050 mm (0.0006-0.0020 in) Service Limit