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.

[kilr4d]

Originally Posted by rmorris

basically engine starts immed, but then dies out after about 5 seconds or so....

That sounds like loss of fuel?

Do you have fuel flow gauges? Have you tried leaving the boost pump on low?

Does it spit unburned fuel out the cylinder drains while you're cranking?

[JimC]

Most starters specify the max cranking period in seconds and the min rest period in minutes, not the other way around. I'd start flying with a spare from now on.

[hharney]

Robert
Could there be water in the fuel? Right side is always selected for the rear engine. Have you noticed any water when you sump the tanks? It would probably take a lot of water but this would be unrelated to the new engine

[rmorris]

Herb - yep, I had same thought, and after heavy rain storm I do extra sumping just to make sure, no evidence of any water in fuel at any of the three points (main, aux, engine dump)

a combustion engine is pretty simple, so it has to be spark, fuel, or air....I think I am going to figure out a makeshift plug for top scoop to eliminate water coming into compartment that direction, and see if that helps any....

[kilr4d]

Originally Posted by rmorris

I think I am going to figure out a makeshift plug for top scoop to eliminate water coming into compartment that direction, and see if that helps any....

https://www.aircraftcovers.com/337#15

[Kim Geyer]

Think your mag switch might be getting leaked on?