I am now approaching 70 hours on my RV-12, and since I bought the firewall forward kit early in the build; fall of 2010, the battery is now 4 years old. I always pull a few blades though before starting, which is an old habit from my round engine Cessna 195 days. Hey, old habits are hard to break! Anyway, I am experiencing an engine rotation stall, as the first piston approaches TDC. I immediately release the starter, then hit it again. It always goes on the second try, but I was wondering if anyone else is experiencing this, or if I need to do a load test on the battery. I do have soft start installed, and use ignition "A" only until I get a start. When pulling the prop though by hand, I have detected an increase in compression as the engine breaks in, which is perhaps why I didn't experience this stall on start-up until recently. I even tried leaving a battery tender on it until I am ready to fly, which did not help. Everything else appears normal, and I continue to see 13.8 volts during flight. I hesitate to start a systematic troubleshooting routine, if others are experiencing a similar stall on start-ups. Any thought out there??
Tom
Tom
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