Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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Make sure that there are no obstructions in the hose or filter if it has one. The other thing that has to happen is, you have to use the black tip if it has quick connect tips in order to get the machine to go to low pressure for the detergent injection system to work. If it doesn't have quick connect tips then you most likely have a push/pull type nozzle on the wand that has to be pushed in for the detergent injection system to work.