Have a helper sit on the mower and attempt a start while you wiggle the ignition wires and connectors. Check the ignition wiring for damage, corrosion, or loose wires. Wiring specs for ignition systems vary, so I can’t be more detailed. Issues with ignition switches: loose wiring at the switch corroded terminals broken terminals spinning ignition switches. These systems are basic and tend to be the most reliable. If your mower doesn’t have a control module, then the safety sensors are wired inline to the ignition switch – meaning any sensor that is in the open position will leave the ignition switch with an open circuit (No start). Ignition switches – send commands to the control module if fitted. Ignition switches are an important part of the ignition system, bad connections here can cause lots of problems. Module – Wires come loose, have a helper attempt to start the engine while you wiggle the wiring connectors.Ĭheck also for damage, water, or scorch marks on the panel itself. Not all mowers will have one fitted, but most will. Modules could be fitted anywhere, they are usually fitted inside a hard plastic box about the size of a mobile phone.
As you know the main fuse in a mower can blow, and if it does, it will kill the power to the ignition system. All modules will have a fuse either internal or external – Check it.Īs said, all modules will have a fuse either internal or external. You can visually inspect these modules for loose connections or water damage to the printed circuit. The function of the control module is to receive a start/stop command from the ignition switch, and only out-put a start command to the starter (via the solenoid) if all the correct sensors have been engaged. Because the specs vary, I can’t be more detailed. Most modern mowers will have a Control module, they are a printed circuit with relays and resistors – they do give trouble.
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Check that all sensors are working, look to see the striker plates are closing the sensors fully.Ĭheck wiring to sensors for chafing and that the connectors are secure and free from corrosion. The complete assembly is available and not too difficult to fit. Sensors – The quick fix, hold down the lever to start the mower. The sensors are a very simple on/off switch type and rarely give trouble, it’s more common for the striking plate that pushes on the sensor to be misaligned, when this happens, the sensor is open and the engine won’t start or stops depending on where the sensors fitted. Safety features on mowers are controlled by sensors/switches and most modern mowers will wire those sensors into a control module. Riding mowers are designed with safety features built in to protect us from operator error or accident. Ask a Lawnmower Repair Expert Check Safety Sensors I earn a small commission for recommending JustAnswer mechanics, and I’m happy to do so these guys are good, I know they’ll save you money. If you need one-to-one help, check out the JustAnswer Mower Mechanic link below, where you’ll chat directly with a mower mechanic within minutes. It’s important to replace it with the correct amp rating, otherwise, you can damage the wiring circuit and components. Replacing the fuse is simple, just pull out the old one and push the new one into place. If you do hear a click sound when you turn the key, check out – “Mower Wont Start Just Clicks”. If you are in any doubt about the correct starting procedure for a lawn tractor, check out – “How to Start Husqvarna Ride-on Mower”.
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So why won’t your lawn tractor start, not even a click? The most common reason for a no start, not even a click sound, is a totally flat battery, but other likely causes include:Ī tractor mower won’t start if the blade lever/button is on, manual mowers need to be in Neutral gear, some mowers won’t allow starting if the oil level is low or the hood is open.
All mowers will have safety sensors fitted, and if the sensors are open, they won’t start. Before we assume there’s a problem, let’s take a minute to check that we’re following the correct starting procedure.
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