I am having some problems with the charging system on my 1989 evinrude 150 (mod E150TXCEM) and would really appreciate any advice or information you guys could give me to get me going again. Basically.. starting battery dies after 4-5 hours of running. I checked voltage at battery while engine running at idle and get 12.1 volts. Increasing rpms.. voltage doesnt change. I have been reading all the posts I could find on this forum that have to do with charging circuits (stators,rectifiers,batteries,) and have gotten a lot of good information but before I go and swap out any electronics id like to get your thoughts.<br />First I should let you know that this engine has a bit of a history. I started working on motor because it was starting rough. It had overheated pretty bad the week before and I was just looking to see if I had caused any damage. I noticed burnt wiring power pack to coils. Also no spark cyclinders 5 and 6. To play it safe I replaced power pack, all coils, plugs, and wires. Spark is ok now (jumps 7/16 gap all cyclinders) and engine seems very responsive although tach is steady but at wot is only 4600 rpms w/21 ptich ss prop.(a little low?). Also carbs have been rebuilt, vro pump replaced (it lokked like it had bad diaphragm). Like I said engine seems to run fine but now it doesnt seem to be getting charging current. <br />I have decent meter and am ok with going through wiring circuits but am..alas..manualless. I have ordered a service manual which I hear has test procedures for charging circuits and drawings. In the meantime I wanted to check some voltages so i started with the stator ac to rectifier (2 wires yellow/grey yellow?). With engine at idle I am getting 27.5 volts ac. Is this an ok testpoint for stator ac to restifier? If so can someone tell me what the output range of stator ac for this motor is and is it a 10 amp system? Coils seem to ohm a little strange although I may not be doing it right. Red dc out of rectifier at terminal board is 12.1 dc. <br /><br />Sorry about the length of post but I hope more is better. Thanks again for any help you can give me.
