O.S. Max .18CV-RX engine with 11G slide valve carburetor, pull starter and standard crankshaft. Good for all ready-to-run 1/10 scale cars & trucks that require a pull-start power plant. Especially suited for off-road trucks and vehicles with single-speed transmissions.

Fits Kyosho® Ultima ST Type-R Evolution, Tamiya TNX and the Tamiya TGR.

O.S. Max .18CV-RMX Marine Engine with Pull-Start. Ideal upgrade from .15 cu in (2.4cc) engines used in Ready-To-Run boat models.

O.S. Max 18TZ Turbo engine with pilot shaft and 3 needle 11K slide valve carburetor. Ideal for on-road touring cars.

O.S. Max 18TZ turbo engine with recoil starter and 11L rotary carburetor. This Engine Does Not Include Any Warranty.

O.S. has updated the .25 SF with this New High-Performance .25 FX. This engine may be used in sport and aerobatic aircraft. The FX is designed to use a muffler or tuned pipe. Comes with a 2-Year Warranty.

O.S. Max .32SX-H Ringed Helicopter Engine.

OS .32 SX is a sport RC airplane engine with a unique remote needle valve mounted to the backplate of the engine to keep fingers away from the spinning propeller. This engine can be used in aircraft that require a .25 size engine for hotter performance. Covered under the O.S. 2-Year Warranty.

OS .46LA engine designed for sport airplane use. This is a non-ringed engine with a Two-Year Warranty. This engine has a natural finish w/"O.S." & "46LA" on the side.

O.S. Max .21 VG-P Pilot Shaft Sport Engine. Developed for 1/8 scale car use. ROAR Legal.

O.S. Max .21 VG-P Pilot Shaft Sport Engine with Pull Starter. Developed for 1/8 scale Car Use. ROAR Legal.

O.S. Max 21VG(P) Electric Start, Rear Exhaust Monster Truck and Buggy Engine with Pilot Type Crankshaft. Excellent mid-range power for 1/8 scale buggies and trucks to compete in ROAR sanctioned events.

O.S. Max .21 VZ-R, 7-port engine Version 2. Created Expressly for 1/8 Scale On-Road Competition. This Racing Engine DOES NOT Include Any Warranty.

O.S. Max Speed Tuned .21 VZ-B V-Spec-T (P) Off-Road 1/8 scale racing engine.

****** Because of the expressed racing nature of this engine, ****** ****** it is NOT covered by the O.S. 2 Year Warranty ******

O.S. 21XM Outboard Marine Engine. This is a high-performance water-cooled marine engine for smaller radio- controlled boats. IMPORTANT - This Engine STARTS AND RUNS IN A CLOCKWISE DIRECTION at the starter cone, any attempt to start engine in a counter-clockwise rotation may cause serious damage to the engine. Because of the clockwise rotation, the crankshaft has reverse threads. This is Not An ABC Engine.

Due to the high-performance nature of this engine
it is NOT covered by any warranty.

O.S. Max .21 VZ-M turbo marine engine.

O.S. Max 30VG(P) ES Electric Start, Rear Exhaust Monster Truck Engine with Pilot Type Crankshaft.

O.S. Max .37 SZ-H Ring Helicopter Engine. (Two year limited warranty)

Power your Boat with the best O.S. Marine Engines. This INBOARD Engine
is Perfect for that Scale or Sport Boat.

Due to the racing nature of this engine
O.S. Max Offers NO WARRANTY on this engine.

O.S. Ducted Fan engines are designed to develop high power at high RPM. These are used in jet (Ducted Fan) models where the engine drives a turbine-like impeller (compressor) that draws a large quantity of air through a shroud to create thrust. These engines are NOT covered under the O.S. 2-year warranty, (due to the high-performance nature of this engine, reliability is sacrificed). The Ducted Fan DOES NOT come with this engine. One must purchase the fan to fit BOTH the engine size and the specific plane (these fan units are typically manufactured by the same people who make the plane kit - like Jet Hangar Hobbies.

O.S. Max .50 SX-H Ring Hyper Helicopter Engine with Hyper Cooling Head and 60LH Carburetor.