Cheers for the information ched plenty of flow is coming out but very slow rotation so im thinking the jets installed are to big I'll have a look at what came fitted and take it from there thanks again ??I'll let you know if it works like a dream or I chucked it at the nearest wall ?They look the right nozzle size if your pressure washer is 250 bar 15 lpm. If you have different max pressure then check the chart but remember it's 7.5lpm as you have flow split between nozzles!!!
The other think to double check is the screw thread on your fsc - it's probably 1/4" bsp but double check.
As for fan width I believe 15-degree nozzles or 25 degree nozzles are ok - I believe it's a bit of a personal thing???
First think I would do is see what came fitted as if they are 'bigger' nozzles then that's probably the issue as if not enough pressure/flow is coming out of a nozzle it wont allow the fsc to rotate very well and it will leave 'tiger stripes' .
Hope that helps?
Let us know how you get on.