Small Engine Troubleshooting Problems? Ask a Mechanic Now.
I would try and see if you can upgrade to a bigger fuel pump. If you are not seeing much fuel in filter, then you are not getting the fuel to the Generator that is needed. Do you see any downside to the outboard engine(s)? I would recommend changine filters or getting a new pump. If you can run it alone and it never has a problem, the problem is going to be in the outboards taking too much from the Generator. Let me know if I can be of more assistance. GL!