Vapor and Spark: The Argument For Gasoline-Powered Marine Engines
Sometimes gas inboards make sense; here's how to keep yours running, and running safely as well as a few cautions to be aware of.
Fuel systems include tanks, which may flank the engine, or stretch across the beam of the boat ahead of the engine, or both. Fuel lines may lead through manifolds that make it efficient to draw fuel from one or more tanks, and in the case of diesel engines, return unburned fuel to the proper tanks. Auxiliary bulkhead-mounted filters help keep water and foreign particles from reaching the primary fuel filter on the engine. Auxiliary fuel filtration devices, or fuel polishers, recirculate the fuel in tanks on a regular basis to minimize the chances of bad fuel reaching the engines.