JOHN DEERE E100 Backfires

Fuel Shut-off Solenoid

This electromechanical plunger is designed to block the carburetor's main jet immediately when the key is turned to the 'off' position. If the internal spring or plunger is fouled by fuel varnish, it fails to seal, allowing the engine's final revolutions to pump raw fuel into a hot exhaust manifold where it ignites, causing the backfire.

Carburetor Overhaul Kit

Restricted internal passages or a degraded bowl gasket can cause a 'lean' air-fuel mixture. A lean mixture burns much slower than a stoichiometric one, meaning the combustion event is often still occurring when the exhaust valve opens, resulting in a backfire through the exhaust system or intake manifold.

SKU: 796184

Spark Plug (Resistor Type)

An incorrect gap or carbon-fouled electrode increases the ignition threshold, leading to intermittent misfires. When a cylinder fails to fire, unburnt fuel is pushed into the muffler; the subsequent successful combustion cycle then provides the heat required to detonate that accumulated fuel in the exhaust pipe.

SKU: RC12YC