Honda Outboards BF40A/BF50A Service Manual, Page 12Get this manual
HONDABF35A45A
MAINTENANCE STANDARDS
Unit: mm (in) Part Engine Idle speed Cylinder compression Carburetor Main jet Pilot screw opening Float height Spark plug Valves Gap Valve clearance Stem 0.0Guide 1.0Seat width Spring free length Stem-to-guide clearance Rocker arm Rocker arm 1.0Rocker arm shaft 0.0Rocker arm shaft-torocker arm clearance Piston Skirt 0.0Piston-to-cylinder clearance Pin hole 1.0Pin 0.0Pin-to-pin hole clearance Piston ring Ring side clearance Top Second Oil Ring end gap Top Second Oil Ring width Cylinder cylinder head Cylinder sleeve 1.0Distortion of cylinder head 1.0of camshaft journal Top SecondIN EX IN EX INEX IN EX INEX IN EX Item Standard 950 50 min-' (rpm) 15 (212 14 psi) at 500 min-! (rpm) kgtcm #102 2-18 turns out 14 (0.6) 0.6-0.7 (0.024-0.028) 0.13-0.17 (0.005-0.007) 0.21-0.25 (0.008-0.010) 5.480-5.490 (0.2157-0.2161) 5.460-5.470 (0.2150-0.2154) 5.500-5.512 (0.2165-0.2170) 1.25-1.55 (0.049-0.061) 1.25 -1 .55 (0.049 -0.06136.9 (1.45) 0.010-0.032 (0.0004-0.0013) 0.030-0.052 (0.0012-0.0020) 14.010-14.028 (0.5516-0.5523) 13.976-13.994 (0.5502-0.5509) 0.016-0.052 (0.0006-0.0020) 69.970-69.990 (2.7547-2.7555) 0.010- 0.045 (0.0004-0.0018) 18.002 -18.008 (0.7087 -0.7090) 17.994-18.000 (0.7084-0.7086) 0.002-0.014 (0.0001 -0.0005) 0.040-0.065 (0.0016-0.0026) 0.015-0.045 (0.00059-0.0018) 0.055-0.140 (0.0022-0.0055) 0.15-0.3 (0.006-0.012) 0.3-0.45 (0.012-0.018) 0.2-0.7 (0.0079-0.028) 0.990-1.025 (0.0390-0.0404) 1.190-1.225 (0.0469-0.0482) 70.0-70.015 (2.7559-2.7565) 0.05 (0.0019) 23.0-23.021 (0.9055-0.9063) Service limit