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No power to BF225

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Nigellopes

New member
Over this weekend I was running my boat through the canal, all of the sudden I heard the exhaust get extremely loud. I had my friend pull the hood off the engine and saw that the 02 sensor had spit it’s self out. I was in the canal and with a very fast current so I had to limp it though, I got out of the canal and the motor died, no power to the engine, turn the ignition nothing happens, no trim told. All engine connections seem to be fine, I checked the fuses on the port side of the engine they all appear to be fine. Are there any other fuses in the wiring for the ignition that I am over looking? I’d like to get power to the motor, then address the other issues. I’m wondering if this could have been a catastrophic failure for the motor..

tag read bf225a. BAHJ-1400940 I believe it is a 2006
thanks
 
There is a 150 amp fuse in a separate holder above the starter motor. It's the AGE fuse and if that blows the whole engine quits. Check that. Also, don't rely on visual feedback to test the see-through fuses. Pull each fuse and test with ohm meter. Should be near zero resistance.

Having said that, this is the first time on this forum in my recollection a Honda outboard literally blew out the HO2 sensor. That is seriously weird. Has anyone fooled with it recently? Possibly failing to re-install correctly.
 
So I went down the the boat yesterday and figured out what happened. Last year I had a friend of my who works for a honda marine dealer local to me, that I purchased the motor from, come and do some work on it. I take the boat off shore every once in a while so I had him replace just about all sensors, anodes, shaft bushing in the lower etc. If I’m not mistaken, when he replaced the internal zinc anodes he removed the sensor and re installed it, I put over 100 hours since had no issues. It must be the updated smaller 02 sensor because the threads in fact were corroded and blew the sensor out. Limping it through the canal, with all that heat coming out of the manifold cause the harness that goes to the fuse box to melt. Hoping to get replacement parts from local Honda dealer today. I’ll try and figure out how to post photos. I’m on my phone right now.
Thanks!
 
Good analysis and good pictures. Thanks for sharing those. Hopefully it will help others. I think that is a "first" on this forum.
 
Yip,seen that before, so make sure you order
18120-ZY3-C01ZA. it has the right size thread for the O2 sensor and repositioned to protect it from moisture contamination
 
I went to my local Honda dealer, great guys over there. He dug through his piles of old stuff, gave me the manifold with a sensor in it, harness, and the 150 Amp fuse. Told me to see if I can get it running and if so just bring him 100 bucks. Hooked the harness up, trimmed the motor up, ran a tap with some grease through the manifold on the motor the clean up the threads, cleaned everything real well, fired it up and took it for a ride. Back in action, going to bring him the left over parts and his $100. Glad it wasn’t anything serious and I was able to be back up and running in a couple of days.
 
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