Gravely 408
The Gravely 408 is a tractor produced by Gravely Lawn Tractors. It is equipped with a 304 cc 18.6 ci engine. The listed engine power is Gasoline (gross): 8 hp / 6.0 kW. Transmission: 4 forward and reverse. Operating weight: 465 lbs 210 kg.
Engine Power
Gasoline (gross): 8 hp / 6.0 kW
Fuel & Capacities
1.125 gal
4.3 L
Transmission
4 forward and reverse
Operating Weight
465 lbs
210 kg
Overview
![]() | 1970 - 1977
400 SeriesLawn tractor
400 Series
Lawn tractor |
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Production | |
|---|---|
Manufacturer | Gravely |
Lawn tractor | |
Built in Dunbar, West Virginia, USA | |
Total built | 6,689 (1970-1975) |
Original price was $763 in 1971 | |
Gravely 408 Engine | |
|---|---|
8HP Kohler 304cc 1-cyl gasoline | |
Fuel tank | 1.125 gal
4.3 L |
Engine details ... | |
Gravely 408 Transmission | |
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4-speed gear | |
Transmission details ... |
Mechanical | |
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Two-wheel drive | |
Manual steering | |
Open operator station. |
Dimensions & Tires | |
|---|---|
Weight | 372 to 465 pounds |
Front tire | 13x5.00-6 |
Rear tire | 18x8.50-8 |
Full dimensions and tires ... | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
References | |
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![]() | |
The Great Gravely Durability published in 1972 | |
Like Nobody Else published in 1976, by Gravely | |
Choice of the Pros published in 1977, by Gravely |
Engine
Engine Detail — 304 cc / 18.6 ci Gasoline
Manufacturer | Kohler K181 |
Fuel Type | Gasoline |
Configuration | 1-cylinder, air-cooled |
Displacement | 304 cc
18.6 ci |
Bore/Stroke | 2.9375x2.75 inches
75 x 70 mm |
Power (gross) | 8 hp
6.0 kW |
Rated RPM | 3800 |
Starter | electric |
Starter volts | 12 |
Sparkplug | Champion 841 |
871 RJ8C | |
Sparkplug gap | 0.025 inches
0.635 mm |
Oil capacity | 1.25 qts
1.2 L |
Transmission
Transmission — 4 forward and reverse belt-driven gear
Type | belt-driven gear |
Gears | 4 forward and reverse |
Oil capacity | 3 qts
2.8 L |
Oil type | SAE90W EP |
Four gears with forward-reverse control. | |
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Dimensions
Gravely 408 Tires | |
|---|---|
Lawn/turf front | 13x5.00-6 |
Lawn/turf rear | 18x8.50-8 |
Dimensions | |
|---|---|
Length | 56.5 inches
143 cm |
Width | 33 inches
83 cm |
Height | 37 inches
93 cm |
Weight | 465 lbs
210 kg |
Shipping weight | 372 lbs
168 kg |
Attachments
Attachment overview | |
|---|---|
34" mid-mount mower deck | |
Snowblower | |
Blade |
34" Mower deck | |
|---|---|
Type | mid-mount Gravely |
2-blade with manual lift | |
Cutting width | 34 inches
86 cm |
Photos
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Gravely Lawn Tractors Gravely 408.
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Gravely Lawn Tractors Gravely 408 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Gravely Lawn Tractors Gravely 408.
Converted Equivalents:
Horsepower (HP)8 hp
Kilowatts (kW)6 kW
Metric Horsepower (PS / CV)8.1 PS
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