What kicks in the pressure? - Cleaning Talk - Professional Cleaning and Restoration Forum
 
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post #1 of Old 11-20-2007, 01:00 PM Thread Starter
 
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What kicks in the pressure?

OK, brand new on the board, did a quick scan of the forum, and didn't see this subject.

I have an Excell pressure sprayer with a 6hp Briggs & Stratton engine, although I'm sure my problem is probably generic.

I haven't used this sprayer for a few years. I took it out of storage, and after fiddling with it for a while( the choke had rusted solid) started it up.

When it was new, when I started the engine, it would run at a sort of "idle" speed until I pulled the trigger, then the engine would speed up a bit, and the pressure would kick in.

Now, I start it, and when I pull the trigger, the engine doesn't accelerate at all, and it's only pushing about half the pressure it should.

It's sort of like it's got two stages of pressure, and it doesn't want to kick in the "kick butt" second stage of pressure.

In your opinion, is this a "problem in the pump" deal, or could it be the engine is not reading the pressure being released by pulling the trigger?

Thanks in advance for your thoughts.
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post #2 of Old 11-21-2007, 09:06 AM
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It could be the pump. It could be the unloader (which on your unit is probably built into the pump). It could be a worn nozzle.

Start by checking that the throttle adjustment on the engine is open fully. After that, try a few different nozzles to see if that alleviates the problem. There is more likely a pump issue. I'm gona guess that replacing the pump on a unit like that is going to cost you almost as much as you paid for the machine new.

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post #3 of Old 11-21-2007, 09:45 AM Thread Starter
 
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Quote:
Originally Posted by PressurePros View Post
It could be the pump. It could be the unloader (which on your unit is probably built into the pump). It could be a worn nozzle.

Start by checking that the throttle adjustment on the engine is open fully. After that, try a few different nozzles to see if that alleviates the problem. There is more likely a pump issue. I'm gona guess that replacing the pump on a unit like that is going to cost you almost as much as you paid for the machine new.
I know it's not a worn nozzle, as it's only got a few hours on it, but now that you mention it, It struck me like the motor wasn't running at the RPM's it should, if I remember correctly.

Also, although it wasn't building up to the pressure I expected, each time I closed the nozzle, it would build up additional pressure, and when I opened the nozzle again, it would spray at the pressure it should have, but only for a second or so, then drop down to the lower pressure.

I'm guessing you're right about the engine speed.

Since it sat for so long without being used, enough time for the choke mechanism to rust up, it may be it needs a little tweaking to get the RPM's up where they should be.

I also have a Ryobi electric pressure washer, that gets up to 2100 lbs as well,(same as the other) But the wand went south after about an hour of use.

The incredible thing is that I can find absolutely nothing anywhere on the internet. I'm guessing it's a discontinued model, but still, it's amazing to me that that particular model does not show up anywhere!
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