I felt and heard a faint, intermittent, stumble during my last flight. Came and left every 12 seconds or so and stayed for maybe 4 seconds each time.
Cyl temps all equal, carb heat and mixture didn't fix it, normal mag drops, normal fuel pressure.
I changed tanks and it seemed to go away and then switched back and it was still all good. Landed 10 min later perfectly normal.
Checked the gascolator and the finger screen in the carb both perfectly clean. Tanks sump clean. I drained and flushed out the float bowl and found a fair bit of what looks like black iron grindings (magnetic). Couple particles are larger than the rest and definitely shouldn't have made it through the finger screen.
What's inside these carbs that would make this?
The finger screen had nothing in it and I have no reason to think it wasn't seating in there, it's not collapsed at all. But even if it could have gotten by it, where would this material come from? (post gascolator)
Any thoughts?
Thanks
Mike
Cyl temps all equal, carb heat and mixture didn't fix it, normal mag drops, normal fuel pressure.
I changed tanks and it seemed to go away and then switched back and it was still all good. Landed 10 min later perfectly normal.
Checked the gascolator and the finger screen in the carb both perfectly clean. Tanks sump clean. I drained and flushed out the float bowl and found a fair bit of what looks like black iron grindings (magnetic). Couple particles are larger than the rest and definitely shouldn't have made it through the finger screen.
What's inside these carbs that would make this?
The finger screen had nothing in it and I have no reason to think it wasn't seating in there, it's not collapsed at all. But even if it could have gotten by it, where would this material come from? (post gascolator)
Any thoughts?
Thanks
Mike