RE: Vortech Spinner fitment problem
Yes, what they have supplied is a threaded Lock Nut.
Use the prop washer and nut supplied with the engine and then this threaded Lock Nut.
Put on the spinner backplate.
Then the prop, prop washer and nut and thighten as usual. Then add the Threaded lock nut and then the spinner cone.
Now thread the spinner bolt through the hole and hand tighten it into the Threaded Nut until it stops. Now measure what's still left showing (say 1cm), remove the bolt and chop off say 1.2 cm.
If you chop of 1cm you'll have proplems tightening the spinner cone as the bolt will be slightly to long.
The threaded Lock Nut will be quite long giving you plenty of thead to tighten into.