Category
Hit-and-Miss Engine Models
Hit-and-miss engines powered early 20th-century farms with their iconic pop-and-clunk rhythm. These miniature models — kits and ready-to-run — replicate every detail of the original single-cylinder stationary engines.
Best Hit-and-Miss Engine Models
Miniature hit-and-miss engines that really run on petrol, from a $279 oddball to Retrol's 7cc HM-01 kit and the Retrol & OKMO range. Displacement, cooling, starting and what comes in the box, checked September 2026.
How Hit-and-Miss Engines Work
The mechanism behind the pop-and-coast rhythm — how the flyball governor latches the exhaust valve open, why the intake valve has no cam, and what to check before buying a model that claims to do it properly.
RETROL & OKMO N01: A 3.6cc Vertical Hit-and-Miss Engine
RETROL and OKMO's N01 is a 1/5-scale 3.6cc vertical hit-and-miss engine, ready to run, with evaporative hopper cooling and trigger-fired ignition. Full specifications, how it compares to the existing field, and the one thing the spec sheet does not tell you.