Engine died down at high RPM.

[mushman]

I didn't get to the boat today, go figure the wife wanted to spend time with her and the kids today, but tomorrow I'll check what I can if its not pouring.
I was looking at the diagrams and I can see how the plugs on each side are related to the each of the two packs.
Would a bad pack bog me down at high rpms?, or can the pack only show signs of failing at high rpms?.
Should I open her up and see if it does it again, or just let it run for a while and take a look at the plugs?.
I think I'll try swapping the packs to see if the plugs on the other side get all fouled up.
I'll get back with results as soon as I get to the boat.