I had an OA-60 a long time ago, and it liked it rich when restarting, even when hot.
That bein’ say-ed – these things also tend to flood easily, my P-30 is picky that way. Any hot re-start after even the briefest of shut-downs usually requires closing the needle valve then reopening it after the engine fires up.
By contrast, my F-70 is a good girl, and requires no special treatment to get started, hot, cold, or anything in between.
All of my A series Johnsons (I consider the BN to be one of them) are good at restarting on the first pull when warm. I do habitually turn the fuel petcock to closed anytime I shut them down, even if its only going to be for a few seconds. The exception to the one-pull rule seems to be Johnson # 3999, which I currently have apart. When it was warmed up, it was still necessary to choke it and open the needle valve to get it to re-start. The piston rings were stuck in their grooves on the starboard side piston, so I wonder if that was a contributing factor.
I’m assuming your OA is an easy starter when cold?
Best,
PM T2
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