rear engine after rain storm

[rmorris]

Obviously could be a bad mag, but doubt it
this was a symptom of the 'old' engine...but now I have an engine with 40ish hours on it doing the same thing, and the mags were definitely overhauled.

I was thinking that maybe the air filter was getting a bunch of water in it from the top scoop, then sucking it into engine

basically engine starts immed, but then dies out after about 5 seconds or so...and then takes many minutes of cranking (with small rest period for starter).
yes, tough on starter, which is why I was wondering if others are seeing anything similar.