My Bolens Ride-On Mower Won't Start

Start-up Configuration

• Bolens riding mowers have a specific configuration before starting so that riders stay safe. If the blade engage lever is in the engaged position, the riding mower will not start. It also won’t start if someone is not in the seat. After putting the key in the ignition switch, the parking brake must also be engaged. The clutch-brake pedal must also be pressed in when starting. If the shift lever is in reverse while the PTO lever is engaged, the mower will also shut off or not start.

Choke System

• Problems with the choke system and settings can prevent a start over time. On Bolens riding mowers, the choke control is either on the left side of the dash or on top of the throttle. When the choke control is on before starting, it injects extra fuel into the Briggs and Stratton engine, aiding in starting if the engine is cold. However, leaving the choke control on constantly floods the engine with fuel, which will cut the engine off or prevent a start due to lack of combustion.

Fuel Problems

• An empty or near-empty fuel tank prevents a start because there isn’t enough fuel to pass through the carburetor. Old fuel can deposit sediments into the fuel line or fuel filter, clogging the fuel system before any gas reaches the fuel pump. Check fuel lines for any clogs and replace the fuel filter every 100 hours.

Spark Plug

• Engine combustion in the Bolens Briggs and Stratton engine begins with the spark plug. Therefore, a faulty spark plug can also hinder a start. The spark plug can become fouled if oil leaks into the crankcase. It can also get fouled if the engine is flooded with fuel or runs too long. According to the Bolens user manual, the spark plug condition and gap should be checked prior to storing for the season and then every 100 hours.