Honda BF115A, BF130A Outboard Motors Shop Manual., Page 75Get this manual
HONDA BF115A-130A
4) Remove the 16 49 bolt-washer and the crankshaft pulley5) With the marks on the timing belt driven pulley and on the timing belt lower cover aligned, check whether the "I" mark on the balancer belt drive pulley aligns with the "I" mark on the cylinder block
6Remove the intake manifold assembly (P5-67)7Prepare the 100 bolt8Remove the 12 bolt from the intake side of the cylinder blockFix the balancer shaft (intake side) not to turn using the 100 bolt
BALANCER SHAFT (INTAKE SIDE)
151 12 mm BOLT INSTALLATION HOLE