However, the error causes no problem at all, it is just superfluous and I am pedantic, so here goes:
Timing belts for many outboards come with the tensioning instructions of installing the new belt per TDC, then rotating the flywheel two times in the normal direction and then 1-2 or three teeth in opposite direction to potentially take up slack in the belt before tightening the tensioner pulley.
As can be seen in my 2008 manual, the directions are two turns in one direction and then three teeth in the SAME direction. Superfluous. QED
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