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#4534908 - 10/05/17 08:07 PM pressure washer hard to start?
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4838
Loc: Houston, Texas
i bought a pressure washer with a Honda gx390 and compared to my Honda generator with a Honda gx390, this thing is a beast when it comes to pulling the starter rope. I always make sure I prime the pump before starting and I've heard it helps if you hold the trigger down on the wand when starting? Not sure what that does though I've never tried it.


Edited by motor_oil_madman (10/05/17 08:07 PM)
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2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4534914 - 10/05/17 08:14 PM Re: pressure washer hard to start? [Re: motor_oil_madman]
demarpaint Offline


Registered: 07/03/05
Posts: 29741
Loc: NY
I have the same engine on mine. Trigger and hold the wand when you fire it up, it will make your life a lot easier. Make sure you have the water running and the wand pointed in a safe direction.
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#4534918 - 10/05/17 08:19 PM Re: pressure washer hard to start? [Re: motor_oil_madman]
Tkonrr Offline


Registered: 04/18/15
Posts: 6
Loc: NYC
I agree, holding the trigger in helps while starting it. My friend has a Craftsman pressure washer with the Honda gx 390 engine. It became nearly impossible to start or even turn over due to massive resistance on the starter cord. Turned out it needed a valve adjustment after a few hours use when new. Starts up easily now.

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#4534939 - 10/05/17 08:36 PM Re: pressure washer hard to start? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4838
Loc: Houston, Texas
I guess you're compressing the water in the pump when the trigger isn't held down. And we all know water doesn't compress well.


Edited by motor_oil_madman (10/05/17 08:37 PM)
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4534961 - 10/05/17 09:02 PM Re: pressure washer hard to start? [Re: motor_oil_madman]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
The pump should be equipped with an unloading valve to stop this from happening.
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#4534967 - 10/05/17 09:07 PM Re: pressure washer hard to start? [Re: Linctex]
demarpaint Offline


Registered: 07/03/05
Posts: 29741
Loc: NY
Originally Posted By: Linctex
The pump should be equipped with an unloading valve to stop this from happening.


Not all of them have one. Mine is an older unit which doesn't have one, which is why I trigger it. It is also not a good idea to run the machine for more than a minute or two w/o triggering the wand.
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#4534975 - 10/05/17 09:12 PM Re: pressure washer hard to start? [Re: demarpaint]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4838
Loc: Houston, Texas
Originally Posted By: demarpaint
Originally Posted By: Linctex
The pump should be equipped with an unloading valve to stop this from happening.


Not all of them have one. Mine is an older unit which doesn't have one, which is why I trigger it. It is also not a good idea to run the machine for more than a minute or two w/o triggering the wand.


If it has a thermal bypass I don't see why it would matter. I stopped mine for no more than a minute or two to adjust the hose and move the pressure washer closer, and noticed it was dumping water out of that relief valve and also dropped the psi from 4200 to 3000psi. (I have a gauge on the wand).
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4534987 - 10/05/17 09:24 PM Re: pressure washer hard to start? [Re: motor_oil_madman]
bubbatime Offline


Registered: 03/18/08
Posts: 5622
Loc: South Florida
You HAVE to depress the handle while pulling it. Otherwise you will put too much pressure on the starting mechanism and likely break the pull cord much sooner than necessary.
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#4534988 - 10/05/17 09:26 PM Re: pressure washer hard to start? [Re: bubbatime]
4WD Online   confused


Registered: 09/21/10
Posts: 6363
Loc: Texas
Yep @ tie mine in the saddle with those heavy duty twist ties sold at TSC (Tractor Supply)

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#4535031 - 10/05/17 10:31 PM Re: pressure washer hard to start? [Re: motor_oil_madman]
WhizkidTN Offline


Registered: 12/05/16
Posts: 482
Loc: E. Tennessee
My $279 HF special requires you to hold the trigger when pulling the starting cord. A more expensive model would have the unloading valve most likely.
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#4535093 - 10/06/17 02:36 AM Re: pressure washer hard to start? [Re: motor_oil_madman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
I'm glad I clicked on this thread before buying a pressure washer. I had no idea.

I wonder if the owner's manual tells you to hold the trigger.

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#4535102 - 10/06/17 03:08 AM Re: pressure washer hard to start? [Re: motor_oil_madman]
AMC Offline


Registered: 10/17/10
Posts: 891
Loc: South Eastern, CT
Interesting observations. Must be something to do with the pump design.

My cheap little champion pressure washer is always super easy to pull over and start. I have never had to pull the trigger while starting it.
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#4535241 - 10/06/17 08:58 AM Re: pressure washer hard to start? [Re: motor_oil_madman]
boraticus Offline


Registered: 04/19/09
Posts: 2905
Loc: Canada
I use a velcro strap to depress the trigger. Be careful to not have the machine on full throttle when starting. Otherwise you'll be getting a little wet chasing the wand.

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#4535637 - 10/06/17 06:04 PM Re: pressure washer hard to start? [Re: motor_oil_madman]
dave123 Offline


Registered: 01/13/09
Posts: 2313
Loc: wi
When depressing trigger at start up use soap nozzle or none at all it will pull over like a breeze.

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#4535932 - 10/07/17 06:29 AM Re: pressure washer hard to start? [Re: motor_oil_madman]
demarpaint Offline


Registered: 07/03/05
Posts: 29741
Loc: NY
Originally Posted By: motor_oil_madman
Originally Posted By: demarpaint
Originally Posted By: Linctex
The pump should be equipped with an unloading valve to stop this from happening.


Not all of them have one. Mine is an older unit which doesn't have one, which is why I trigger it. It is also not a good idea to run the machine for more than a minute or two w/o triggering the wand.


If it has a thermal bypass I don't see why it would matter. I stopped mine for no more than a minute or two to adjust the hose and move the pressure washer closer, and noticed it was dumping water out of that relief valve and also dropped the psi from 4200 to 3000psi. (I have a gauge on the wand).


I have one unit that dumps water through a relief valve, the other doesn't have that set up. I start both with water running and the wand triggered. It helps big time. If I have to run the machine for more than two minutes or so without putting water through it I turn it off. It is a habit that carries over from the machine that doesn't have a relief valve. Either way, trigger the wand when you fire it up.

Make sure when you put it away for the winter, you do your normal engine prep routine. Then shut off the fuel flow and with the hoses off pull the starter cord and pump the water out of the pump. I have a 12" piece of garden hose with the connection attached which I screw into the water inlet and connect a funnel to the end of it. I pour RV anti-freeze into it and pull the starter cord until the anti-freeze squirts out. When that happens I fold the hose onto itself and clamp it so nothing leaks out. The last thing you need is water to freeze in the pump and wreck it. This applies to anyone who lives where freezing temps are a concern. HTH
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