Honda BF135A, BF150A Outboard Motors Shop Manual., Page 510Get this manual
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BF135ABF150A 7) Remove the shift rod from the shift shaft A
mm WASHER (7)
GEAR CASE ASSEMBLY
[3] 10 40 mm HEXBOLT (7)
34 Nm (3.5 kgfm, 25 Ibfft)