Re: Tech for 150 Force 5cyl
OK.
All Force 150 hp from 1989 thru 1991 revision "B", use a 20 pole tach.
Newer models use a 12 pole tach, I believe.
Some tach can be switched to be used on a 20 or a 12 pole system.
Teleflex model 53743p or faris # DD2TC9819A are both 20 pole tachs.
If you need a 12 pole tach, most any will do.