I have a hedge trimmer I'm troubleshooting (link) and I'm wanting to rule out the ignition coil. What resistance should I measure across a typical small engine ignition coil? I would have thought down around 50 ohms or less, but I'm measuring up in the Kohms.
It typically depends on the model but 50 ohms across the positive wire post and the spark plug wire post would indicate a problem. While I can't definitively answer what range your specific coil should read, it would typically be good to see an automotive coil read ~10,000 ohms for this check.
Where you would see a low resistance is across the primary winding. That would be the positive wire and the negative wire posts. This should read a negligible resistance, think 0-10 ohms (give or take).