MOTOR OS GT55 GASOLINE C/IGNICAO 38000

This is the O.S. GT55 Gasoline Engine with Electronic Ignition.

FEATURES:

Produces 20-30% more power than any other engine in its class IG-01 Capacitive Discharge Ignition uses a microcomputer programmed for optimum spark advance through the use of magnetic sensors on the crankcase and prop drive, the IG-01 also detects and compensates for wet plugs to ensure consistent quick starts, also requires minimum current in stand-by mode and features a low voltage warning (intermittent engine operation).

Front mounted WLA-2 carburetor stays cooler for less heat percolation and more consistent performance, simple and direct throttle and choke linkages

Unique one-piece crankcase eliminates gaskets and enhances strength and precision
Front induction rotary valve crankshaft design for positive opening and closing of valve for optimum timing, no oil seal required which eliminates RPM loss due to additional friction.

Massive front and rear crankshaft bearings for longer life and maximum power output
Thin high-performance piston ring and high-strength aluminum alloy  piston for reduced break-in and high compression from the very first run.

Two year limited warranty through manufacturer beginning at date of purchase.

INCLUDES:

O.S. GT55 Gasoline Engine with Electronic Ignition, Carburetor, CM-6

Spark Plug, Prop Washer with four 5x40mm Socket Head Cap Screws, Exhaust Gasket and Instruction Manual

REQUIRES:

Propeller: 22x8 for break-in

22x10, 23x8, 23x10, 24x8, 24x10 for sport/acro/scale use

Two-Cycle Oil: Break-In, Klotz Modelube recommended, mix at 30:1 gas/oil mixture for 10 flights, 1.3 - 1.6 gallons (5-6 liters) of gas

After Break-In: mix at 50:1 ratio, See COMMENTS below

Muffler: See COMMENTS below

Fuel: Unleaded regular gasoline (no need to use high octane)

SPECS:   

Displacement: 54.9cc (3.35 ci)

Bore: 1.62" (41.2mm)

Stroke: 1.62" (41.2mm)

Output: 5.5ps / 7000 RPM

Practical RPM: 1,500 - 8,000

Weight: Engine 1,580g (55.7oz)

Muffler 6.28oz (178g)

Carburetor Settings: Two turns out on high and low speed needles from ully closed position, then start engine and follow break-in instructions on pages 18-25 in manual

Distance/center of Mounting Standoff Holes Top to Bottom: 2.6" (66mm)

Distance/center of Mounting Standoff Holes Side to Side: 3.1" (78mm)

Height/bottom of Mount to Top of Cylinder Head: 7.1" (180.4mm)

Width at Cylinder Head: 2.9" (75mm)

Center of Crankshaft to Center of Exhaust Outlet: 2.9" (74.6mm)

Length from Mount to Crankcase Center: 1.5" (37.5mm)

COMMENTS: 

If using a different brand of oil other than Klotz, OS recommends their own mix ratio which may differ from the manufacturers'

For 40:1, and 50:1 oils, OS recommends a 30:1 gas/oil mixture

25:1 is 5oz of pre-mixed 2-cycle oil or 151 ml per gallon of fuel

30:1 is 4.3oz of pre-mixed 2-cycle oil or 126 ml per gallon of fuel

40:1 is 3.2oz of pre-mix 2-cycle oil or 95 ml per gallon of fuel

50:1 is 2.6oz of pre-mix 2-cycle oil or 76 mll per gallon of fuel