1977 johnson 85 hp ignition switch

Joined
Aug 14, 2013
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11
I bought a boat from a guy who lost the keys. So I ordered a new switch. The switch is a sierra mp41000. I am having trouble matching the wires to the correct tabs on the new switch. The new switch has the following information


C=choke
I= ignition circuit
S= solenoid
B=batery
M=magneto to circuit
M= not labeled. Looks to be a negative

The old switch is labeled as
M= black and yellow wire (kill circuit)
M=black (I assume is a ground)
A= purple wire (accessory)
C=purple and white wire (choke)
B= red (batery)
S= white (solenoid)
Can any one match these up?
 
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