On Saturday I made the mistake of buying a Dubro spinner which has a recessed back plate.. The nose cowl of the plane prevented me from putting the Dubro on. So today I got a SIG spinner and in red like the original along with a spinner nut as per the recommendation of the forum. Now I can't decide if I want to put the spinner on or the nut? Decisions, decisions. LOL

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http://mecoa.com/cb/spinners.htm



Do yourself a favor for now and utilize the spinner nut. You are almost certain to get the black ring (it takes only one mistake in priming and starter use. Yes you discovered the price of having those lock nuts on a back plate and that is the engine/cowl installation must be planned for the dubro type of plastic spinner.

The problem on most of the flat backed plastic spinner is not the sheet metal type of screws most often used but it is deformation of the plastic plate caused by over torqueing those screws which often causes slippage of the back plate.

If you explore the link I provided it shows the metal back plate type of spinner that has a capture ring or slot for the plastic spinners. They are also the single bolt type which is far better than any multiple bolt set up because there can be not deformation of the back plate.

Yes the crankshaft adapter type can be a little more confusing and you need to use appropriate size adapters but they are far better. So do try your plastics since you already have two but you will find the spinner nut far more versatile. And when you are ready for a real spinner do consider a good aluminum type. Top of the heap are the Tru turns but the Dave Browns and some imports are just fine at around half the money. Best of all never agine the ugly plastic burn ring.

John