I just replaced my 1978 Chrysler 105 with a rebuilt 1990 Johnson 90. The mechanic hooked up the tach but it is reading high. And although being able to bury the 6000 gauge at 2/3 throttle is very soul satisfying< I would really like to have an accurate reading. Does anyone know the pole setting on the Chrysler and on the Johnson? The tach is OE Aquameter from 1978. My mechanic does not know how to fix it without me buying a new tach.<br />Thanks<br />Greg
