Spark Plug... what size??! Quick question

[Johnny H]

Hey, sorry I'm a noob to my 400 and it's 15 degrees outside and I can't get the damn thing started. What size socket do I need for my spark plug and is there any easy way of changing that ***** out?.. doesn't look like it to me
Thanks!

[ImWhite]

there is a special tool for it...some people get sockets and grind the sides down.forget what size tho,i just got a tool from my shop for 12 bucks

[fwm416ex]

The spark plug socket size is 18mm,a thin wall socket will be needed to fit in.12 point 3/8 drive socket with a 1 inch extension makes it much easier.If possible clean around plug with compressed air and a little anti seize compound on the threads never hurts