Was using our pressure washer today & it started behaving as if it was running out of water – a sort of vibration in the flow – and reduced pressure.
If you released the trigger it seemed to build back to normal pressure almost immediately, & would seem OK for maybe 30 seconds before gradually dying again.
Sometimes this can happen if you’re drawing out of a trough etc, and the filter on the pipe’s blocked – but all was clear. Any ideas? – is it terminal? It’s about 10 years old, but doesn’t do a huge amount of work, maybe an hour a week on average.
Could be broken inlet/outlet valve spring in pump head, or foreign body in valve cage maybe. I have used Chamleys (Farmers Guardian ads) and found them helpful in the past, for spares for our ancient but trusty Warwick machine. Regards.