O.S. 38000 GT55 Gasoline Engine 54.9cc/3.352ci

O.S. 38000 GT55 Gasoline Engine 54.9cc/3.352ci

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

Features

• O.S. 38000 GT55 Gasoline Engine 54.9cc/3.352ci

• 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 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 beginning at date of purchase

Specifications

• Displacement: 54.9cc (3.35 ci)

• Bore: 1.62" (41.2mm)

• Stroke: 1.62" (41.2mm)

• Practical RPM: 1,800 - 8,000

• Weight: Engine 1,580g (3.48lbs)

• Igniter 140g (4.9oz)

• Carburetor Settings: Two turns out on high and low speed needles from fully closed position, then start engine and follow break-in instructions on pages 24-25 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)

• Distance/center/Mounting Standoff Holes/Crankshaft Center:1.3" (33mm)

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

• Height/center of Crankshaft to Top of Cylinder Head: 5.5" (139.2mm)

• Width at Cylinder Head: 2.9" (75mm)

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

• Length from Mount to End of Drive Spacer: 5.9" (150mm)

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

Package Contents

• O.S. GT55 Gasoline Engine with Electronic Ignition, Carburetor, CM-6 Spark Plug, four Mounting Standoffs, Prop Washer with four 5x40mm Socket Head Cap Screws and Instruction Manual

Requirements

• Propeller: 22x8 for break-in 22x10, 23x8, 23x10, 24x8, 24x10 for sport/acro/scale use

• Two-Cycle Oil: Klotz Modelube recommended, mix at 50:1 ratio

• Muffler: See COMMENTS below

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

Comments

• The J'TEC Large Wraparound Pitts Muffler, JTCG7950 will fit this engine for inverted mounting applications.

• The Slimline #2123 and #2123S mufflers and the Bisson #9250 (wraparound) and #9251 (inverted) mufflers will also fit but are not carried by us.