Firing Order for 2005 XB12S??? HELP

[GAXB9R]

 

[Sirius815]

 

[Big twin]

1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2

 

[Xb12sLt]

Just be carefull not to mix up the plug wires, if you put them on the plugs wrong it will run backwards.

 

[user_deleted]

if you put them on the plugs wrong it will run backwards

like a Cox or Wen-Mac powered gas airplane motor which will run either direction????