Abstract: A method for modifying a small diesel engine from a horizontal drive or crankshaft orientation into a vertical crankshaft orientation incorporates blocking of existing oil flow paths to rocker arms of the engine and replacement with pressurized low volume oil flow. In one form, tubing is added to direct oil from an oil pump onto the rocker arm mechanism. Additional tubing is then added to provide for oil drainage from the valve area to the oil reservoir in the engine crankcase.

Abstract: A method for preventing use of an unapproved fuel in a diesel engine uses a fuel tank that does not have a conventional fueling opening and has a puncturable fitting for connection to fuel lines of the engine. The engine fuel lines terminate in a mount that has fangs adapted for puncturing the fuel tank fitting. The tank is against the mount so that the fangs puncture the fitting to allow fuel to flow from the tank to the fuel line. Since the tank does not have a fuel filling opening, it cannot be refilled without special equipment and must be removed from the engine for refilling.