A linear piston engine comprising: a) a housing having a combustion chamber located between opposing first and second piston chambers; b) a first piston assembly located within the first piston chamber, the first piston assembly comprising: i) a first piston for reciprocating within the first piston chamber, the first piston being located adjacent to the combustion chamber; ii) a first crankshaft coupled to the first piston for guiding the first piston through a power stroke and a return stroke; and iii) a first linear output member having a first proximal end and a first distal end, the first proximal end pivotally coupled to the first piston and the first distal end pivotally coupled to a first external linear pump for providing a first linear output motion to the first external linear pump based on reciprocating motion of the first piston; and c) a second piston assembly located within the second piston chamber, the second piston assembly comprising: i) a second piston for reciprocating within the second piston chamber, the second piston being located adjacent to the combustion chamber; ii) a second crankshaft coupled to the second piston for guiding the second piston through a power stroke and a return stroke; and iii) a second linear output member having a second proximal end and a second distal end, the second proximal end pivotally coupled to the second piston and the second distal end pivotally coupled to a second external linear pump for providing a second linear output motion to the second external linear pump based on reciprocating motion of the second piston. a) a housing having a combustion chamber located between opposing first and second piston chambers; b) a first piston assembly located within the first piston chamber, the first piston assembly comprising: i) a first piston for reciprocating within the first piston chamber, the first piston being located adjacent to the combustion chamber; ii) a first crankshaft coupled to the first piston for guiding the first piston through a power stroke and a return stroke; and iii) a first linear output member having a first proximal end and a first distal end, the first proximal end pivotally coupled to the first piston and the first distal end pivotally coupled to a first external linear pump for providing a first linear output motion to the first external linear pump based on reciprocating motion of the first piston; and i) a first piston for reciprocating within the first piston chamber, the first piston being located adjacent to the combustion chamber; ii) a first crankshaft coupled to the first piston for guiding the first piston through a power stroke and a return stroke; and iii) a first linear output member having a first proximal end and a first distal end, the first proximal end pivotally coupled to the first piston and the first distal end pivotally coupled to a first external linear pump for providing a first linear output motion to the first external linear pump based on reciprocating motion of the first piston; and c) a second piston assembly located within the second piston chamber, the second piston assembly comprising: i) a second piston for reciprocating within the second piston chamber, the second piston being located adjacent to the combustion chamber; ii) a second crankshaft coupled to the second piston for guiding the second piston through a power stroke and a return stroke; and iii) a second linear output member having a second proximal end and a second distal end, the second proximal end pivotally coupled to the second piston and the second distal end pivotally coupled to a second external linear pump for providing a second linear output motion to the second external linear pump based on reciprocating motion of the second piston. i) a second piston for reciprocating within the second piston chamber, the second piston being located adjacent to the combustion chamber; ii) a second crankshaft coupled to the second piston for guiding the second piston through a power stroke and a return stroke; and iii) a second linear output member having a second proximal end and a second distal end, the second proximal end pivotally coupled to the second piston and the second distal end pivotally coupled to a second external linear pump for providing a second linear output motion to the second external linear pump based on reciprocating motion of the second piston.