I also agree.

Be sure your battery is fully charged, clean the cone and the spinner, be sure the prop is rotated clockwise to the compression stroke and only prime it a little if not at all. I have a Saito .82 and it doesn't need any priming to get started. At first, I'd prime it like a 2-stroke and it hydro-locked.

Oh, and also, I purchased a silicon cone and replaced the original Hobbico cone. The silicon seem to grip better and cleans up easier without bits and pieces falling off.