20 Most Recent Briggs & Stratton Power Products 1539 Pressure Washer Questions & Answers


Stuck choke? Like the carburetor's choke butterfly valve? There are bushings that can be replaced in the shaft. The valve plate slides out gently with needle-nosed pliars in a top to bottom motion pulling the top loose then rocking the bottom out. The butterfly plate will only go back one way so you're kinda safe there. It's in it's correct position when the valve closes off the intake throat snugly and FREELY. You can put your opened needle-nose jaws in the breather holes of the plate and slowly twist as you move the shaft in a "choke-on" "choke-off" position repetitiously until the butterfly seats in the throat with NO HANG-UP'S. It should move very freely. Once you had the butterfly out, the choke shaft will lift out of the carb. There are bushings that seat down in the top of the carb that the shaft slides thru. If the bushings are worn so that dirt is able to enter and interfere with it's air/fuel mixture. There's also a sponge washer and possibly a spring. I'd take a pic of it before removal for reference. Not sure if that helped.

Briggs &... | Answered on Mar 30, 2018


check spark first if it has spark fuel delivery is the problem check fuel filter if ok clean a rebuild carb

Briggs &... | Answered on Jan 22, 2018


Pump will freeze in cold weather from water left in sump. Get it running and instead of hooking it up to a water hose, use a short length to take a gallon of so of antifreeze.

Briggs &... | Answered on Oct 13, 2014


replace pump or service valves or check inlet for obstruction

Briggs &... | Answered on Apr 21, 2014


a lot of the dont have one but a small inline valve can be installed the fuel dripping from the carb when its turned off replace the needle valve and seat

Briggs &... | Answered on Mar 30, 2012


Have you checked for spark? You can remove the plug, touch it against the block and crank it and see if you have any spark (best done in as dark a place as possible). If you don't have spark, start by replacing the plug.

If you have spark, you can spray some starter fluid or gas into the cylinder, replace the plug and try to start it. If it runs for a few second, then you have fuel flow problem (dirty carb or filter, etc.).

Hope these basic tips get you going in the right direction.

Briggs &... | Answered on Mar 05, 2012


Sounds like the unloader valve built-in to your system is sticky. Try lowering the pressure of the regulator to lowest setting then re-adjusting. This will place a different pressure /load on the valve. Also when you store your unit, displace the water in the pump with oil so that lubricant will prevent the unloader from sticking. If you continue to have problem, replace the unloader. Good luck

Briggs &... | Answered on Jul 01, 2011


Carburetor needs to be cleaned. It sounds like a clogged/gummed high speed jet that's not providing enough gas for the load demand.

Briggs &... | Answered on Jun 25, 2011


this with the engine running? If so there eigther is a restriction in the main water feed or the pump is damaged or possibly needs to be rebuilt. Did you know you can never start the mechine with the water hooked up and on full and you should trigger the gun to force the air from the water pump before you ever start the engine. Is it a mi-t-m pump or a cat pump. The mi-t-m pumps have a problem with the plastic cages that hold the valves braking and getting stuck between the valve and the valve seat if you take the caps off the pump you can pull the peice out and the mechine will work again. The cat pumps have cremic pistion and if over heater need to be rebuilt but is a vastly better pump and if maintained wil last 25 to 30 years under heavy use

Briggs &... | Answered on Dec 08, 2010


I hope you did have it connected to a water line. I'm also assuming the pressure washer function is working ok. Some times the sypon tubing gets clogged from cleaners drying up and building up in tubing and passageway. Does your gun have a cleaning on/off function sometimes by twisting handle? If you have an extra hose, try forcing some water in the tubing while trying to apply solution. If all else fails, clean all solution passageways.

Briggs &... | Answered on Oct 02, 2010


When the trigger is pushed, the engine is supposed to rev up to increase the pressure. So from the description, is sounds like the idle speed is simply set to low and it dies. So just set the idle speed higher. You could set it as high as pulling the trigger does if you want, but that would waste gas.

Briggs &... | Answered on Sep 04, 2010


It sounds like your unloader valve has stuck. Try greasing the unloader valve.

Briggs &... | Answered on Jun 10, 2010


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.

Briggs &... | Answered on May 24, 2010

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