Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 103Get this manual
Carburetor Disassembly Carburetor Jet Removal
When disassembling and reassembling carburetors, retain and reassemble components to their respective carburetors (i.efloat bowls, jets, emulsion tubes ,
Remove off-idle air jets from carburetorRemove idle air jet and back draft vent jet (if equipped) from carburetor
etc )1Remove off-idle tube access plugs and off-idle lubes
from carburetor2Remove high speed fuel jet access plugs and main (high speed) fuel jet from carburetoraOff-Idle Jets (2)Idle Air JetVent Jet