Briggs & Stratton 691029 Nut Starter Solenoid Sprayers Hydro-Force's own advice is to

Hydro-Force's own advice is to keep several bottles on the truck so you can change chemistry by swapping the bottle rather than emptying

Internal spray crevice tool by PMF Tools This is bested used between 200 and 500psi but does have a vacuum release thumb-slide if you would like to use it with an extractor under 200psi

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It is cheap enough that most workshops keep a spare and replace rather than fight with it

Briggs & Stratton 691029 Nut Starter Solenoid Sprayers Hydro-Force's own advice is toOverview Genuine Briggs & Stratton part number 691029 Nut Starter Solenoid. What it fits Verified against the Briggs & Stratton parts documentation Carpet Cleaners Warehouse holds for the engines fitted to HydraMaster truckmounts: HydraMaster Boxxer 318 engine 356447 1239 G1, listed as NUT (Starter Solenoid), reference 683, in the Alternator, Ignition, Switches group Briggs & Stratton build the same part into many engines. This list is what we can