Question about Briggs & Stratton Prosumer 20324 Gas Pressure Washer

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I have a Briggs & Stratton Pro 3400 pressure washer that I got new last year and used for maybe 5 hours and it worked great. Have had it stored since then with stabilizer in the gas (I didn't run it dry) and now it won't run for more than a minute or two without dying. A dealer said it was probably bad gas and I now know that even with the stabilizer I should have run it dry last year before storing. Everything is like brand-new including plug and air filter so it must be the gas/carberator gunk from the gas. What do I need to do to clean it out so it will start an run again?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Tnsiouxfalls
  • 617 Answers

SOURCE: Briggs and Stratton pressure washer fuel leak

You've hit the nail on the head.The float,needle and seat are stuck wide open.Once the carburetor bowl is full of fuel the float rises up on top which pushes the needle back into the seat shutting of the flow of fuel.As the engine consumes that fuel the float drops and opens the needle and seat filling the bowl and shutting off the fuel again.Things that cause this process to not work are:forgetting to empty or run out the fuel before storing it for the winter.Sediment buildup in the bowl.Mineral deposits in the needle and seat.
Not emptying out the carb can leave water in the bowl which freezes,crushing the float.It also promotes sediment buildup and mineral deposits.The float when crushed or cracked will not float,nor shut off fuel.Sediment takes away capacity of fuel in the bowl,very necessary for wide open throttle.Mineral deposits build up to the point that the needle and seat can't make a good seal so fuel will continue into the carburetor.
Enough information yet?
To repair,take the nut off the bottom of the carburetor bowl.There are the float and needle and seat assemblies.All three need to be replaced,$10 max.After you get the parts replace one piece at a time so you can see how they go together.Next replace the spark plug, engine oil and air cleaner.They are fuel fouled and even if you could get the engine started will only add more damage to your engine.BEFORE you put the new plug in cycle the engine by pulling the starting cord a few times to get rid of the excess fuel.When there's now more fuel in the cylinder replace the plug,filter and oil.
That's it!Take your time and you can do it just fine.Re-post if you have any more troubles.

Posted on Jan 13, 2010

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  • 15 Answers

SOURCE: craftsman pressure washer constantly fluctuates and then stops

sounds like fuel problem. Either water\trash at bottom of tank, or most likely, carb needs to be disassembled and bowl and jets sprayed out w\carb cleaner.my money is on the latter.

Posted on Feb 10, 2010

  • 1 Answer

SOURCE: 18hp twin cylinder Briggs & Stratton backfire

Check to see if the carb is clean, if so the anti diesel value could not be working. Apply 12 volts to value and see if it move's. If that works then you may what to check the fuel pump and see if it pumps. After you tried all that then you may have change the main jet size because these engines come with a small jet for the EPA.

Posted on Apr 23, 2010

  • 2 Answers

SOURCE: I have a Briggs & Stratton pressure washer,

If #1 doesn't work, the ports in your carb could be clogged. I just dealt with this problem this weekend. This is a relatively easy fix. Locate your carburetor and find the aluminum bowl underneath. On the bottom of the bowl, you'll find a bolt. Loosen the bolt (gasoline will come out because the bowl is a reservoir for gas, but please make sure you've turned the gas supply off) and remove the bolt and the bowl. Clean any debris out of the bowl. The ports are holes in the bolt you removed. Make sure that air can pass through these holes (I blow through them, but I don't mind the taste of gas too much. Probably NOT healthy. You can use thin wire, carb cleaner, etc..) Reassemble and your motor may start, if this was the problem. Make sure that the bowl seats properly and that you are careful screwing in the bolt, lest you cross-thread it. Hope that helps.

Posted on Apr 29, 2010

Biggdex35
  • 333 Answers

SOURCE: Engine wont stay running

It is a diaphram carb. Doe's the primer **** straight gas or does it have air bubbles in it? If it has bubbles in it then it is a leak in the fuel line.
If not then Unhook the intake fuel line and pump the bulb until all of the gas is out of it. Then pour the gas out of the tank and rinse it out with new gas. Pour in new gas and it should be ok.

Posted on May 24, 2010

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