150 efi mercury ob doesn't start

[richardb]

My Mercury 150 EFI wont start. Computer test ok for electricity, fuel pump, no errors detected. After cleaning the spark plugs the engine starts but then shuts ndown again and dosen't start again.

electricity ok
fuel pump ok
flappers ok
spark p ok

Richard badia / dominican Republic for help

 

[Dunaruna]

Re: 150 efi mercury ob doesn't start

No errors detected with a scanner?

 

[richardb]

Re: 150 efi mercury ob doesn't start

thanks for your response Dunaruna, but the scanner doesn't detect any failure. Everything ok. Fuel pump pressure ok, what it seems is like theres more fuel flow than expected, and the machine turns off. What else can i test?

 

[richardb]

Re: 150 efi mercury ob doesn't start

scanner test ok. I've done everithing. sparks are wet. what do you recomend?

 

[Dunaruna]

Re: 150 efi mercury ob doesn't start

The merc EFI has a complicated diagnostic regime, more harm than good will come from inexperience.

First and foremost, the correct scanner will extract a code history, both soft and hard. This will point the operator in the right direction.

What scanner are you using and do you understand the data?