Sounds like you got a blocked idle jet.
I half retract my previous thought as T-15 has now proved that it wasn't so much Clymer that was the problem, but actually a rather bizarre bit of design by Mercury! Having said that, If you get a Clymer, be absolutely sure you have the correct one, as I have just demonstrated....
If it's carb info you're after, Clymer haven't let me down yet.
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