Westerbeke 8 generator will not start

[woodyapex]

I really need to get the geni going in the next 24 hours ideally .
So any help will be much appreciated .
So I've not had this generator run since I got it but ,
I had a guy from the keys give it a quick turn over . And he did a few things and it gave a cough and splutter and died again . At this point he sighted that it's the exhaust a that was all he said . Any how it will turn over but maybe not that fast , I've since found the 2 fuel filters full of **** and I mean full .
With those changed it still does not run . Not even a hint of running .
Fuel is coming out of every thing I open so it seems that the fuel pump is ok .
So
My thoughts
Could it be all 3 injectors .
Could it be the injector pump .
Could it be heater plugs .

What would you guys suggest ?
I need to get this fixed asap
Thanks in advance woody