I don't know who spread the rumor that none of the Mag 18's have adjustable carbs. Several did. My 1811 does, and I've worked on several other Mag 18's that did. Not all had fixed jet carbs. No idea if the one on the OP's is adjustable.... he doesn't either.

Most people don't know how to tune them anyway. Or what is even causing a fuel issue....... like a plugged carb, or a bad pump.

So is that another stab at me? Just once I'd love to open the thread where you have replied & see that you said something nice.