Puzzled, need suggestions not running all 8 cylinders.

[Wvgdutchboy]

Yeah that's incredible man I hope that fixes it

Junk in starboard tank, port tank ok. Both tanks professional cleaned also intire fuel system and injectors. Running on 8 cylinders again... yeah!!! Thanks everyone Happy holidays.

 

[techmitch]

Wow - I’m surprised how much crap is in there. Like Korkie I had my fuel pumps and injectors replaced by Merc (parts only), but I’m guessing you have the spin on filters and not the cool3 set up.
I am hoping while you are that deep you are replacing the files lines themselves with the proper marine ethanol rated fuel lines.

You may/should be sending the injectors out for professional cleaning/testing as well..

Good luck getting back to smooth running.

btw- you sig says 8.1 then 496 with straight drive- may want to clarify - if 8.1 I’m guessing it has v-drives from your first post. And 496 has bravo 3’s? Not important here but may help in the future if we know exactly what drive train you have.

I was thinking about interior fuel line degradation also.

 

[Wvgdutchboy]

I was thinking about interior fuel line degradation also.

Thanks, 8.1 L horizon 496, amberjack 340 has beam 13.5 and straight drives for sure. And yes spin on fuel filters 2 for each engine.

 

[Jimmy Buoy]

Surprised that all that crap could get through the fuel filters... Glad you found the source of the issue!