Grumpy,

Thanks a million for the reply. Fortunately the R clip was on the shaft when I began to try to fix it, it was just missing the pinch bolt & nut so the arm was off the shaft.

I reconnected it per your directions with a new pinch bolt & nut and did the adjustment. The pressure washer is working much better now and when in bypass mode it rpms just surge up and down a bit, not revving like mad as before.

The only remaining issue is with steps #7 & #8 of the slow adjustment as it doesn't seem that my throttle valve closes fully, as though there were slack in the mechanism to push it to close. I am suspecting it may be due to the knackered governor spring, which I ordered along with a throttle return spring.

Thanks again for your help and if you have any other suggestions regarding the throttle closing issue I am all ears.