Unti is out of warranty and from the manual lists part no. 1.423-954.0
Immediately when plugged in to power and after the ''RESET'' on GFCI is pressed the motor turns on. This is regardless of the power switch being ''OFF'' or ''ON'' on the side of the unit OR regardless if the gun trigger is being pulled. When the power switch is ''ON'' and trigger is pulled, the pressure from the nozzle is less than 50% of normal.
I remember the unit wouldn't make a noise until the switch was turned to ON. And only then, it would run a very quick pressurizing cycle and then shut off until the trigger was pressed.
I found a 90850340 K-Switch from an online parts store but not sure if this is the cause of the issue or not. I have completely taken off the housing and taken a look into the electrical housing box but I'm at a loss for what the crux of the issue is. Please help!
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Sounds like the pump seals are bad. The manual says to only use these a few minutes at a time, most people try to clean the patio etc with them, run them too long, and burn out the pump seals - don't ask me how I know this.
The motor is holding pressure in the line. Check the manual. I don't think it is supposed to cycle that much. If it's not designed to do that, then there is a seal or a bearing that is leaking. It's letting water pressure escape the hose by letting water seep back into the pump. The motor is pushing more pressure into the line to keep up with the internal leak. Two times a second seems like a lot, and the noise is probably annoying. If the unit is new, take it back. If it's doing the job, run the equipment until it dies, or else take it for repairs.
We had a similar problem with a paint sprayer. Paint sprayers also hold pressure on a line, except the fluid is paint instead of water. When the machine sensed a loss of pressure, it would cycle once to restore pressure. After a while it was cycling constantly, just like your machine. Working indoors with the constant noise was a nuisance. I had the machine rebuilt, and used it for another year before buying a heavier machine. I don't know if there is a business that rebuilds your equipment, or how hard parts are to find.
If it has the same good compression it did when new, replacing the carb will probably fix your problems. Be real sure about the compression, an engine with low compression and a funky carb might just as well get replaced.