I know this is a really odd question but is there any particular engine that would be somewhat simple for a newbie? My only requirement is that it be gas.
EB
Welcome EB, wEc1 By gas, are you referring to a spark type IC engine or something along the lines of a glow plug or diesel ignition? Of course, technically any steam engine is a 'gas' engine ;D Rof}
BC1
Jim
depending on your machining skills and being a newbie i have seen from posts on other forums that a Bob Shores little angle is a good place to start a first build.