Question about Northstar Professional Series Pressure Washer 4000 PSI

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I have a Northstar GX series pressure washer with a Cat pump model 3SP30G1. Honda engine starts right up but no water from wand. Water source into unit seems sufficient still no water out. Any ideas?

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Pressure Washer Pump and Engine Stops Suddenly

The pump might be binding against the motor, causing the pump to overheat and temporarilly "seize up" and shut the engine off.
After cooling down for a brief period (5~10 mins) the engine can usually be re-started, but the overheating problem will keep coming back.

This happens when the pump either wasn't seated against the engine properly during it's initial instalation, or the pump housing wasn't machined properly and the PTO shaft is trying to drive the pump at a slight angle = excessive friction = overheating.

Try this:
1) Loosen the bolts that mount the pump to the engine just enough so that the pump can be wiggled slightly.
2) With the engine power switch in the "OFF" position, slowly pull the recoil starter rope so that the engine / pump completes about two revolutions. This helps to align the pump surface with the engine.
3) Lightly snug the pump mounting bolts in a criss-cross pattern, then slowly pull the recoil starter rope again to ensure that the pump isn't binding.
4) Finish tightening the pump mounting bolts in the criss-cross pattern (approx. 21 foot pounds torque).

The entire process should take you roughly about 10 mins from start to finish.

If this doesn't remedy your problem, then try running the engine for 20 mins with the pump COMPLETELY removed so as to isolate the components.

Posted on Sep 01, 2009

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1 Answer

I have. Honda pressure washer that has no pressure The motor says GX160. The pump is a CAT Pump w N932547 on the pump What could b wrong w the pump ? Should I try to tear it apart ??


leave the pump alone until you have cleaned out the jet at the end of the wand
if that is blocked the pressure valve will re-circle water making you think the pump is faulty
if the jet is clean , check the pressure regulator for correct operation
this is all on the assumption that you have water connected to the pump in the first place

Oct 14, 2016 | Honda Garden

2 Answers

Cant start the unit ,there is to much pressure on the pull chord when water is hooked up.


Trying to start a pressure washer with water supply on and gun trigger off will be a difficult task. It could be comparred to trying to start a lawn mower with the mower in tall grass. Place the mower on the drive or walkway and pulling the rope to start the engine is much easier. It is easy to start your pressure washer with no water in the system however there is a remote possibility that you could overheat the seals if you take too long to turn on the water. It is a little more difficult to start the washer with water supply on and someone holding the trigger to wand open. This will prevents pressure from building and making engine hard to start. You will not damage your washer if you start it with water supply off if you flood the pump and pressure hose with water first . Here is the procedure I use if i am working alone. I trun on the water to pump and open trigger to gun to allow water to flow into pump and pressure hose. Turn off water (leaving the water supply on will make it a little harder to pull starter). Start engine while holding trigger to gun open. When engine starts release gun causing unloader to activate circulating water in pump. Now turn on water and you are ready to work. If your system is under warranty however, I would advise to use the starting procedure outlined by mfg (hold open trigger to gun however). To get the longest life from unit try using it at say 75% of capacity or lower if your can and use max pressure on the tuffest jobs. Leaving your washer at full pressure for all jobs is like driving your car at 100 mph everywhere your go. Good luck.

Aug 24, 2010 | Northstar Professional Series Pressure...

1 Answer

Water does not come out of the lance when I squeeze the trigger


HI it sounds like you may just have a blocked jet on the end of your lance. Please remove and clean.

May 31, 2010 | Northstar Professional Series Pressure...

1 Answer

NO PRESSURE


Before you start up the pressure washer, hook up the garden hose, turn on the water, and wait for the water to come out the wand.(keep the triger depressed) If the water just mildly sprays out the nozzle then wait a few minutes for the air to bleed out of it. If the water just drips is has a weak stream then there is an obstruction either before the trigger or the nozzle. If you see water running out of the pump then your pump has damaged seals and/or cracked ceramic pistons. Pressure washers are great but need care. They can not be left out to freeze or it will damage unit. Also they can not be DRY STARTED. They must have water running through them, before start up or it will burn up the seals. If you have any other questions or comments pertaining to this issue please let me know. I will do my best to assist you. Thank you.

May 19, 2009 | Northstar Professional Series Pressure...

1 Answer

Not getting any pressure at nozzle.


Can anyone Solve this? My simoniz S2500 gas powered pressure washer has low pressure coming right from the outlet. It used to be high pressure until now.. I think it has something to do with the pump and if so, is there anything I can do to repair this problem? The screen is good; water comes out of the hose good, wand is ok......Just that lower pressure is at the wand even at high settings....It comes in a form of a spray in both modes......

May 17, 2009 | Honda Water Pump 2 Inch IntakeOutlet 5 Hp...

1 Answer

My Northstar Pressure Washer Pump does not boost water pressure


Pump will power up, but when I attempt to use the wand the motor sounds like it is running on one leg & blows circuit breaker----Ser# 1575551-1101 5160 Model #1575551E

May 11, 2009 | Northstar Pressure Washer 3000 PSI

1 Answer

Had the Northstar 3000 psi Pressure Washer for 2 months and it started leaking oil from the pump during use. Took it to Northern and they are replacing the pump under warranty but said it was likely...


It is easy to check if your hose and quick connects are supplying enough water to the pump. Your pressure washer gallon per minuite requirements are printed on the machine and also on the pressure tips in GPM. Your post indicates 2.5 gpm but check your documentation of GPM. Next remove the tip from the wand and connect your hose with current quick connects to the machine. Start engine and direct the pressure wand into a bucket for exactly one minute. Measure the amount of water in the bucket, it should be very close to stated gallons. Do the same test with tip installed and compare measurement. If pump is starving for water you will not get proper amount of water in the bucket and the water hose will collapse. Two to four gallons of water per minute is not very demanding and should be delivered even with very small opening. You can even just direct the hose into the bucket for one minute and check how much water your hose is capable of delivering. I believe that you will find no problem with water delivery to pump. I would certainly enlighten Northern with your findings and question their evaluation. When you start using your pressure washer again try using it at lowest pressure to get the job done. Lowering the pressure to about 75% of max will increase the life of the pump and engine. Good luck with you pump

May 08, 2009 | Northstar Pressure Washer 3000 PSI

1 Answer

I have NorthStar 2000 psi pressure washer with a


1999 campbell hausfield 1800 psi--2.2gpm. weak pressure at the nozzle. water sprays out, but with the pressure of a garden hose.

Mar 20, 2009 | Garden

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