I have a nylon/plastic spinner on my 4*60 with Magnum 91 four stroke
My brother has one on a GP Super Sportster with the same engine
We always use an electric starter and have had no problems

I see a fair number of four strokes with them.

I like aluminum spinners, and have a couple, but I'll use whatever is available. I like the Higley lock nut and acorn nut setup for models that do not need a spinner. My brother mostly uses just the nuts that come with the engine;and no spinner.