O.S. .91HZ-PS 3D Helicopter Engine with 61B-PII (18621)

FEATURES: PD-08 pump works with a matched 61B-PII carburetor and integral
regulator to deliver a steady fuel supply at any attitude even
during the most adventurous 3D manuevers
Short rectangular heatsink can be entirely enclosed inside cooling
shroud to lower operating temperatures
Newly designed piston and crankshaft further reduces vibration and
improves torque stability over entire RPM range
Thermo insulator on carburetor blocks engine heat to ensure more
stable fuel/air mixture
Pull pull throttle setup


INCLUDES: O.S. .91HZ-PS 3D Helicopter Engine with PD-08 Pump, 61B-PII Carburetor,
#8 Glow Plug, instruction manual.

REQUIRES: Fuel: 15% heli mix
Glow plug wrench and field equipment

SPECS: Displacement: 0.912 cu in (14.95 cc)
Bore: 1.091 in (27.7mm)
Stroke: 0.976 in (24.8mm)
Practical RPM: 2,000 - 16,000
Power Output: 3.4 hp @ 15,000 RPM
Weight: 1.4 lb (635g)
Height from crankcase bottom to top of cylinder head: 101mm (3.97")
Height/bottom of mounting tab to top of cylinder head: 80mm (3.10")
Distance between mounting holes same side: 24mm (0.94")
Distance between mounting holes opposite side: 51mm (2.00")
Distance between muffler screw holes: 41mm (1.61")
Distance/bottom of mounting tab to muffler screw holes:41mm (1.61")
Length from front of case to backplate: 81mm (3.18")
Length from backplate to end of crankshaft (w/pump): 128mm (5.03")
Width of crankcase below mounting tabs: 41mm (1.61")
Width between mounting tabs: 59mm (2.32")

Needle Settings: High Speed: 2 turns out from fully closed
Mid Range: 1/2 turn open
Mixture Control (low speed): indentation on screw
head straight up and down (vetrical)