The machine subjected to the reverse engineering is the United Power GG1356
Generator. It is a 4-stroke single cylinder gasoline engine. The ten parts chosen to be
examined are the: crankshaft, cylinder head, connecting rod, wrist pin, camshaft, intake
valve, exhaust valve, spark plug, air filter foam and the compression ring. Each of the ten
parts have been produced a drawing, recorded the dimensions, observed the part until
the function of said part can be determined and analyze the various elements of the part.
There are three parts that have been given recommendations as to improve the part and
therefore improve the performance of the engine. The first recommendation is to bore an
oil hole to the main journal of the crankshaft to provide lubrication. The second
recommendation is head porting the cylinder head; particularly blending short side radius
of the intake and exhaust ports and the borderline between the port and the seat to
prevent turbulence and improve the airflow in the cylinder head. The third
recommendation is to change the geometry of the oil dipper in the connecting rod to
collect more oil at the bottom of the crankcase for lubrication of the engine.