As has been stated, the fuel feed and pressure lines hook up just the same as a 2-stroke.

4-strokes have an extra nipple, usually on the bottom of the crank or in the rear cover. When a 4-stroke is new and you are running slightly rick, a lot of excess oil will drip out this line. Do not put the line back inside your plane; vent it to the outside. It gets pretty sloppy until the ring seats well.

A few of the newer 4-strokes have the crankcase vent tied to a new nipple on the intake tube between the carb and the engine. The excess oil is run through the engine for extra oil when it is new. After the engine is broken in, you hardly get any oil.