how is this possible?

[Kajun37]

i was flushing my motor on the hose and emptying and packing my boat away for the next 2 months(going on deployment monday) and i decided to try to fix my new tach that didnt work right...i installed this new tach a couple weeks ago and when i would turn on the motor...the needle would just go to 7000 rpm and stay there.....wiring is correct and only possible way to wire it...i had it set on the #6 position which is supposedly 20 pole.....i got to thinking.. well let me just try different settings while its running....so i started moving the pole setting down one click at a time....when down 2 or 3 settings and my tach starts working....at neutral idle my tach is reading 1000-1100...rev'd it up a bit.. and needle movement seems to match the rev'ing,i wont have a chance to water test it for 2 months....it is set on #3 or 4..which is 8 or 10 pole!....how is this possible....i thought 1990 120 force's were 20 pole?<br /><br /><br />

 

[roscoe]

Re: how is this possible?

Indicator on tach is not aligned to correct number?<br /><br />Maybe your motor is not as old as your boat?<br />In 1992, Force 120hp went to a 12 pole tach.