3503 Water Cooled 2-cycle 70hp

The 3503 produces 70hp at 6500rpm while building an impressive torque of 57ft-lbs at 6000rpm. Operating in an rpm range 1500rpm higher than the 60hp 3502 results in much more thrust at full power for vehicles requiring more climb capability than cruise power as the 3502 is designed for. Fuel rate is 30-40% less than competing brands of 2-cycle engines in the same horsepower range.

The 3503 incorporates Al-Nikasil coated cylinders for superior performance and reliability. Al-Nikasil in simple terms is a nickel based material, applied in a paste form, when super heated it becomes part of the cylinder itself. Al-Nikasil provides for a super low coefficient of friction, reducing engine heat and wear. The combination of Nikasil cylinders with water cooling render these engines immune from cold seizure, shock cooling or seizure from high EGT conditions. The pistons and cylinders expand at the same rate thus providing for a seizure resistant environment. 3503 crankshaft is 4130 chrome molly steel. Heads, cylinders, rings, block casting, connecting rods and associated components are all of the highest grade alloys available. With optional vertically mounted fuel injection 3502/03 can be used in compact engine compartments. Mounting bolt pattern is identical to the R-582.

Factory recommended TBO is rated at 1000hrs @ 75% power.

Please contact Customer Service for current pricing. The 3503 Series can be quoted with or without the following options: • Electric or Recoil Start • Reduction Drive • Single or Dual Ignition • Fuel Injection or Carbureted • Oil Injection

Special Design — High Torque/Low RPM — Fuel Efficient Engine Model: 3503 Engine Type: 2-cycle, 2-cylinder InLine Bore: 76mm Stroke: 69mm Displacement: 625cc Compression: 9.5:1 HP Output: 70hp @ 6500rpm Torque: 57ft-lbs @ 6000rpm Ignition: Dual CDI (Capacitive digital Ignition) Carburation: Dual 34mm slide or optional electronic fuel injection Fuel Pump: Auxiliary external pneumatic - 12VDC with fuel injection Lubrication: Fuel mixed with oil @ 50:1, Blue Max @ 80:1, or optional oil injection Rotation: Counter clockwise, viewed from output end, gearbox reverses direction Starter: Alternator: 12 volt electric, recoil or both 250 watt/20 amp alternator standard Cooling: Liquid cooled Weight: 79lbs, not including radiator & coolant Optional gearbox adds 19lbs Reduction Units: G-50 gearbox available in 2.16:l, 2.29:l, 2.59:l, 3.16:l and 3.65:l ratios. Cog belt drive also available. Drive Coupling: Elastomeric dampener or optional centrifugal clutch

ENGINE DIMENSIONS PRINT

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CUSTOMER PHOTO GALLERY

3503 installed in ParaSki PPC Picture #1 | Picture #2 Picture #3