Gravely 424

The Gravely 424 is a tractor produced by Gravely Lawn Tractors. It is equipped with a 491 cc 30 ci engine. The listed engine power is Gasoline (gross): 10 hp / 7.5 kW; Engine Detail — 491 cc / 30 ci (listed): 10 hp / 7.5 kW. Transmission: Swiftamatic 8. Operating weight: 900 lbs 408 kg.

Overview

	1967 - 1972 400 SeriesGarden tractor 400 Series Garden tractor

Production
Manufacturer	Gravely
Garden tractor

Gravely 424 Transmission
4-speed gear
Transmission details ...

Mechanical
Two-wheel drive
Steering	manual
Mechanical band brakes
Open operator station.

Tractor hitch
Type	sleeve hitch OptOptional

Dimensions & Tires
Wheelbase	46 inches 116 cm
Weight	900 lbs 408 kg
Front tire	16-6.50x6
Rear tire	23-8.50x12
Full dimensions and tires ...

Electrical
Ground	negative
Battery volts	12

References
Owner's Manual 424 - 430 - 432 (14535P1) published in 1969
Service Manual 424, 430, 432, and 450 (14535P1) published in 1972
Real Satisfaction... published in 1968, by Gravely
Gravely '70 published in 1970
The Great Gravely Durability published in 1972

Engine

Engine options
10HP Kohler 391cc 1-cyl gasoline
10HP Onan 491cc 1-cyl

Engine Detail — 391 cc / 23.9 ci Gasoline

Manufacturer	Kohler K241
Fuel Type	Gasoline
Configuration	1-cylinder, air-cooled horizontal-shaft
Displacement	391 cc 23.9 ci
Bore/Stroke	2.87x3.25 inches 73 x 83 mm
Power (gross)	10 hp 7.5 kW
Air cleaner	single dry element
Rated RPM	3600
Starter volts	12
Sparkplug	Champion H-10
Sparkplug gap	0.025 inches 0.635 mm
Intake valve clearance	0.009 inches (cold) 0.229 mm
Exhaust valve clearance	0.018 inches (cold) 0.457 mm
Oil capacity	2.5 qts 2.4 L

Engine Detail — 491 cc / 30 ci

Manufacturer	Onan NB
Configuration	1-cylinder, air-cooled
Displacement	491 cc 30 ci
Bore/Stroke	3.5625x3.00 inches 90 x 76 mm
Power	10 hp 7.5 kW
Rated RPM	3600
Starter volts	12

Transmission

Transmission — Swiftamatic 8

Transmission	Swiftamatic 8
Type	shaft-driven gear
Gears	4 forward and reverse
Clutch	friction cone
Oil capacity	5 qts 4.7 L
Oil type	SAE 90W-EP
Two-speed shift-on-the-move affects transmission and PTO speed. Additional two-speed range for transmission can be shifted only when stopped. Right-hand directional clutch lever controls forward and reverse.

Dimensions

Gravely 424 Tires
Lawn/turf front	16-6.50x6
Lawn/turf rear	23-8.50x12

Dimensions
Wheelbase	46 inches 116 cm
Length	75.5 inches 191 cm
Width	36.25 inches 92 cm
Height	43 inches 109 cm
Shipping weight	900 lbs 408 kg
Clearance (front axle)	10 inches 25 cm
Clearance (rear axle)	6.375 inches 16 cm
Front tread	30.5 inches 77 cm
Rear tread	28 inches 71 cm

Attachments

Attachment overview
40" mid-mount mower deck
50" mid-mount mower deck
Snowblower
Blade
Garden tractors are capable of using tillers, plows, or other ground-engaging attachments. TractorData does not list details of these attachments.

Photos

Gravely 424 tractor photo