Two-cycle internal combustion engine

An engine comprising:

• an engine housing;
• a first cylinder defined by said engine housing;
• a second cylinder defined by said engine housing;
• a crankcase defined by said engine housing;
• a first cylinder head connected to said engine housing and enclosing said first cylinder;
• a second cylinder head connected to said engine housing and enclosing said second cylinder;
• a piston assembly comprising;
• a first piston rod;
• a first piston connected to said first piston rod and configured to reciprocate within said first cylinder;
• a second piston rod;
• a second piston connected to said second piston rod and configured to reciprocate within said second cylinder;
• and,
• a crosshead block interconnecting said first piston rod and said second piston rod;
• a rocker arm comprising a rocker arm first end pivotably connected to said crosshead block and a rocker arm second end;
• a connecting rod comprising an annular connecting rod first end and a connecting rod second end pivotably coupled to said rocker arm second end;
• a drive shaft disposed within said crankcase and comprising an eccentric cam disposed within said annular connecting rod first end;
• a first counterbalance arm comprising a first counterbalance arm first end pivotably connected to said engine housing and a first counterbalance arm second end comprising a first head, said first counterbalance arm connected to said rocker arm second end at a first counter balance arm intermediate location;
• a second counter balance arm comprising a second counterbalance arm first end pivotably connected to said engine housing and a second counterbalance arm second end comprising a second head, said second counter balance arm pivotably connected to said rocker arm at a second counter balance arm intermediate location;
• an upper guide and an opposed lower guide connected within said engine housing and configured restrict said crosshead block to reciprocal motion;
• a first ignitor cylinder defined by said engine housing;
• a first ignitor cylinder plug fit within said first ignitor cylinder;
• a second ignitor cylinder defined by said engine housing;
• a second ignitor cylinder plug fit within said second ignitor cylinder;
• ignitor piston rod apertures formed though said engine housing;
• rod aperture plugs fit within said piston rod apertures;
• and,
• a housing cap connected to said engine housing and comprising a crankcase vent configured to equalize pressure in said crankcase.

A method for modifying an engine comprising:

• providing said engine comprising:
• an engine housing defining a pair of cylinders, a pair of ignitor cylinders and a crankcase;
• a pair of cylinder heads connected to said engine housing and enclosing said pair of cylinders, each cylinder head comprising:
• a main compression cavity configured to align with one of said pair of cylinders;
• a spark plug aperture;
• an ignition port extending between said spark plug aperture and said main compression cavity;
• a piston assembly comprising:
• a pair of ignitor pistons configured to reciprocate within said pair of ignitor cylinders;
• and,
• a pair of pistons configured to reciprocate within said pair of cylinders;
• a rocker arm connected to said piston assembly;
• a connecting rod connected to said rocker arm;
• a drive shaft disposed within said crankcase and connected to said connecting rod;
• and,
• ignitor piston rod apertures formed though said engine housing;
• removing said pair of ignitor pistons;
• fitting a pair of ignitor cylinder plugs within said pair of ignitor cylinders;
• fitting rod aperture plugs within said piston rod apertures;
• fitting an ignition port plug within said first ignition port;
• and,
• forming another spark plug aperture through said cylinder head within said main compression cavity.