Switching motors - need new tach?

[jddenham]

Hi,

I have a 1976 merc 500cc distributorless motor that I'm replacing with a 1975 1500cc distributor style motor. My current tach is a 12 pole. Do I need a new tach? If so, a 20 pole?

Help!

 

[ricksrster]

Re: Switching motors - need new tach?

Yes. Use the same tach. http://ww2.tflx.com/PDF/99320.pdf