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Bolens 831

Bolens 831 tractor
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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.
Bolens 831riding lawn mowerBriggs & Stratton 8hp enginePeerless 730 transmission30 inch mower decklawn tractor specs
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