Troubleshooting a 2015 Wacker Neuson BS70-2i That Won't Start

[MikePhua]

If your 2015 Wacker Neuson BS70-2i compactor won't start, it can be a frustrating situation. There are a variety of potential causes for a non-starting engine, including fuel, electrical, and mechanical issues. This guide will walk you through the most common causes and troubleshooting steps to get your machine back up and running.
Possible Causes for Wacker Neuson BS70-2i Not Starting

1. Fuel System Issues
   • Fuel Quality: The first thing to check is the fuel. Old or contaminated fuel can cause the engine to struggle or fail to start. If the fuel has been sitting for a while, draining it and replacing it with fresh fuel might solve the problem.
     
   • Clogged Fuel Filter: A clogged fuel filter can prevent adequate fuel flow to the engine, leading to starting issues. Check the fuel filter and replace it if necessary.
     
   • Fuel Line Blockages: Any blockages in the fuel line, whether due to dirt or debris, could cause poor fuel delivery. Inspect the fuel lines and clear any obstructions.
     
2. Electrical System Failures
   • Battery Charge: A dead or low battery can prevent the engine from starting. Check the battery charge and condition. If the battery is low, charge it and ensure the connections are clean and secure.
     
   • Starter Motor: A faulty starter motor may not turn the engine over properly. If you hear a clicking sound when attempting to start, this could be an indication that the starter motor is not functioning.
     
   • Fuses and Relays: A blown fuse or faulty relay can interrupt the starting process. Check the fuses related to the starting system and replace any that appear blown.
     
3. Ignition System Problems
   • Spark Plug Issues: The spark plug is essential for igniting the fuel-air mixture in the engine. If the spark plug is worn out or dirty, it may not provide a proper spark, resulting in starting issues. Inspect the spark plug, clean it, or replace it if necessary.
     
   • Ignition Coil: A faulty ignition coil can prevent the spark plug from firing correctly. If replacing or cleaning the spark plug doesn't work, you may need to test the ignition coil.
     
4. Compression Problems
   • Low Compression: The engine may have low compression due to worn piston rings, valves, or other internal engine components. Low compression can make starting difficult or impossible. This issue typically requires professional service, as it involves disassembling parts of the engine.
     
   • Air Filter Blockage: A clogged air filter can restrict airflow to the engine, causing poor combustion and making it difficult for the engine to start. Inspect the air filter and replace it if it appears dirty or clogged.
     
5. Safety Interlock Systems
   • Operator Presence Switch: Many machines, including the Wacker Neuson BS70-2i, are equipped with an operator presence switch that ensures the machine will not start unless the operator is seated or properly engaged. If this switch is faulty or dirty, it can prevent the machine from starting.
     
   • Kill Switch: Some models have a kill switch that may be engaged by accident, preventing the engine from starting. Check to make sure the kill switch is in the "on" position.
     

Troubleshooting Steps

1. Check Fuel System
   • Start by draining old or stale fuel and replacing it with fresh fuel. Inspect and replace the fuel filter if it appears clogged. Also, check the fuel lines for blockages or leaks and clean them as needed.
     
2. Inspect the Electrical System
   • Test the battery to ensure it's fully charged. If the battery is low or damaged, replace it. Check all fuses and relays related to the starting system. If the starter motor makes a clicking sound but doesn't engage, it may need to be replaced.
     
3. Examine the Ignition System
   • Inspect the spark plug for damage, dirt, or wear. If it looks damaged, replace it with a new one. If the spark plug appears fine, test the ignition coil to ensure it's working correctly.
     
4. Check for Compression Issues
   • Perform a compression test to determine if the engine has sufficient compression. If the test shows low compression, further inspection or professional repairs may be required.
     
5. Check Safety Interlocks
   • Verify that the operator presence switch is working correctly and ensure that the kill switch is disengaged. Also, check that the machine is not in a locked position due to safety protocols.
     

Conclusion
A Wacker Neuson BS70-2i that won't start can be caused by a variety of issues ranging from simple fuel problems to more complicated mechanical failures. By following the troubleshooting steps outlined above, you can diagnose and potentially fix the issue yourself. If the problem persists after trying these steps, it might be time to consult a professional technician for further diagnosis and repair.