[Richard L]

Have you altered the water pressure by adjusting the 806-162 water pressure switch?

tests to perform:
1. I suggest checking the water first first.
2. Clip the water jet on the screen and manually activating the syste by groung thwe brown wire (uith engien running), The spray should be smooth without splutter.
3. If you have a pressure gauge check if the water pressure is around 100psi.