Sewer Jetter No Pressure? Clean the Nozzle First

Sewer Jetter No Pressure and Engine Noise? Check This First

In daily operation, many users of Sewer Jetters and high pressure cleaning machines may encounter a common issue:no pressure output accompanied by abnormal engine noise.

At first glance, this problem often seems serious. Operators may spend a long time checking the pump, engine, or hoses, but still fail to identify the root cause.

However, in many cases, the solution is much simpler than expected.

The Real Cause: A Clogged Sewer Nozzle

A recent case shared by an AMJET customer highlights this situation clearly.

The machine suddenly lost pressure during operation, and the engine began to produce unusual sounds. After multiple checks, no mechanical faults were found.

Finally, the customer contacted an AMJET engineer for support.

The diagnosis?
A clogged sewer jetter nozzle.

When the nozzle becomes blocked by debris, sediment, or dirt, the water flow is restricted. This leads to:

• Reduced or zero pressure output
• Increased load on the pump
• Abnormal engine noise

Simple Solution: Clean the Nozzle with a Nozzle Needle

The good news is that this issue can be fixed quickly.

Inside the standard accessory kit, there is a nozzle cleaning needle designed specifically for this situation.

Steps to fix the issue:

1. Remove the sewer jetter nozzle
2. Use the cleaning needle to clear any blockage
3. Flush the nozzle with clean water
4. Reinstall the nozzle and restart the machine

After cleaning:

• The pressure returns to normal
• The engine sound becomes stable
• The machine operates efficiently again

Why Regular Maintenance Matters

This case shows how important routine maintenance is for sewer jetters and high pressure washers.

A small blockage can lead to:

• Performance loss
• Increased wear on components
• Misdiagnosis of serious mechanical issues

Maintenance Tips:

• Inspect nozzles regularly
• Clean after heavy use
• Use filtered water when possible
• Keep spare nozzles and needles available

Conclusion

If your sewer jetter has no pressure and the engine sounds abnormal, don’t rush to assume a major failure.

Start with the simplest check:
Inspect and clean the nozzle.

A quick cleaning may save hours of troubleshooting and restore your machine instantly.