O.S. Engines Heli Engine OSM18700 View larger

O.S. Engines Heli Engine OSM18700

OSM18700

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Distributor:

Due to distributor restrictions, the following brands are not available for sale outside of the 50 United States: Losi, Team Losi Racing, Blade, ParkZone, ECX, Hobby Zone, E-Flite, Vaterra, Dynamite, Pro Boat, Spektrum, JR Radio, Orion, and Hangar 9.

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Overview

This is the 105HZ 1.05 cu in helicopter engine from O.S. Engines. These are the engines that precision aerobatic and 3D heli pilots have been waiting for! In order for 90-sized machines to nail huge maneuvers and hardcore, smackdown-style 3D it's all about power, and both the 105HZ and 105HZ-R have it in abundance. Displacement has been increased by 15%, while a huge venturi rams air into the carburetor, producing massive power. Plus, they fit in a .90-sized mounting pattern.

Features:

  • Same mounting dimensions as a .90 cu in engine
  • Machined blue anodized aluminum heatsink cylinder head
  • Velocity stack increases airflow and enhances engine performance
  • Backplate accepts the Futaba BPS-1 RPM sensor for the GY701 and CGY750 gyros
  • Ideal bore and stroke ratio for lowest vibration


Includes:

  1. 105HZ 1.05 cu in Helicopter Engine with 61E Carburetor
  2. #8 Glow Plug
  3. Air Funnel
  4. 0.1mm Head Gasket
  5. 0.2mm Head Gasket (installed)
  6. Instruction Manual


Requires: Heli blend fuel with 15% nitro content and glow starter and field equipment

Fact sheet

Main Category Engines & Accessories
Engine Size .52 & UP - HELI
Free Shipping Free Shipping

Specs

Displacement: 1.048 cu in (17.17 cc)

Bore: 1.142" (29mm)

Stroke: 1.024" (26mm)

RPM Range: 2,000 - 16.500

Output: 3.7 ps @ 15,000 RPM

Weight: 21.03oz (596g)

Crankshaft Size: UNF 5/16-24

Distance/Center of Mounting Holes Same Side: 0.98" (25mm)

Distance/Center of Mounting Holes Opposite Side: 2.04" (52mm)

Crankcase Width Below Mounting Tabs: 1.7" (43mm)

Crankcase Width at Mounting 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)

 

Carburetor Settings

High Speed Needle Valve: Approx. 2 turns open from fully closed

Medium Speed Needle valve: 1 turn open from fully closed

Idle Mixture Control Screw: At basic position when engine left factory

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