it is running or not. When running, the pressure is fine. I have felt underneath and it appears that the water is coming from the second opening from the rear. Is there a pressure relief valve there. I have a manual but cannot find any descriptors for underneath the motor.
AXD 3020 G Pressure Washer Pump

Experienced gardeners share their insights in answering this question :
This is a piston seal issue. You can get a kit to rebuild the pump.

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The leak is caused by the filter screen in the clear adapter protruding too far into the threaded section which doesn`t allow a water tight connection on the water inlet. The fix: Make sure the clear adapter is attached to the water inlet and NOT the blue/black adapter. To confirm the clear adapter is the problem.
If the pump is leaking, the cause may be minor and easy to repair. Check the seals, packings, and O-rings for wear. These can easily be replaced, saving you the cost of a new pump. However, major leaks such as the ones caused by cracked or damaged plungers, can lead to pump failures.
Unleveled or overloaded washing machine: The washer can leak if it is overloaded or out of balance. Check to be sure the washer is level, reduce load sizes, and keep an eye out for the leak. This simple solution may solve the problem.
A leaky front load washing machine is often caused by overloading with too much clothing. Exceeding the load capacity of your washer tub can throw the machine off balance, resulting in leaks. Excessively heavy loads can also put pressure on washing machine components, like the tub bearings or drain pump.

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I have a Northstar pressure washer powered by a honda GC160 engine. The last time i used it, water leaks from the bottom of the unit, whether it is running or not. When running, the pressure is fine. I have felt underneath and it appears that the water is coming from the second opening from the rear. Is there a pressure relief valve there. I have a manual but cannot find any descriptors for underneath the motor.
ANSWER : This is a piston seal issue. You can get a kit to rebuild the pump.

My Honda pressure washer is leaking out of the thermal relief valve and I am looking for a part,I also do not have the manual. The model number is WGC 3030 and it is 3.0 gpm 9.0HP. The number on the thermal valve is 33120004,where can I find a part?
ANSWER : Does the thermal valve just screw into the pump head, if so what size thread is it? I have 1/4, 3/8, 1/2 in stock.

<!– from fixya rte –>Electrical diagram for Honda GX390 – Honda Gx390 Motor Inside Cover
ANSWER : Check out the manual here http://cdn.powerequipment.honda.com/engines/pdf/manuals/37Z5F602.pdf

My Honda 2600 psi power washer will not pull to start. It was running great then I allowed the neighbor to borrow it. He ran the washer till it was out of gas and proceeded to refuel and at this point it would no longer start. The pull cord is out about 4-6 inches out and I am concerned about taking the casing off myself.

Fearing that it may throw more off on the unit. If i take the casing off are there any spring loaded parts that will dismount?

What should I do? Spark Plug? Turn wrenches?

Please let me know

ANSWER : You should be fine to take the recoil off, there shouldn’t be anything that shoots out at you. You might want to check the oil level on the engine, many of the Honda engines won’t start unless there is enough oil in them. If your oil level is fine, check to make sure that your motor is getting spark.

Honda powwer boss 3000-whenyoupull the handale to spray it kills the engine
ANSWER : Sounds like the unloader (regulator). Try removing the nozzle, the pull the trigger with the engine running. If motor is still running then it could be the Unloader malfunctioning. If you require a new one try a bypass system for the unloader. The bypass will help save the life of the unloader.

Runs fine gc160 wont give me any pressure. i took the pump apart and cleaned it then put it all back together the pressure was intermediate but now nothing at all
ANSWER : If you give us a bit more information we may be able to assist!is it a pressure washer you are trying to get running.the number you give is the model number of the honda engine. 5.5 hp honda domestic use.what does the pump look like. etc

Honda GVC 160 lost pressure – noticed small black valve (back – rear) after pressure builds up , short spray then nothing – hot water comes shooting out the black valve – did something pop off?
ANSWER : The small black valve is called a thermal relief valve. If it is open you will have no pressure. If the water is getting hot enough to pop that valve, there might be internal problems with the pump.

Need help in getting Honda engine on NorthStar pressure washer to run.
ANSWER : Could be low water pressure I have found.Also, I purchased a can of “stuff” at Lowes today which allows you to circulate a liquid substance which lubricates the pressure pump….the pump could be frozen up…I have a rotating nozzle which I bought…and it had frozen up…this stuff works