Fleetwin,
excellent option to open the inlet side behind the carb versus the exhaust side …… silly me never thought about it 😳

I’ll try this easier route .. I was going to clean up the carb anyway

so far I have only used deep creep and pb blaster on this fresh water engine.

to bad engines don’t have "oiling ports" in line with the crankshaft bearing … one could open them up by unscrewing a simple bolt and spray the innards with oil 💡