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Hello my name is ***** ***** am I speaking with?
I read what you wrote. How is it I can help you?
It's not quite that simple. There have been dozens of different ECM555's over the years. Did you make sure that you had the correct ECM by looking up the part number for it by the engine serial number?
Nothing Mercury is done by model year, it's all done by serial number. What is the serial number on your engine, and what is the part number on the ECM you got. I can look it up to see if you have the right ECM or not.
Okay you have the wrong ECM for your engine. 865008T03 is the part number on the ECM that you need. 866130T01 is not the correct ECM, that is for another engine. You will need to get the correct ECM for your engine.
Did you have any further questions on the issue or does that cover it for you?
.., however the only difference on a 2003 and a 2007 mercruiser 6.2 is the pickup coil on the distributor
Are you sure about that?
Each different part number ECM is unique. Different engines work different ways. The outer casing of the ECM's may look the same but the circuit board inside of it are different. I can tell you that this has nothing to do with a cam sensor. The engine doesn't need a cam sensor to run. The reason for a cam sensor is so that the engine starts quicker. The engine needs a crank sensor in order to run. If the engine had just a crank sensor, it would take 3 or 4 revolutions of the engine before the ECM knew what the position of the crank and cam shafts where. On engines that have cam sensors, what those are for is to allow the engine to start quicker than it normally would with just a crank sensor. Engines that have just crank sensors take 3 to 4 revolutions before the engine will attempt to start. Engines that have both crank and cam sensors can start in under 1 revolution. After looking at the picture I added, does that all make sense to you.
in the picture I gave you, you can see there are 17 (if I counted right) different ECM's just in that picture alone. Only 1 of them will work with your engine. I can also tell you that there are probably closer to 50 in total different 555 style ECMs. But only 1 will work correctly with your engine. If they all "could" work, Mercury wouldn't have to have 50 different ones made.
I'm trying to help you out and save you a headache. The ECM you have isn't going to work. It's up to you if you want to believe me or not. If you don't, then you are going to be in for a big surprise when you learn this the hard way.
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