Need Help 2010 Sundancer 240 Mercruiser 5.0 MPI

[Fabian Soto]

2010 Sundancer 240 Mercruiser 5.0 MPI

After 6 months no using my boat last weekend when I was running this happened
Boat was running perfect no problems just those beeping noise, also had issues to torn on the motor in neutral always had to Foward a little bit

Engine Misfire code 71
Oxígen sensor code 34

I did a tuned up change
spark plugs
2 gas filter
Also injectors were really bad I cleaned them. also empty the hole gas tank and put new gas

codes didn’t disappears still there I turn on the boat in house for maybe 15 min and reset the system from the clock were have MODE systems
At this point I don’t now what to do have friends that say that kind of motor need a computer to delete those codes
Another version is that when I put the bot on the water again maybe after 20
Min codes disappears
Another version is remove positive from battery
Please someone that can help me with this will be really appreciated
Please check the link for more reference

https://drive.google.com/file/d/1-YlsrykAPT0qx7M5r2ZsAyPXDI5rSnKI/view?usp=drivesdk

 

[El Capitan]

Yes. Try disconnecting the battery for a few minutes then it should reset the codes , but it’s no guarantee. Usually it’s done by a software program.

 

[Fabian Soto]

Yes. Try disconnecting the battery for a few minutes then it should reset the codes , but it’s no guarantee. Usually it’s done by a software program.

Ok I will try that thanks