Honda Outboard Motor BF135A Owner's Manual page 108

TECHNICAL AND CONSUMER INFORMATION
BF135A/BF150A Tune up
Spark plug gap (do not adjust)
Idle speed
Valve clearance (cold)
Other specifications
106
0.039 0.051 in (1.00 1.30 mm) − −
750 ± 50 rpm
Intake: 0.23 ± 0.02 mm
Exhaust: 0.30 ± 0.02 mm
No other adjustments needed.
See page 67
See shop manual
See shop manual