Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 168Get this manual
17Slide outboard shift lever into neutral position18Install throttle cable19Install shift cable assembly as shown Refer to Adjustmenr Section 7A Break-In Procedure
BREAKIN FUEL MIXTURE
During the break-in periodoperate your new outboard motor on the first 30 gallons of fuel by mixing gasoline- oil in the fuel tank at 50: ratio as described in chart belowNOTE: The 50:1 ratio gasolineoil in the fuel tank combined with the metered oil supplied by the oil injection system will supply the necessary gasoline-oil mixture required for break-in lubrication
U.sType of Oil
Quicksilver 2-Cycle Outboard Oil
Measu re
16 U.5 02 10 each gallOns of gasoline
Imperial Measure
15 Impozto each Simpgallons of gasoline