Guru
Joined: 11/02/2018
Location: AustraliaPosts: 1483
| Posted: 11:35am 25 Jan 2023 |
Without before and after values ignition coil resistance doesn't tell you much, they can be 5k to 25k secondary and .5R to 5R primary. If you can get a spark length of 5mm or more at cranking speed for a non-CDI system it is probably ok. 10mm or more for a CDI.
On small engines sometimes, if it happens to stop with a valve open (usually exhaust) it will stick there so you have no compression. When you try to pull start can you feel the compression stroke?
I have a small generator that won't start in cold weather unless I use AeroStart ether spray. We have a local brand called Start Ya Bastard! that works quite well.