That moment when you turn key in your Husqvarna riding mower, and…nothing happens. No roar of engine means no more hours of work this season for that old girl. No sound at all.
No click, no crank, no sputter. Nothing. What could possibly be wrong?
Diagnosing Silent Start Problems in Husqvarna Mowers
Understanding Silent Start Issues
Sometimes a silence is harder to diagnose then a loud failure because it doesn’t offer any obvious clues. It has simply given up on you. Your first big clue that something’s amiss is there isn’t any clicking.
When an engine don’t turn over most folks automaticly think the starter motor has died. That guess are almost always incorrect. What you don’t hear is the click of the starter solenoid engaging and firing high voltage into the starter motor.
Without that, the issue is probably the safety interlock system that triggers the solenoid or the circuit powering the solenoid itselfs. Knowing this can saves you from replacing costly component too soon. For most people, the cause of a silent start try will be the safety interlock system.
Checking Safety Interlock Switches
To protect user, Husqvarna designers has incorporated various switches to keep the mower running in safe conditions only. Most often, the seat switch or the brake pedal switch are the problem. In an effort to prevent accidental starting, this system complete cuts off power to the starter circuit if it believe the brake has not been pressed all the way down or that someone hasn’t sat on machine correctly.
While it’s a great feature for protection, it can lead to headaches when one of these switch is out of place or dirty and trips the system unneccessarilly. Be sure the seat sensor is properly connect and clean, and make certain your brake pedal are pressing firm onto the floorboard. Check the fuses and battery terminals next.
Testing Battery Voltage and Connections
When the battery voltage isn’t high enough, you may still see your dashboard LEDs lit but not enough juice for the starter solenoid. The solenoid must receives a huge jolt of current to activate and pull in. And if there’s no surging of current due to a blown fuse or corroded connections, then no dice.
Use a multimeter to test the battery voltage while the ignition switch is off. It should register more than 12 volts. Charge the battery or swap it out if it doesn’t.
Another possibility is a bad ground connection which will behave like a dead battery too. Check where negative cable attaches to the chassis. If the basics pass muster, pay special attention to the neutral safety switch.
Inspecting the Neutral Safety Switch
This keep the mower from engaging when the transmission is engaged. On most Husqvarna mowers, the switch are mounted on the transmission housing. Over time vibration will cause it to get knocked loose, or it might even fail inside itself.
Often times you can manually test this and listen for a click. Rock the transmission lever back and forth between drive and neutral. If you hear a click during that movement, the switch is likely the issue.
The fix is simple just replace and go. No need for mechanic here. Lastly, examine the ignition switch.
Examining the Ignition Switch
Even when your battery is in good shape, it can prevents current from reaching the starter circuit because of internal wear. Crank the key over and really listen for anything. There is no sound.
The dash lights do not blink. The contact points in the switch might be gone. This part doesn’t cost much and isn’t hard to change.
Before diving into the innards, tackle battery connections and safety switches first. A dead silent start normaly comes down to following the electric trail until you find the gap. Repair the connection and your Husqvarna should of fire up nicely.