Yamaha YT6800
The Yamaha YT6800 is a tractor produced by Yamaha Lawn Tractors. It is equipped with a 573 cc 34.97 ci engine. The listed engine power is Gasoline (gross): 18 hp / 13.4 kW. Operating weight: 540 lbs 244 kg.
Engine Power
Gasoline (gross): 18 hp / 13.4 kW
Fuel & Capacities
2.5 gal
9.5 L
Operating Weight
540 lbs
244 kg
Overview
 | 1989 - 1992
Lawn tractor |
|---|
Production | |
|---|---|
Manufacturer | Yamaha |
Lawn tractor | |
Original price was $3,795 in 1991 | |
Yamaha YT6800 Engine | |
|---|---|
18HP Yamaha 573cc 2-cyl gasoline | |
Fuel tank | 2.5 gal
9.5 L |
Engine details ...  | |
Yamaha YT6800 Transmission | |
|---|---|
hydrostatic | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Drum brakes | |
Open operator station |
Power Take-off (PTO) | |
|---|---|
Mid PTO | independent |
Clutch | electric |
Dimensions & Tires | |
|---|---|
Wheelbase | 46.1 inches
117 cm |
Weight | 540 lbs
244 kg |
Front tire | 15x6.00-6 |
Rear tire | 20x10.00-8 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | flywheel magneto |
Charging amps | 7 |
Charging volts | 14.5 |
Battery volts | 12 |
Battery AH | 26 |
References | |
|---|---|
 | |
Lawn Tractors YT3600/YT5700/YT6700/YT6800 published in 1990, by Yamaha | |
YT6800 published in 1988, by Yamaha | |
Service Manual YT6800N (LIT-19616-00-28) published in 1990 |
Engine
Engine Detail — 573 cc / 34.97 ci Gasoline
Manufacturer | Yamaha |
Fuel Type | Gasoline |
Configuration | 2-cylinder, air-cooled vertical-shaft V-Twin |
Displacement | 573 cc
34.97 ci |
Bore/Stroke | 3.07x2.36 inches
78 x 60 mm |
Power (gross) | 18 hp
13.4 kW |
Compression | 8.6:1 |
Starter | electric |
Starter volts | 12 |
Oil capacity | 1.9 qts
1.8 L |
Sparkplug | NGK BPR5HS |
Sparkplug gap | 0.026 inches
0.660 mm |
Yamaha YT6800 Engine | |
|---|---|
 |
Transmission
Transmission — belt-driven hydrostatic
Type | belt-driven hydrostatic |
 | |
Dimensions
Yamaha YT6800 Tires | |
|---|---|
Lawn/turf front | 15x6.00-6 |
Lawn/turf rear | 20x10.00-8 |
Dimensions | |
|---|---|
Wheelbase | 46.1 inches
117 cm |
Length | 68.9 inches
175 cm |
Width | 63.4 inches
161 cm |
Height | 41.1 inches
104 cm |
Shipping weight | 540 lbs
244 kg |
Front tread | 29.1 inches
73 cm |
Rear tread | 28.7 inches
72 cm |
Attachments
Attachment overview | |
|---|---|
48" mid-mount mower deck | |
Snowblower | |
Blade |
48" Mower deck | |
|---|---|
Type | mid-mount Yamaha |
3-blade | |
Cutting width | 48 inches
121 cm |
Cut height | 1.5 to 4.5 inch
3 to 11 cm |
Photos
Yamaha YT6800 tractor photo
Recommended Implements & Sizing Guide
Engineering recommendations for Yamaha Lawn Tractors Yamaha YT6800 based on its 18 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 1 to 2 Bottom (12")1 - 2 铧 (30 cm) | Light Duty | Ideal for garden plots and light sandy soil. |
Rotary Cutter / MowerMowing & Clearing | 4 ft (48 in)1.2 m | Light Duty | Pasture clipping and light brush under 1" diameter. |
Rotary TillerSeedbed Prep | 42 to 48 in105 - 120 cm | Light Duty | Covers compact tractor tire width. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Yamaha Lawn Tractors Yamaha YT6800.
Estimated Continuous Field Runtime: 2.7 hrs
Approximately 2.7 hours of continuous field operation at ~75% rated power on a full tank (2.5 gal / 9.5 L).
Estimated 75% Load Fuel Burn~0.9 gal/hr (3.5 L/hr)
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
Yamaha Lawn Tractors Yamaha YT6800 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Yamaha Lawn Tractors Yamaha YT6800.
Converted Equivalents:
Horsepower (HP)18 hp
Kilowatts (kW)13.4 kW
Metric Horsepower (PS / CV)18.2 PS
Direct Competitor Comparison
Compare Yamaha YT6800 against same-era industry alternatives in the same horsepower class.
Current Model
Yamaha Lawn Tractors
Yamaha YT6800
Engine Power:Gasoline (gross): 18 hp / 13.4 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester Type A 15HP
Engine Power:16.7
Production Years:1908 - 1911
Related models
Yamaha lawn tractors YT5700
- Power:
- 16
- Production years:
- 1990 - 1991
Yamaha lawn tractors YT6700
- Power:
- 18
- Production years:
- 1990 - 1992
Yamaha lawn tractors YT3600
- Power:
- 12
- Production years:
- 1988 - 1992