2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 239Get this manual
POWER UNIT
4Fit the dowel pin onto INcamshaftFit INcamshaft timing sprocket and temporarily tighten the sprocket boltCheck that match marks () ef are correctly aligned as shown in illustration
5Fit the dowel pin onto the EXcamshaft6Install oil pump drive gear 6