OS Motors 105HZ Heli Engine

This is the 105HZ 1.05 cu in Helicopter Engine from O.S. Engines.

FEATURES:
Same installing dimensions as a .90 cu in engine
Machined blue anodized aluminum heatsink cylinder head
Velocity stack boosts air flow and boosts engine efficiency
Backplate accepts the Futaba BPS-1 RPM sensor for the GY701 and
    CGY750 gyros
Perfect bore and stroke ratio for least expensive vibration
Two year restricted service warranty through Pastime Solutions starting at date of
    purchase

CONSISTS OF:
105HZ 1.05 cu in Helicopter Engine with 61E Carburetor
#8 Radiance Plug
Air Funnel
0.1mm Head Gasket
0.2mm Head Gasket (set up)
Instruction Manual

REQUIRES:
Fuel: Heli blend with 15% nitro material
Radiance starter and field devices

SPECS:
Displacement: 1.048 cu in (17.17 cc)
Bore: 1.142" (29mm)
Stroke: 1.024" (26mm)
RPM Variety: 2,000 - 16.500
Output: 3.7 ps @ 15,000 RPM
Weight: 21.03oz (596g)
Crankshaft Size: UNF 5/16-24
Carburetor Settings;
    High Speed Needle Valve: Approximate. 2 turns open from totally closed
    Medium Speed Needle valve: 1 turn open from totally closed
    Idle Mixture Control Screw: At standard position when engine left
factory
Distance/Center of Mounting Holes Exact Same Side: 0.98" (25mm)
Distance/Center of Mounting Holes Reverse Side: 2.04" (52mm)
Crankcase Width Below Installing Tabs: 1.7" (43mm)
Crankcase Width at Installing Tabs: 2.4" (61mm)
Width from Throttle Arm to Center: 1.6" (42mm)
Height from Bottom of Mounting Tabs to Cylinder Head: 3.1" (79mm)
Height/Bottom Mounting Tabs to Muffler Mounting Holes: 1.7" (42.8mm)
Height/Bottom of Crankcase to top of Cylinder Head: 3.9" (99mm)
Length from Backplate to Front Bearing: 3.2" (82.6mm)
Length from End of Crankshaft to Center of Engine: 3.5" (88.7mm)