Right, prop changed.... more questions!
The prop appears to have a rubber insert - what is this for some sort of shock absorbing function I suppose? Both props are the same anyway.
On the old prop, this rubber bit looks a bit buggered - see the attached photos of the new and old for comparison.
The central splined part inside the prop doesn't seem to be loose or anything - is this still going to be OK to use if I want/need to reinstall it? The bushing looks a bit like rubber sometimes does when it has had oil on it (e.g. suspension bushes that have suffered from oil contamination). The effect seems to be only the outside layer, after I took the photos I pulled the flappy loose bit off and it seems ok underneath.
The new prop while slightly smaller diameter has slightly broader blades so I guess the overall blade surface area should be similar. Bit chilly for ribbing today but the forecast for tomorrow doesn't look too serious so I hope to be able to test the new prop and the new aux then, and see what we get
The overhaul manual says that the nut holding the prop on should only be torqued to 14nm does this sound right? I guess it shouldn't be too tight as there is a nylon bush under the nut which would obviously not stand up to being really really tight, but 14nm is not a lot... and it took a #kin big grunt to shift the old one even with lots of WD40 first (though it could have just been seized after 6 years on there).