merc racing tach setting

[boatn70]

what should a merc racing tach be set at. the switch on the back has 4 positions.
1-4cyl
2-6cyl
3-8cyl
4-12PALT ????

what is number 4

i believe the part number on the tach is 93953 0294

thanks
kevin

[BRENT GILL]

The # 4 position!

[Superdave]

12 pole alternator driven. AKA all Merc outboards
Dave