I've never heard of a TT .46 not shutting down. Has anyone else?

I own TT, both Pro & GP, OS AX, GMS, Evo, Magnum 2 & 4-stroke and Tower. The only 2 that won't shut down immediately are the Tower .46-it takes 30 seconds or so and a new Magnum .70 4-stroke-takes a minute to stop. The Tower is on a float plane-how's that for matching an engine to a purpose. The Mag .70 is still in a Big Stick being broken-in.

You might need to let one of your local experts look at the engine and help you tune it. TT .46s are great engines and as you can tell by the number of questions on them here on RCU, there are only rare problems. You may just have one of the 1% that slipped through quality control.