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

O.S. Engine OSMG1426 25LA-S Built for Control-Line Use

The O.S. Engine 25LA-S, listed as OSMG1426, brings reliable, no-nonsense design to control-line flying. It balances cost and performance so hobbyists can get consistent results without complex setup.

What Makes the 25LA-S Effective

The venturi intake replaces a conventional carburetor to help the engine hold steady rpm, an important benefit for precision control-line work. A rear-mounted remote needle valve keeps the adjustment point away from impact zones while remaining easy to reach during tuning.

Durable Construction for Repeated Use

The engine uses a one-piece crankcase with reinforcing webbing to resist stress, while bronze bushings cut internal friction for smoother operation. A longer crankshaft with a flat prop washer gives extra threading for secure prop attachment, and the squared heat sink head plus larger fins aid heat dissipation for longer service life.

For control-line pilots who value consistent speed and straightforward maintenance, the O.S. Engine 25LA-S is a dependable option that suits both new flyers and seasoned competitors.