I just dropped a YS110 in a Sig Mayhem, I don't really care for the supplied spinner. I have a 2 3/4 true turn but won't fit the props I want to use. Darn APC wide props. I want to use a 16x6, 17x4w (if i can find it) and try some wood props. Any suggestions on a quality spinner-2 3/4 size and light.

I use Great Plane spinners, they are light and durable. They have an aluminum backplate and 4 screws to hold the spinner on, which is a very good thing considering one of my spinner came off on me due to the high RPM of the YS110. The spinner also has a thinner plastic where it allows you to cut for a wider prop. I've done it many times and you can do it with an xacto knife.

I think I know the one your talking about, I use them on all my smaller planes-Love the aluminum back plate, But the ones I have only have two screws. I was also looking for all aluminum. I may be confused on what your using cause you said you can trim it??? Do you have a link?

I use the Great Planes spinners mentioned in MicroDat's post on engines up to 1.60. They are light weight, they come in colors, require no special mounting hardware and are not expensive.
The pictures show a Great Planes spinner that I'm using on a YS 1.10 powered Quest 90 with an APC 16x6 prop. The larger spinners have 4 screws.

This is a good idea-your picture only shows two screws but that may be a smaller version. I really like using these. I take it you have no problems using this style on a 110 YS. Thanks for your input.

Yes, the spinner on the Quest 90 in the picture is a smaller size at 2 1/2 inches and has two screw holes. I use 3 1/4 inch diameter spinners on my OS 1.60 2-strokes and they have 4 screw holes. I have had absolutely no problems with any of them.

If you feel uncomfortable about widening the cutouts in the spinner cone to fit the prop you might want to look for a different spinner. I use a Black&Decker rotary tool to bench the spinner cone cutouts.

I do the same with all my planes that use a 2.25 to 2.75 spinners. Seems all my APC props 12.25X3.75 which I use the most have to be cut out. Don't forget to balance the spinner after.