ORIGINAL: Rudeboy

I would say no also...

One would have to try it first of course, but of the top of my head I think nylon screws would stretch to much to securely mount an engine...

Like Zagnut said, it could work for smaller engines... but for the larger sizes... I dunno...

Also, I don't no what a #6 screw is (we define screws by the size of the screw), but I'm thinking that the holes in the engine mounting lugs are too small for a nylon screw with sufficient strength.

On some engines I have a hard time keeping the engine tight on the nylon mount with steel bolts... let alone using nylon screws as well...

But give it a try, and let us know what you come up with.