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10022 10023 10302E 10303E
This is basically for all V4 Gearcase Outboards (1974-1999) (more or less 85hp-120hp)
78890T Used in 120hp 2
Also includes Matching Cover 981099 / 0981099 Casting No
but not always on the later versions
Mercury 25-21720 25-45253 25-45254 Outboard Remote Trim Pump O-Ring Set 45197A2 Complete Upper & Lower Gearcases 10022 10023 10302E 10303EPart Number(s) Included Mercury 25 26834 > 25 21720 > 25 48171 (X5) The general parts diagrams you see online will say that this requires 4 of these for the top and then will not give a part number for #12 which from the hard copy manuals is also 25 21720 Mercury 25 45253 (x2) Mercury 25 45254 (x1) General Application Compatibility For Mercury Prestolite Trim Pumps (Square Reservoir) which is the standard trim pump found on most MerCruiser