How to Winterize a Pressure Washer
Learn how to properly winterize your pressure washer by adding antifreeze to the pump, draining the oil, and adding oil to the piston. Read the full article for a step-by-step guide.
How to Test a Small Engine for Spark
If your small engine isn't starting, you'll need to diagnose many issues including the spark plug. This video walks you through the steps of how to test for a spark using a spark tester.
Quick Fix: How to Replace the Outlet Connector on a Karcher Electric Pressure Washer
Learn how simple it is to replace the outlet connector on your Karcher electric pressure washer by reading this repair article.
A Quick Fix: How to Replace the Pump on a Pressure Washer
This article outlines the steps to replace or service the pump on your pressure washer. Doing this repair yourself will save you money and time.
Discussion for the Karcher K 3.99M-Plus (1.423-235.0) Pressure Washer
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Question: Shut Off
My pressure washer cycles on and off when the trigger is off. The motor is supposed to stop when you stop spraying and come on again when you start. Can't figure it out. No leaks anywhere. I've been into the pump many times and still don't completely understand all the features.
Question: On/off Switch
I have two K 3.99M pressure washers. Water is supplied and passes through the spray wand. #1, with power supplied, the manual switch will not start the pressure pump, and pops the GFCI. #2, with power supplied, the manual switch will not stop the pressure pump, nor will the pressure build up to stop it. Do I need 2 manual switches and at least 1 pressure cutoff switch? What are the part numbers? Thanks, Wally