2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 240Get this manual
POWER UNIT
9While aligning the one blue plate of timing chain with the match mark () on the EXcamshaft timing sprocket 8, fit the chain onto the sprocket
3Blue plate
10Install the EXcamshaft timing sprocket on the EXcamshaft, then temporarily tighten the sprocket bolt