Mercury 850 Wiring not matching any diagrams

[GEDaggett]

I have a Mercury 850 Thunderbolt outboard and the Ignition switch is shot. I ordered and received a Sierra MP41000 switch but my problem is knowing what wired go to each wire on the switch. My wiring colors are different that the ones shown on most of the diagrams I have found on line. Here are the wire colors on the harness. black, Brown, white, red, light blue, yellow and orange.
Any ideas what each color is or where to get the diagram that will tell me?

Thanks,

Gary

 

[alldodge]

Howdy

Have a look here
http://www.maxrules.com/oldmercs/Wiring/0_1965a/7.pdf


And here is the main page of other models
http://www.maxrules.com/mercwireindex.html

 

[Chris1956]

You have a single coil and a distributor or 4 coils and no distributor? They are wired differently. Could your light blue wire really be grey?

 

[Faztbullet]

Here ya go...
Switch----------------------------------------Harness
red............................................... .......red
yellow/blk..........................................grey
yellow/red.........................................yellow
black............................................. ...orange
black............................................. ...black
purple .............................................beige (actually white)