My Northstar Turbo nozzle emits a solid stream of water without any turbo action.

The orifice is plugged and the ventures are compromised.

Turbo heads are pressure rated for different pressure washers, your turbo head is most likely rated bellow the maximum pressure of your washer which in turn causes a pressure build up in the hose and it's eventual failure.

I hate to tell you this but parts for the turbo are not availible.You will have to replace the turbo nozzle.Last I heard they were very expensive.Like $180 . www.sewvac.com

That nozzle actually rotates by water pressure. This allows the 0 degree nozzle (which has the most pressure) to rotate and therefore make a larger pattern. The rotating mechanism is not turning. Most likely it is corroded. If you're handy you might be able to disassemble it and clean it. If not that try soaking in something like CLR to clean it.

Sounds like you may have some dirt inside your turbo nozzle.

I used a vise and pipe wrench to loosen. Have to be careful with the vise that you don't over tighten it and damage the hose fitting. When replacing the nozzle, lube the threads with non-water soluble grease.

www.powerclean-engineering.co.uk

Turbo nozzle

Most commonly, debris gets plugged internally in the nozzle holes. Using a small pick from the outside, with the nozzle removed from the wand (it is threaded on), you can try to dislodge debris caught in the nozzle holes.

I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae

The wand is dirty!! Clean out the Nozzle with a small diameter wire.

bypass valve is shot or stuck in the "open" position