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2006 BF225 ECNM part number question

J

Jsas1

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I have a 2006 BF225 A6XA BAGJ-1400223. The current ECM on the motor is 34750-ZY3-A01. I believe I have the updated exhaust manifold and O2 sensor (sensor is the 14mm version). I thought I needed the ECM 34750-ZY3-A04, so bought a used one off ebay. When I plugged in the A04 ECM, it starts, idles a bit fast for a few seconds, then stall. I plugged the A01 back and seems to run ok. Did I waste the $ on the A04 unit?
 
Not sure if you wasted the money. I'm attaching Honda SB 70, which tells you what ECU goes with what HO2 sensors.
 

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If the numbers chawk_man give you match up with your "new" ECM, don't give up trying it right away.

I say that because the ECM is "adaptive learned" and may have come off an engine that had sensors and wear that was quite different than yours.

So, it might take a bit of running to adapt to your engine and smooth out.

Just a thought.

Good luck.
 
Thanks guys! I will look at the SB70. The only issue with trying to run it so it might "adapt", is that right now it only runs for a few seconds before it stalls. I have only run it on earmuff so far, not in the water.
 
I just realized that I should clarify that I am using "alternative" Honda O2 sensor part number 06356-ZY3-307. As I understand it, this O2 sensor is the exact same as the 35655-ZY3-013 (just $60 instead of $300).
 
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SB70 says that for my engine (A6XA BAGJ-1400223) I should be using the updated 14mm O2 sensor (like I said above, I am using the 06356-ZY3-307), and it says I should be using the ECM part number 34750-ZY3-A04. So maybe I do need to keep trying to run it? Or maybe I got a bad ECM?
 
One thing I've seen with some car manufacturers is that, initially, you need to allow the engine to idle until it reaches temperature. Advancing the throttle before that, interferes with the "learn" process of the ECM.

If you attempted it "catch it" by increasing the throttle last time, just allow it to die and then just restart it if you try it again. I would give it several chances to catch and idle on it's own before giving up.

And, yes, of course you could have gotten a bad ECM. There are places that repair them for cars but I don't know about outboards although, I don't see why not since, essentially, they're in the same "family" as 15 to 25 year old autos.
 
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