Bolens lawn tractors
Bolens 831
The Bolens 831 is a riding lawn mower produced from 1979 to 1986. It features an 8 hp Briggs & Stratton 318cc 1-cylinder gasoline engine with electric start, a 5-speed Peerless 730 belt-driven gear transmission, and two-wheel manual steering. The mower has a 30-inch mid-mount mower deck with 7 cut positions and a mechanical idler pulley clutch. It rides on 4x10.4 front and 6.5x16-8 rear tires, with a wheelbase of 43 inches and weighs 385 lbs. Electrical system includes a 12-volt battery with negative ground. The mower is designed with an open operator station and disc brakes.
Power8 hp
Founded30" deck
Model831
Technical Specifications
Detailed specifications and technical data for Bolens 831
Engine
| Type | gasoline |
|---|---|
| Cooling | air-cooled vertical-shaft |
| Starter | electric |
| Cylinders | 1-cylinder |
| Fuel tank | 0.75 gal (2.8 L) |
| Point gap | 0.020 inches (0.508 mm) |
| Rated RPM | 3600 |
| Sparkplug | Champion J-8 |
| Bore/Stroke | 3.00x2.75 inches (76 x 70 mm) |
| Displacement | 318 cc (19.44 ci) |
| Engine model | Briggs & Stratton 190707 |
| Oil capacity | 1.125 qts (1.1 L) |
| Power (gross) | 8 hp (6.0 kW) |
| Sparkplug gap | 0.030 inches (0.762 mm) |
| Starter volts | 12 |
| Oil change interval | 25 h |
Overview
| Type | Riding lawn mower |
|---|---|
| Drive | Two-wheel drive |
| Brakes | Disc brakes |
| Steering | Manual steering |
| Operator station | Open operator station |
| Production years | 1979 - 1986 |
Variants
| 830 | manual start |
|---|---|
| 831 | electric start |
Electrical
| Ground | negative |
|---|---|
| Battery AH | 19 |
| Battery volts | 12 |
References
| Books | Rear Engine Riders - Lawn Tractors published in 1979, by Bolens; Lawn Machines published in 1981, by Bolens; Lawn Machines published in 1982, by Bolens; Rear Engine Riders published in 1983, by Bolens; Riding Mowers published in 1985, by Bolens; Riding Mower Service Manual (552568-3) published in 1980; Equipment Seminar published in 1982 |
|---|
Attachments
| Type | mid-mount Bolens |
|---|---|
| Blade | 1-blade with manual lift |
| Cut height | 1.25 to 3.25 inch (3 to 8 cm) |
| Mower deck | 30" mid-mount mower deck |
| Cut positions | 7 |
| Cutting width | 30 inches (76 cm) |
| Overall width | 37.5 inches (95 cm) |
Transmission
| Type | belt-driven gear |
|---|---|
| Gears | 5 forward and 1 reverse |
| Clutch | idler pulley |
| Transmission model | Peerless 730 |
Serial Numbers
| Location | Serial number decal on the right-rear of the mower, between the engine and tire. |
|---|
Dimensions & Tires
| Length | 60 inches (152 cm) |
|---|---|
| Weight | 385 lbs (174 kg) |
| Rear tire | 6.5x16-8 |
| Wheelbase | 43 inches (109 cm) |
| Front tire | 4x10.4 |
| Height (steering wheel) | 38.4 inches (97 cm) |
Power Take-off (PTO)
| Clutch | mechanical idler pulley |
|---|---|
| PTO type | independent |
| PTO location | Mid PTO |