Hi, I'm putting another engine in my scoob, but the new engine had a cracked crank sensor (brown) so I replaced with my original one (black) I noticed that the cog behind the crank pully is different. Do I need to change that so its the original one that went with the black sensor or will it pick up the signal anyway? Cheers

 

you need to change it or it wont run.

 

Ok that's fine, I'll change it when I remove cambelt, thanks very much,