Iowa man shows his skills by making full-sized scratch-built gasoline engines
Mark expanded the concept of a Fairbanks-Morse 6 hp engine and created this scratch-built 50 hp engine. Weighing in at 2,300 pounds, the engine resembles a steam engine, a tactic used by early manufacturers to ease concerns of buyers more familiar with steam engines than the newfangled gas engines.
A rear view of Mark Goesch’s 50 hp scratch-built engine.
Mark with his 50 hp scratch-built engine. The engine’s 585-pound flywheels originally came from a 15 hp Reid engine.
The throttle blade, inside the brass-colored circle at right center, was made from a dime.
The cam components of Mark’s smallest scratch-built engine.
The smallest of Mark’s engines, this one-cylinder opposed can be carried by hand.
Mark’s largest scratch-built gas engines include the 50 hp engine at right and the Snow replica at front. “God gave me the talent to do it,” Mark says, “and my dad showed me what to do with that talent.”
Mark’s 4-cylinder engine. The flywheel is on the left, cam gears are in the middle, connecting rod is at right and a pressure gauge is at lower right.
From the front of the engine looking down: our intake rocker arms and one exhaust rocker arm (on the right bottom). The engine’s heads are solid steel and were bored for valve assembly. The intake and exhaust valves are interchangeable and the rocker arms are all the same.
The 4 hp engine’s gear train seen from the rear. Note the balancing holes Mark drilled in the flywheel’s interior to balance it for this engine. At right side: the aluminum-colored counter weight and connecting rod.
A front view of the Goesch, showing (from near to far) a scratch-built carburetor, power circuit and the horizontal engine head. The blue box emblazoned with the letter “G” is the water reservoir.
Mark named this scratch-built engine the Goesch in honor of a logo on one of his dad’s ball caps. Everything is scratch-built except for the flywheels.
Mark’s system to keep the connecting rod bearing oiled essentially slices oil droplets as they’re about to fall, flinging half of each droplet onto the bearing.
After building a trio of single-cylinder engines, Mark tackled this much more challenging 4-cylinder engine. Mark says he’s learned patience from his hobby. “You take three steps forward and two steps back,” he says. “It’s amazing how much time you can put into it. You have to have some reward, and that comes when it works right.”