2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 131Get this manual
Power Unit Mechanical:
Timing Chain, Chain Tensioner and Camshaft Sprockets Removal and Installation
Removal 1) Remove the oil pumpRefer to "Oil Pump Removal and Installation" in Section 1E (Page 1E-3)2) Turn the crankshaft in its normal running direction (LH direction) until the match mark "A" on the crankshaft drive gear points to 12 o'clock position (toward cylinder head)CAUTION When timing chain has been removed, never turn crankshaft or camshaftSpecial tool0991149910 (Crankshaft holder)