Originally Posted by
MattKennedy
I need some guidance on something. Unfortunately, explaining is going to be difficult without photos but I'm new and haven't yet reached the necessary number of posts required before I can post photos. So here goes.
I am in the middle of a building a kit (Sig Kadet Sr.) and plan to use a new Saito .62 I've purchased. Sig recommends a 2" spinner. So after much looking I bought a Dave Brown Vortech 2" "standard" aluminum spinner. Dave Brown recommends their "short" adapter nut for spinners under 2.5" so that is what I bought to go with.
I just received the spinner and adapter nut so I thought I'd check to see how they fit together on the engine. So I first removed the Saito washer, prop nut and lock nut. I then slipped the spinner backing plate all the way down the engine shaft until it was against the brass-colored non-removable spacer (with the knurled face - sorry not sure what this is called). I then spun the adapter nut onto the end of the threaded engine shaft as far as it would go. It spun easily until it bottomed out so I'm pretty certain it was all the way on even though it is only finger tight. I then put the spinner cone itself over the adapter nut and screwed the retaining screw through the tip of the spinner cone and into the adapter nut.
Here is the problem. The spinner cone is still about 1/4" short of reaching it's backing plate. It would seem I'd either need a longer spinner cone or a shorter threaded shaft on the engine. I've done a lot of searching and haven't read anything like this. I am surprised as it doesn't seem like I'm using overly small or large engine or spinner. . This is the shortest adapter nut Dave Brown has available and it is really pretty short - just under 3/4" total. A longer adapter nut would only push the spinner further away from the backing plate.
Thoughts?
Thanks for the help!
-Matt
Matt,
A prop is more thick then where the spacer is located on the shaft. So, you need to mount the prop that you will be using. I think that you are trying to describe the prop hub for the thing with a knurled face.