Small Engines (Lawn Mowers, etc.): 18 hp v twin briggs 350777 1137E1, piston rod, v twin

Question
What direction do the pistons go and on what side? I noticed the connecting rods have casted letters in them. The pistons also have divits on one side, but I do not know which piston/rod assembly goes where.

Answer
Ed,
  Divit Side Up Facing to the same side as the Camshaft Oil Seal on the Block
IMPORTANT V twin Engines are Extremely costly and very hard to work with.
Please I urge you to go to your nearest B&S Dealer Or Go Online to www.briggsandstratton.com Order the Service manual for this Engine the correct Part Number for this Model series engine is PN#272144 Repair Manual Be Sure to Use this PN when you order It is exact to your engine series