FUEL EFFICIENT OPERATION

Fuel economy is similar to fuel injection, with the simplicity of carburetion.
Digital CDI ignition system with variable timing Learn More
Includes a rev limiter to protect against damage from over-revving.
Two barrel inner-vent carburetor for more precise fuel metering
Insert style rod bearings

HIGH OUTPUT PERFORMANCE

Hemispherical combustion chamber delivers rapid combustion Learn More
9.3:1 compression ratio generates high power output without the need for premium fuel
Forged steel crankshaft
Pressure fed crankshaft bearings

SMOOTH PERFORMANCE

Integrated cylinder and head Learn More
Racing inspired forged steel connecting rods

EXCEPTIONALLY QUIET

High capacity 36 blade cooling fan
Aluminum push rods with steel tips - lighter weight, lower vibration, and quieter operation

PROVEN RELIABILITY

High capacity pump facilitates consistent oil delivery Learn More
Dual cylindrical air filter
Large diameter air intake for superior cooling
3-Year Limited Warranty
Oil Alert Learn More
Includes a rev limiter to protect against damage from over-speeding.
Insert style rod bearings

EASY TO USE AND MAINTAIN

Hour meter available
Conveniently located controls, with several configurations available based on user preference
Automotive-type spin-on oil filter

EASY STARTING

Automatic mechanical de-compression system Learn More
Variable ignition timing

EMISSIONS COMPLIANT

No catalyst necessary

AVAILABLE OPTIONS

High capacity charging systems
A variety of control box configurations
Hour meter
Dry fuel versions

	GX630	GX690
Engine Type	Air-cooled 4-stroke OHV	Air-cooled 4-stroke OHV
Bore x Stroke	78 X 72 mm	78 X 72 mm
Displacement	688 cm3	688 cm3
Net Power Output*	20.8 hp (15.5 kW) @ 3,600 rpm	22.1 hp (16.5 kW) @ 3,600 rpm
Net Torque	35.6 lb-ft (48.3 Nm) @ 2,500 rpm	35.6 lb-ft (48.3 Nm) @ 2,500 rpm
PTO Shaft Rotation	Counterclockwise (from PTO shaft side)	Counterclockwise (from PTO shaft side)
Compression Ratio	9.3:1	9.3:1
Lamp/Charge coil options	2.7A, 17A, 26A	2.7A, 17A, 26A
Carburetor	Horizontal type, two barrel butterfly valve, internal vent	Horizontal type, two barrel butterfly valve, internal vent
Ignition System	Digital CDI with variable ignition timing	Digital CDI with variable ignition timing
Starting System	Electric	Electric
Lubrication System	Forced lubrication	Forced lubrication
Governor System	Mechanical	Mechanical
Air Cleaner	Dual element	Dual element
Oil Capacity	2.1 US qt (2.0l)	2.1 US qt (2.0l)
Fuel	Unleaded 86 octane or higher	Unleaded 86 octane or higher
Dry Weight	96.8 lb (44 kg)	96.8 lb (44 kg)

GX630

GX690

Engine Type

Air-cooled 4-stroke OHV

Bore x Stroke

78 X 72 mm

Displacement

688 cm3

Net Power Output*

20.8 hp (15.5 kW) @ 3,600 rpm

22.1 hp (16.5 kW) @ 3,600 rpm

Net Torque

35.6 lb-ft (48.3 Nm) @ 2,500 rpm

PTO Shaft Rotation

Counterclockwise (from PTO shaft side)

Compression Ratio

9.3:1

Lamp/Charge coil options

2.7A, 17A, 26A

Carburetor

Horizontal type, two barrel butterfly valve, internal vent

Ignition System

Digital CDI with variable ignition timing

Starting System

Electric

Lubrication System

Forced lubrication

Governor System

Mechanical

Air Cleaner

Dual element

Oil Capacity

2.1 US qt (2.0l)

Fuel

Unleaded 86 octane or higher

Dry Weight

96.8 lb (44 kg)

	GX630	GX690
Length (min)	15.9" (405 mm)	15.9" (405 mm)
Width (min)	16.1" (410 mm)	16.1" (410 mm)
Height (min)	17.2" ( 438 mm)	17.2" ( 438 mm)

GX630

GX690

Length (min)

15.9" (405 mm)

Width (min)

16.1" (410 mm)

Height (min)

17.2" ( 438 mm)

Features

FUEL EFFICIENT OPERATION

HIGH OUTPUT PERFORMANCE

SMOOTH PERFORMANCE

EXCEPTIONALLY QUIET

PROVEN RELIABILITY

EASY TO USE AND MAINTAIN

EASY STARTING

EMISSIONS COMPLIANT

AVAILABLE OPTIONS

SPECIFICATIONS

GX630

GX690

DIMENSIONS

GX630

GX690

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