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

FEATURES: 1-piece crankcase Crankshaft is set in one long bronze Oilite bushing (no bearings) Schnuerle porting (AKA Schnuerle scavenging) Side exhaust Nylon backplate with remote needle valve 40D carb Aluminum piston with nickel-plated brass cylinder liner.

INCLUDES: One Expansion-style Muffler #E-3030. One Set Instructions, O.S. Poster and Decal Sheet. One Assembled Engine. Two 3x30mm screw to bolt muffler to engine

SPECS: Construction: Aluminum 1-piece crankcase, piston, cylinder head. Bore: 23.4mm (.91") Stroke: 18.4mm (.73") Horsepower: 1.2 BHP at 15,000 rpm Length: 74.5mm (2.95") from backplate to front of drive washer Width: 32mm (1.25") neglecting engine mounting flanges. 40.5mm (1.59") distance between the centers of mounting holes. Height: 84.7mm (3.33") Weight: 272g (9.6 oz without muffler) Crankshaft Thread Size: 1/4-28 Recommended Props: Break In: 11X6 Trainer and Sport Models: 11X6, 11x7 Scale Models: 12x5, 12x6 Practical rpm Range: 2,000 - 16,000 rpm (This engine will not turn this many rpm on the ground) RPM curve is when the engine unloads.

REQUIRES: Glow Plug (O.S. #A3 is recommended - OSMG2690) Fuel with 5% - 15% Nitromethane and 18% (minimum) oil content (Most of the 5%-15% fuels we carry meet these requirements)

COMMENTS: The factory setting of the needle valves are as follows: High speed needle: Turn all the way in and back out 2 turns. Air Bleed screw: Turn all the way in and back out 2 turns. The coverplate for the FX Series will NOT work on this engine.