Your motor should run OK as the numbers are within 10% of each other and these fishing motors came with low compression ratios anyway. After running it a bit on the required 16:1 mix, they might even come up a bit.
I ran a full story on fixing those sloppy and dripping shifters on the old boards but basically I just drill it out and glue in a brass bushing made out of tubing from the hobby store. In these photos I’m using epoxy but it seems super glue works just as good to.
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