Re: 1979 85HP Evinrude amplifier problem
Again, thank you all for your speedy assistance.<br /><br />Both batteries have died since we last tested and will not hold a charge. Considering what has been said about the importance of having a good, fully charged battery, we felt it silly to try and test with an automotive battery. Maybe it has the cranking amps, but why risk the ambiguity when performing tests and I do not want to waste your all's time any more than needed.<br /><br />The pulse-pack is a very new looking OMC<br />Model/Part# 389550<br /><br />Other Numbers from the Engine:<br />From Transom Mount Serial# plate:<br /> Ser.# E01080<br /> Mod.# 125183C<br /><br />From Intake Manifold: 316652<br />From Exhaust cover inspection plate: 310523<br />From Head (not power head) 316464<br /><br />I am wondering if that OMC part# means anything to anyone?<br /><br />I went to a website and found a CDI catalog in pdf format. (Didn't know if I can post websites or not so I did not list URL here).<br /><br />In that catalog, I found that the cross for an OMC part# 389550 is a CDI/Rapair # 113-7123<br /><br />In that same pdf document I went to page 32 and it says the 113-7123 is for a 1971 100HP engine.<br /><br />Anything for a 1972 100HP or 125HP engine should be the Rapair# 113-8362.<br /><br />I could not find an OMC link on the web to find what OMC says should be the proper module for a 1972 125HP Evinrude.<br /><br />I am not sure if any of that matters even, since I have not determined, recently and for sure, using the tests you fine people have relayed to me, that the pulse-pack is bad. I do find it interesting, however, that the CDI catalog says the OMC part I have is for a 1971 100HP and not the 1972 125HP engine my cousin and I believe we have. Which brings me to my next question:<br /><br />How can I be sure, with the model and serial#'s I have found that the engine I THINK I have is the one I am truly dealing with? It seems to me that a plate on the transom mount bracket can not tell me which powerhead I actually have installed.<br /><br />Also, the Clymer manual says I can find the model# of the power head on a "welch plug" or "welsch plug" and shows a "typical" location and a picture of a 1.5HP engine. I can not find any such plug on this engine's power head (I assume the powerhead is the same as what I would call the BLOCK of an engine in a car, NOT the HEAD that has the valves and sparkplugs on it). Is this welsch plug a freeze plug of some kind?<br /><br />Do any of you fine people know where on this powerhead/block I can find a model# and how I can use it to ascertain what the HP of this engine really is so I can figure out which pulse-pack/amplifier I really need to have? This is not at all an overwhelming task for me, but that CDI catalog has me wondering if I have the right pulsepack/amplifier now and perhaps this one failed because it is under-rated for what I truly have.<br /><br />Ledgefinder wrote:<br />Check that you're getting 12V to the box (red wire) with the ignition to ON. Rapair says to test the sensor box by momentarily touching together the two leads that go to the sensor (often both black with white stripe). Pull the fat wire going from the coil to the distributor (under the flywheel) & place it near a ground. You should get a spark when you touch the two sensor leads together. If you have the instrument to measure it, the box should send a 150V pulse to the coil (on the blue wire). To fire the points-based box, momentarily ground the single wire leading to the points, check for spark and/or 150V. Be advised that OMC put a ton more ground wires in some of these systems than show up on wiring diagrams, particularly extra ones leading to various things under the flywheel.<br /><end of quote><br /><br />I guess I have the points-based ignition then, since there are only four wires coming out of my OMC pulsepack. One red, one blue, one purple and only ONE Black with white stripe going towards the distributor. (Not two as in the sensor version)<br /><br />I will also check the anti-reverse spring RJOHNSON mentioned. I assume by "grounding the system" you mean grounding the pulses from the sensor to the pulsepack, since the sensor is the only thing under the stator where you say this spring is.... thanks for that tip.<br /><br />Thank you all for all of your help and I'll check back with my results.<br /><br />P.S. Can a moderator move this thread to another topic such as "1972 125HP has no spark" or some such thing? It may help others later when they search this forum and not be mislead by my incorrect topic.
