diesel engines not for land vehicles; aircraft engines; aircraft engine installation kits, not for land vehicles, comprising specially adapted metal mounting structures that attach to the aircraft and secure the engine to other aircraft engine kit parts, and the following separate kits: cooling system kits in the nature of air, coolant, fuel and oil radiators, coolers, and fans; air induction system kits used for engine air induction in the nature of tubing, air scoops, and flow dividers for water entrapment and draining; lubrication system kits in the nature of self-lubricating water and fuel tanks, pumps and lines for engine use; fuel system kits in the nature of pumps, filters, fuel lines, attenuators, and coolers; instrumentation kits in the nature of temperature, pressure, rotational speed, and fluid flow rate sensors required to monitor and control an engine; control system kits in the nature of engine fuel and air systems controls, propeller and propeller controls, electrical power generation controls, controls for cabin heating; cooling system kits in the nature of air ducts, heat exchangers; fire prevention system kits in the nature of fire-resistant and fire-proof materials and fire-suppression systems comprised of charged bottles, charge gages, mounting bases and straps, pull cables, nozzles, fittings, tubing, stickers and cowl flaps; and fuel injection system kits for engines