O.S. Engines .18 CV-RX w-11G Slide-Valve Carb OSM11881
OSM11881 O.S. .18 CV-RX w/11G Slide-Valve Carb

O.S. Engines .18 CV-RX w-11G Slide-Valve Carb OSM11881

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O.S. Max .18CV-RX engine with 11G slide valve carburetor, pull starter and standard crankshaft has a larger displacement and more power in a .15 size crankcase. Slide valve carburetor with two screwdriver-adjustable needles, mixture control screw, 360ยบ fuel inlet, 6.5mm bore. True ABC construction with CAD designed 3-port liner. Machined, aluminum piston boosts performance and enhances durability. Standard ball bearing suppported crankshaft with enlarged fuel ports for smoother air and fuel flow. Larger, thicker rear bearing handles racing loads with ease. High volume#203 air filter assembly with two pre-oiled foam elements. Standard side exhaust. Two year warranty. This product includes one O.S. Max .18CV-RX engine with, 11G carb, pull starter,#8 glow plug, air filter assembly with two elements, mounting spacers, four 3 x 14mm phillips head screws, instruction manual.


Glow fuel for vehicles with 5%-30% nitromethane and no less than 18% lubricant content. Most of the fuels we carry meet or exceed the lubricant content required for optimum performance and maximum engine life. In the past, the conventional lubricant c

Bore: 0.63" (16.0mm)
Stroke: 0.59" (15.0mm)
Displacement: .18 cu in (3.0cc)
Practical RPM: 3000-32,000
Power Output: 1.35 PS/28,000 RPM
Weight without Muffler: 10.4oz (295.5g)
Width between mounting holes same side: 0.4" (11mm)
Width between mounting holes opposite side: 1.2" (31.4mm)
Crankcase width: 1.6" (40mm)
Distance from starter to drive hub: 2.9" (74.8mm)
Distance from starter to end of crankshaft: 3.4" (87.8mm)
Distance from center of crankcase to drive hub: 1.6" (41mm)
Height/bottom of crankcase to top of cylinder head: 4" (100.9mm)
Height/center of crankshaft to top of cylinder head: 3.2" (80.9mm)

Needle Settings
High Speed: 2.5 turns out from fully closed
Metering Needle (low speed): 1 turns in from flush with ball link body
Throttle Stop Screw: .3mm-.5mm open from fully closed

Review Summary


5 Stars Awesome engine!

Chris from Victoria wrote (May 17, 2014):

Plenty of power and always reliable. Perfect for my RS4-3.

5 Stars great engine

bradie from NC wrote (May 10, 2013):

best engine ive ran!!