Hi folks, new here so firstly a big HI from me, John, aged 68 and in the West Midlands 

I have a fairly nice "survivor" (ie un-restored but ok to look at) series 2 PAZ1 fixed speed engine.

I dug it out of the back of my unheated garage, where it has stood for around 4 years with a blanket over it.
It still had fuel in it from 4 years ago, but it fired right up on the first cranking with virtually no smoke 
I changed the oil, checked the tappets and wiped it over with a Paraffin rag.

Now to the point, I knew the governor didn't work (it never has since I got it about 10 years ago).
I stripped the governor off and discovered it only has a spring one one side of the weights 
I checked as best as I could, to make sure the missing spring was not lurking in the front casing, but I cannot see it (I hope it ain't in the sump).

So far I have not been able to source a new pair of springs.
The part number I got from a manual I down loaded ( number = PD6) comes up with nothing on several Google search terms.

So, does anyone either know of a part number I can search for, or even better a place that is likely to be able to supply?

Regards to all,
John B