Ok, last fall I got my 45 running decent. I had a regular Telex tach and tried all sorts of ways to get it to work. It would either work on low end be waaayyy off at top end or the other way around. Same results. The wiring diagram from a Clmer book says the white wire off the top coil is the tach circuit. Ok, thats the one I have been using. One the back of the tach there are various postions to set the tach for different motors, ie, 4p/2c, 6p/3c, etc. Using the white wire, It is getting one pulse per rev of the crankshaft, so, the 4p/2c seem like it should work, only read half thru out the whole range. Well, it doesn't quite work that way. I "Top Out" around 1200 rpm. Looking at the diagrams that come with the tach, AND previos posts on here about tachs, I see where SOME chryslers have a 20 pole alternator and should have a tach made especially for that type setup. I took the flywheel off of my 45 to see if that was the problem. I counted either 24 or 8 poles, depending on if you count individual poles, or the fact that they are wrapped in threes ( magnet on flywheel cover three at a time.) Also, pulses coming from white wire are D/ C, not A/C. Current tach diagram says approx 5-7 volts a/c to tach at idle on a setup that connect to rectifier, or 5 volts dc to setup that connects to coil. I have 45 v. a/c at idle. ( haven't tried to connect it that way yet, don't wan't to fry the tach just yet.)<br />Have I confused every one yet?<br />On an old 70 hp powerhear, I counted the poles and came up with 10, so I guess that one had the "20 pole" set up. This is getting to be a big pain in the @#$ and is also becoming an obsession with me. Any help out there?
