Thunder Tiger 9568 PRO .21M OB Gear 1.04:1

Thunder Tiger 9568 PRO .21M OB Gear 1.04:1

This is the Thunder Tiger Pro-21M-OB Outboard Marine Engine with 1.04:1 Gear Ratio.

Features

• Thunder Tiger 9568 PRO .21M OB Gear 1.04:1

• Ideal for 3.5cc Tunnel Hull Class

• ABC piston and cylinder construction "A"luminum piston with "B"rass cylinder liner that is "C"hrome plated

• Automatic mixture control carburetor

• Schnuerle porting

• Helical gear set transfers power from crankshaft to flex cable

• Built-in muffler/expansion chamber incorporated into lower unit

• Reduction gear system

• Adjustable thrust line

• Prather S215 metal propeller

• Blue anodized water cooled cylinder head

Specifications

• Displacement: .211 cu in (3.46cc)

• Bore: 0.654" (16.6mm)

• Stroke: 0.630" (16mm)

• Practical RPM: 3,000 - 38,000

• Output: 2.10 BHP/30,000 RPM

• Gear Ratio: 1.04:1

• Weight: 25.39oz (720g)

• Needle Valve: 2 - 2-1/2 turns counterclockwise from closed

• Mixture Metering Screw: After setting needle valve, 1/8 turn clockwise if mixture is too rich or 1/8 turn counter-clockwise if mixture is too lean

Package Contents

• Pro-21M-OB Engine, Mount, Lower Unit, 2.5, 2, & 3mm hex wrenches, O-ring and instruction manual

Requirements

• Fuel: At least 20% lubricant with 5-15% nitro content, fuels containing a blend of both castor and synthetic oils are best

• Glow Plug: R/C long type such as the OS #8

• Glow starter and shore equipment

Comments

• N/A.