Question about Honda 13 Hp 4000psi 4gpm Pressure Washer Ez4040 Pump

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What type oil is used in the pump? Checked engine oil and it's full. The oil in the oump seems to be low

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You should use what the pump manufacturer recommends. Typically a 30wt non-detergent (non foaming) oil. Do not over fill. If there is a sight glass half way is normal. Or if it has a dip stick follow the mark there.
Here is a great link for pressure washer parts and info
This link goes right to oil page:

Posted on Jul 12, 2010


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Low oil pressure light either stays on or cuts off when engine revs. what is the cause?

If the oil pump has been checked and proper operation verified, and if the correct type of oil is being used, the engine may well be headed for failure.

Mar 12, 2015 | Cars & Trucks

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No oil pressure when idling/stoplight

What is the mileage on the vehicle? What type of oil are you using, synthetic or conventional oil? Older engines that have a fair amount of wear (loose essentially). I had this problem on two different vehicles. If the oil is not near time to be changed (fairly clean oil) I would get a new oil filter and prepare it by filling it with STP oil treatment. This is thick stuff and will thicken your oil. Remove the old oil filter and put the new one on. Start the engine and let it idle for a minute then shut it off. Check the oil level and add more STP to bring it back up to the full mark. Start it and check the oil pressure. If this helps bring the pressure up then I'd say its time to go to a thicker oil. I switched to 0w40 synthetic after trying 5w30 (5w30 is recommended by mfr.) and have had no more trouble. The thing is that synthetic oil tends to thin more at temperature than conventional oil does.

Nov 29, 2014 | 2001 Jeep Cherokee

2 Answers

Oil light keeps coming on and dinging in my 1999 Town & Country but the oil is full

check /replace the oil pressure sensor . Have the oil pressure checked by a mechanical gauge to prove that the oil pressure is ok.

Aug 01, 2014 | 1999 Chrysler Town & Country

1 Answer

On my cadillac cts 2003 the oil pressure low came on after my car kept pulling back as i drove it, than i couldnt pump the gas and had to turn the engine off. I dont know if its because i put a type of gas...

Check the oil level in the engine. If it's low then add some oil. If oil level on the dipstick is between full and low then you better have a mechanic look at it, could failed oil pump.

May 09, 2014 | Cars & Trucks

1 Answer


This is the "Low Oil Pressure Warning" light. It is RED for a reason! When this light (or any RED warning light for that matter) comes on, pull over and shut the engine OFF at once. Allowing the engine to run with insufficient oil pressure can cause a catastrophic failure in mere seconds. Such a failure can cost thousands of dollars to repair.
This warning is most often the result of a very low oil level as indicated when checking on the oil dipstick. The engine oil level should be maintained as close to the "full" mark as possible - without exceeding it. Oil should never be allowed to drop below the "low" mark on the dipstick. If the oil level is shown to be between full and low, the light is probably coming on as a result of a faulty oil pump (the oil level should be checked with the vehicle parked on level ground, with the engine OFF). A faulty oil pump is unable to pump the oil with enough pressure to reach all the moving parts of the engine that require lubrication. Without proper lubrication, connected moving parts heat up, expand and seize. Moving parts are expected to move - not be prevented from moving.
If your engine shut down, it may be the result of some of the internal parts seizing. Hopefully, this is not the case. Check the oil level and top off as needed to bring the level up and attempt to start the engine and have the vehicle checked by a trusted mechanic.
Good luck!

May 17, 2013 | Cars & Trucks

1 Answer

How to repair the problem of Low Oil Pressure Warning Light?

check temperature of engine consider oil cooler if you drive it hard Re: Jeff

Apr 13, 2012 | Cars & Trucks

2 Answers

99 chevy lumina oil light came on it started to knock right then and then started to chug. turned it off and then checked the oil, its full. it will start but it chugs really bad.

Sounds like the oil pump has given out or the pick up screen could be clogged up. You will lock up the engine if you try to run it this way. Have the oil pump checked as well as the pick up screen.

Jun 18, 2011 | Chevrolet Lumina Cars & Trucks

2 Answers

While driving on the highway the check engine light came on. I did a systems check and it said low oil pressure.

did your oil light come on as well?? Sounds like your oil pump is going bad just from what you told me.....Check your oil and make sure you have it full...
Dont run your engine with low oil pressure as it could seize especially if your oil pump isnt working.

Mar 23, 2011 | Mercury Milan Cars & Trucks

1 Answer

I have a Harley Davison XLH 1000 Sportster . It seems to put oil in the tank but not back in the motor . When you turn the motor over oil comes out the oil fill.

You may just have it overfilled. If you checked your oil before you started the engine up and found it to be low and added oil, this is more than likely the case. Since the oil tank is higher than the engine, the Sportster (and Softail models) have a tendency to "oil soak". What is happening is as the bike sits the oil seeps past the check valve in the oil pump and starts to settle in the engine. When you check the oil tank, it's low. So, you add a quart. When you start the engine or turn it with the starter, the oil pump pumps the oil out of the engine and into the tank which is already full. The oil has to go somewhere so out the filler it comes.

Now, to determine if your oil pump is indeed pumping into the engine, screw the oil pressure sending unit out and remove the spark plugs. Spin the engine with the starter and watch to see if the oil is being pumped out. If so, the oil pump is fine. We already know that the scavenger pump is pumping oil back into the tank. So, if you think the engine is overfilled, drain about half of the oil out of the tank and start the engine. Watch the oil level in the tank with a flashlight. Do not allow it to run dry. Allow the engine to run until it is warm and then check the oil. There are two marks on the dipstick. The top mark is "FULL HOT" and the lower mark is "FULL COLD". Check the oil with the bike on the side stand. Do not overfill.

Mar 23, 2011 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

The low oil pressure came on and then she stalled ,i checked the oil and it was full it wont turn over now any ideas?????

does not sound too good get oil pressure checked can have lots of oil in engine but if oil pump fails no oil being pumped so engine locks up
solution get oil pressure checked with manual gauge

Feb 06, 2011 | 2002 Ford Explorer

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