Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 95Get this manual
Idle Circuit Description Top View
Off-Idle Circuit Description
Side View
a Fuel Mi)(ture AdjustmentScrew Cap (two) Idle Air Bleed Jet Thermal Air Valve Air InlelIdle Tube
aCarburetor BodyOff-Idle Air JetOff-Idle Discharg HolesThrottle ShutterOff-Idle TubeBack Draft Circuit Port (Port Bore Only)