I have troy-built pressure washer machine model 020242-1. It worked ok before. Now when I shot off the spray gun for short period while the engine is running, the water is running from detergent siphoning tube. As soon as I push the spray gun trigger the water stopped running from detergent siphoning tube, I cannot understand why it start doing it and how to fix this problem. Are there any suggestions?
The siphoning mechanism on almost all power washers use "The Venturi" effect to suck up the detergent. Basically, there's no pump...the force of the water passing the siphon hose causes a vacuum which draws the detergent up the tube. There's a small ball that is supposed to fall and block the tube when the trigger is released so it sounds like it got jammed up in there somehow. You could it apart and free it up but I would recommend just purchasing an external detergent dispenser. Home Depot carries them for about 15 bucks. They allow you to use soap with high pressure and bypass the always problematic siphon system.
SOURCE: How do I change oil in my Troy Bilt Model 020245
if its a vertical engine it;s underneath the base of motor look for a plug with a square slot in it i usually use a 3/8 " extension
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