Petrol-Driven Pressure Washers.

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REMEMBER: For All our Actions or Inactions, there are only consequences. 

Before you buy    

1. Do your homework.  Consider carefully, exactly what type of tasks you want the washer to be able to do.  i.e.  (routine light cleaning or heavy duty).  Failure to consider this will result in you buying a machine that is woefully inadequate for some of the cleaning tasks you will want it to do.  The consequences of this are that cleaning jobs will take much longer than necessary and in all probability, your pressure washer will be overworked and its' useful life shortened.

Certainly I would strongly recommend that anyone contemplating purchasing a Pressure Washer do some research.  Enter Pressure Washers in Google or other search engines and read the reviews & other useful information given to help determine your choice on which washer is best for the tasks you wish to do.


Most Pressure Washers these days are supplied on some form of Mounted frame or as in the enclosed picture here, on a portable trolley. (Highly Recommended).  A unit similar to the enclosed weighs around 1 cwt.  A good sturdy frame with adequate sizes rubber wheels (not plastic) is the best choice for ease of manoeuverability.

Another useful consideration is the length of high-pressure hose supplied with the unit.  Many units sold have a 5 metre (17 feet approx.) hose as standard, but in practical terms, this is inadequate and requires frequent moving of the washer in order to complete your cleaning task.  Even a small or average sized family car measures over 4 metres ( 14 feet approx.) in length, so your 5 metre hose certainly isn't going to stretch all the way round without having to stop the washer and move it.  Ask your retailer if you can have a 10 metre hose supplied with your unit.  The extra expense is well worthwhile but some retailers are willing to throw in the longer hose to get your order, so ask. 

BEFORE YOU USE your pressure washer. 

Please read the Instructions first.

The 2 critical components of your washer are the Engine and the Pressure Pump.

Both need Oil.

Don't assume that these come delivered full of oil.  They aren't, and even if they say they do, check them carefully before you pull that starter cord.  Regardless of how eager you are to get going with your new 'toys"  "boys", Do Not Start your machine until you have filled both the Engine and the Pump to the correct level with the Correct Grade of Oil Specified for each.

Think of the consequences if you don't adhere to this.  Your car engine isn't immune from being run without oil, neither is your Pressure washer engine or its pump! 

If all else fails ~ Read the Instructions ! 

If you start your machine without reading the instructions, the chances are that the real failure you'll face, will be to get it started again after you're discovered that you've ran the Engine and the Pump without oil !!! 

A word on Instruction Manuals.  (especially if they're foreign).  Whilst these have steadily improved over the years, many still leave room for improvement.  Instruction and Operating Manuals aren't always written by an experienced end-user of the product, but more often than not, by someone in the company delegated to do so by virtue of their job description and not necessarily their ability, expertise or experience of using the end product themselves. 

Rule (1).  Don't expect the grade or type of oil for the engine or pump to be listed under the section which advises you to fill them in the first place, or under the technical specifications page (often it isn't), so where do you find it?  Unfortunately, in many cases you will have to read the whole manual thoroughly or other documentation supplied with the washer until you find the reference to these.  Frustrating though it is, it comes with the territory.  If you can't find it or it has been ommitted from the manual, contact your supplier and get the information you require from them.   Above all, don't be tempted to use any engine oil you may have kicking around your garage even if it's a good quality grade oil.  It may be good for your car engine, but it is probably the incorrct grade or type for your pressure washer engine and especially the pump.   You mustn't take this for granted, so protect your investment even though it means a frustrating delay in using your washer for the first time.  In the absence of reference to the above, don't let your enthusiasm for getting started with your machine over-rule your common sense.  Think of the consequences !

Petrol-driven Pressure washers dont employ the same technology as most electric powered models; namely autoshut-off when the trigger is released.  This means the engine continues to run even with the trigger off and consequently the pump is still running at full pressure.  To reduce the pressure, bypass valves are employed, but this increases wear and tear on the valves and consequently shortens their useful working lives.    If you have to release the trigger for any reason or move other items out of your way which necessitates releasing the trigger for more than a few seconds, my advice from both a safety point-of-view (1st. consideration) and to minimise wear & tear, stress etc., on the engine & pump is to switch the engine off in the manner prescribed by the manufacturer.

When starting or restarting your machine, it is necessary with most models to operate the trigger before pulling the start cord.  This is because pressure builds up in the pump as soon as you have connected your water supply hose to the inlet connection.  If your mains water pressure is within the norm, then the pressure at the pump will already be likewise once you have connected up your supply hose and turned the water on.  Although mains water supply pressure varies from area to area, even relatively low mains pressure is sufficient to raise the pressure at the washer pump to make pulling the start cord on your engine feel like trying to shove your car with it still in gear, so unless your model includes some bypass technology to avoid having to operate the trigger when starting, then you will have to follow the advice above.


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