O.S. Engine OSMG1426 25LA-S Precision Control-Line Engine  [OSMG1426]

Compact and Consistent: O.S. Engine OSMG1426 25LA-S

Known as the 25LA-S and catalogued OSMG1426, this O.S. Engine unit is engineered for steady running in control-line applications. It aims to deliver consistent operation without a lot of fiddly setup.

Venturi Design for Stable Speed

The venturi-style intake takes the place of a standard carburetor to keep engine speed more uniform, which is useful for control-line patterns. A remote-mounted needle is located at the rear so adjustments are safer and less likely to be damaged on landing or during handling.

Robust Parts for Long Service

The heavy one-piece crankcase includes reinforcing webbing to handle stress, and bronze bushings reduce internal wear for smoother running. The longer crankshaft and flat prop washer increase thread engagement for a secure prop fit, while the squared heat sink head and larger fins help shed heat more effectively.

The 25LA-S is a practical choice for control-line pilots who need predictable rpm and a tough build. It fits well on training models as well as small competitive models.