Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 100Get this manual
High Altitude Jet Chart Model 225 with WMH 19A and WMH 46 Carburetors Outboard Operating Elevation (Above Sea Level)
Carburetion Identification Number
WMH 19A46-1
JetFuel Mixture Screw
Jet Size: Adjust Fuel Mixture Screw :
Cyl#2 (.074) .060 Cyl#4 (.074) .060 Cyl#6 (.074) .060
Cyl#1 (.074)
Progression
5000 ft- 7500 ft(1524m2286m)
WM 19A46-2
Cyl#3 (.076)
Progression
WMH 19A146-3
Cyl#5 (.076)
Progression
WM 19A46-1 ,2,3
Mixture Screw
Reset Idle Mixture Screws, If Required
Cyl#2 (.068)
Cyl#1 (.068)
WMH 19A146-1
Progression
7500 ft- 10000 ft(2286mand Up)
WM 19A146-2
Cyl#4 (.068)
Cyl#3 (.070)