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I got a merc 70 horse on the boat i just bought. It is a 3 cylinder 2-stroker. The guy i bought it off of just changed the tach before he sold it and said he wasnt sure if he had it set up properly. I took it out for a spin and at first the tach showed idle at a healthy 1000rpm. But as soon as a dropped the hammer, the tach spun right around past 6000rpm. The motor didnt sound as if it was over-revving or anything and ran very well. Once i let off, the tach showed idle at 2300rpm.
There are a number of settings on the back of the tach, each labeled with number of cylinders and a pulse number. There is no 3 cylinder setting on it and i have no clue what the pulse number means.
Any help is much appreciated, chances are if I cant figure it out, I'll end up on a lake switching settings and runnin the motor to find out.
Thanx
Bill
There are a number of settings on the back of the tach, each labeled with number of cylinders and a pulse number. There is no 3 cylinder setting on it and i have no clue what the pulse number means.
Any help is much appreciated, chances are if I cant figure it out, I'll end up on a lake switching settings and runnin the motor to find out.
Thanx
Bill