I have a NS123A1 and have a small issue with it. The engine runs fine and makes good power. I'm able to run it happily around 240- 260F.
The only problem exists is this- when I try to start it when it is hot, it appears the carb is vapor locked and will not allow fuel to enter carb while it is hot, preventing it from starting. If I wait about 5 minutes it will fire up no problem. I've never had an engine do this before, and it sucked this weekend when I flamed out during a 30 minute main on a pit stop. Should have been able to fire it up in a few seconds, but it would not fire due to this problem and I was out of contention!! After waiting 5 minutes it fired right up!!
Any ideas??
fuel= Trinity 20% Monster (Power Blend).