Honda BF135A, BF150A Outboard Motors Shop Manual., Page 751Get this manual
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BORE AND STROKE CC 57 0.25 NA NA 0.060.10 0.090.13 16952-ZE6-000 NA 12 2.5 19002100 CR5HSB U16FSR-UB 0.70.8 0.20.6 25 NA NA 0.20.4 0.13 +1-10
SPARK PLUG GAP
0.60.7 0.30.5 27