Reply To: Correcting fixed ignition timing

[sidevalve5]

That is very interesting. Have a Hayter Condor mower fitted with a Kohler K181 engine that’s always been a pig to start. The automatic compression release does not operate on every pull of the cord. Or it kicks back. It used to burn oil for fun, so I took the engine apart and then got a pattern re-build kit from the USA. After a rebore I put it together and the engine itself ran beautifully. Starting though was still a pain. I adjusted the ACP tab, made sure I still had a 6mm spark in air and the carb was still supplying fuel, but still no better. It’s not helped with the pull cord handle being under the machine’s handlebars. I then got a Ransomes Bobcat zero turn mower, so put the Hayter at the back of the shed.

Just checked the Kohler engine manual and the ignition should be timed to 20 degrees BTDC. Your post have given me some thought and will again have a look at the timing. If anyone has any tips on what to look out for on the Kohler engine, I would be very grateful. From what I understand they are often difficult starters. As the ignition is fixed, the spark excellent and compression was good, I mostly blamed the carb. But think that’s fine, but the timing could be out.