Power head replacement 225 optimax 2002

[BlueIceCPA]

I have a 2002 Optimax 225 that need a new Power Head, what years may I install a New Power head. 2002,2003,2004,2005,2006,2007?

Are rebuilt Power Heads worth the Chance to use instead of a new one?:eek:

Thanks for your Wisdom!

Warren