will the tach from 1961 johnsons 20hp work with my 1991 40hp johnson
I may decommission 2 20hp johnsons on my 15 ft starcraft for the 1991 johnson 40 hp which i rebuilt 20 thou over.
My boat has two tachs for my 1961 johnson.
I got the omc control with the 40 hp and it has a 3 pin connector on it for
acc, gnd, tach signal.
I hooked up my fluke meter to the tach pin and it reads about 142.
if 142 low for this engine.
question: will the 20hp tach work with the 40 hp outboard??????????