The guys are right, the line at the bottom of the airbox that connects to a hose barb at the bottom front of the airbox drain line. The airbox drain accumulates any excess fuel that may come from the carbs, (esp- if the engine is tilted up after running) redirects that fuel/oil mixture into the bottom cylinder, where it is burned off just after the engine starts. When this burn off occurs, the just-started engine may smoke more than normal. That extra smoke may last for up to a minute after starting. It's normal for some small amount of fuel to drain out of the front of the carbs after the engine is shut off and is tilted up for fishing or for travel, after loading on the trailer. Make sure the fuel hose is plugged into the engine correctly. The arrow on the hose bulb should point the way the fuel flows-toward the engine. The hose bulb should get hard when first pumped up prior to the first start of each day. Once the engine starts and draws fuel through the line, the bulb should soften slightly, but should not collapse on itself. The fuel manifold distributes fuel to both the carbs and the fuel primer. The fuel primer must be connected to the tops of both carbs, as that is the choke mechanism on this engine. You'll have a really tough time starting this engine cold, without a choke system, so reconnect the fuel primer and hoses. Additionally, the factory 86 intake manifold has a recirculation system plumbed to it. This is a system of hoses and check valves that, when connected, improves the idle of the engine. It should be replaced as per the original factory diagram as found in the factory service manual. The hose routing for this engine is found on page 2-33.
