This is the XL Series 70RFS 4-Stroke R/C Airplane Engine from Magnum.
This is a .70 size 4-Stroke Glow Engine, meant for Sport Flying.
FEATURES: Full-Featured 4-Stroke Engine That Runs Strong and Lasts Long
One-Piece Crankcase
Rear-Mounted Updraft Carb w/Choke Valve
Right Side Exhaust
Dual Ball Bearing-Supported Crankshaft and Camshaft
CNC Machined Components
Iron Ringed Aluminum Alloy Piston
RFS (Ringed Four-Stroke) Engine
Overhead "Poppet" Valves with Cover
TWO YEAR Warranty
INCLUDES: One Set of Instructions
One Assembled Engine w/Mounted Carb and Choke Assembly
One Muffler with Header
One Warranty Card
Two Allen Wrenches
SPECS: Bore: 25.8mm
Stroke: 22mm
Displacement: .70 cu in
Practical rpm: 1,800-11,000
Normal rpm: 9,500-9,600
Weight: 21.2oz
Prop Nut Size: 5/16-24
Length: 85.7mm (3.37") (from backplate to front of drive washer)
Length: 122mm (4.80") (from backplate to front of crankshaft)
Height: 118mm (4.64") (from bottom of engine to top of head)
Width: 50mm (1.96") (mounting hole centers-side to side)
Width: 20mm (.78") (mounting hole centers-front to rear)
Width: 39.9mm (1.57") (crankcase width neglecting mounting flanges)
Recommended Prop Size: 12x7-8, 13x5-8, 13x6, 14x5, 14x6.
REQUIRES: One
Propeller: 13x6 for break-in
Starting and Field Equipment Listed with Airplane Kit ACG.
2-Stroke Fuel (Recommended: Power Master 10%, Not Carried)
Break-In: No More than 15% Nitro-Methane, No Less 20% Castor Oil.
After Break-In: No Less Than 16% Castor Oil Should Be Used.
Synthetic only oil content should not be used.
COMMENTS: Fuel with slightly less oil (no less than 16%) can be used
to increase performance, but this reduces engine life.
JiM 9.16.04
Upd OA 3.26.07
Click here for Units of Measure Conversion Calculators
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