Thanks for all the suggestions.
I called 9 shops this morning. Got tired of the rejection and resigned myself to trying to fix it myself or trying to get an appointment next week in SD.
I put it on the hose in the driveway and couldn’t make it misfire. So, I took it to the lake where it misfired terribly. At my wits end I made one more call to J&J Marine in South Haven who told me to bring it by and they could look at it Wednesday. It’s in their hands now.
I’ll follow up when I have a resolution but I appreciate all of the good ideas you all have. Nice to have a community to lean on when needed.