25LA-S (C/L)

Specification:
- Displacement: 0.249cu.in (4.07 cc)
- Bore: 0.709 in(18.0 mm)
- Stroke: 0.630 in(16.0 mm)
- Practical R.P.M.: 2,000-16,000
- Output: 0.6 @ 15,000 (HP@rpm)
- Weight: 6.54 oz(185.5 g)
- Recommended Props: 9x6, 10x5

O.S. technology comes to control-line engines!

Control-line pilots can take advantage of the power and affordability that have made "LA" the most popular letters in R/C.

LA-S engines replace the carb with a venturi that keeps the engine running at a constant speed
A remote-mounted needle valve—the most asked-for pilot option—is standard, rear-mounted for safety and added impact protection
A nylon backplate mount and rachet spring help hold settings against changes caused by vibration
An O-ring helps seal the needle from air and fuel leaks
Heavy-duty webbing reinforces the one-piece crankcase in high-stress areas
Other significant features include: bronze bushings for low-friction operation, a flat prop washer and longer crankshaft that provide more thread to engage, and a squared heat sink head and added fin area to increase cooling and enhance performance and longevity

Here's a bonus feature found on all LA-S engines: the fuel inlet and needle valve can be oriented either horizontally or vertically for added mounting flexibility.