Originally Posted by
Gray Beard
When I worked in a small engine repair shop we used WD-40. I have never had to use anything on a gas engine in any of my planes though. I did need a starter on one after I rebuilt a carb but after that it hand started.
When I seen this in action it was before chokes were fitted, had to buy them from Bennet. My first Q50 was choked with my finger. The plane was a Pogo if memory serves me right and using a finger wasn't convenient.