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Prop slow to start rotation on hot start

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DesertNomad

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I typically land and taxi for fuel, then start again to taxi to my hangar.

Sometimes during this hot start, there will be a short (1 second or less) delay after engaging the starter before the prop starts turning. Sometimes it will turn 10-20 degrees, pause for less than a second and then rotate maybe 3 blades and start.

Mine is a O-540 carburated engine.

Is this likely related to the battery or the starter? I have already eplaced the starter wire with copper as this as an SB or AD (can't recall).

The battery and starter were new in May 2013 and have 333 hours.
 

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