GASKET - Mark 10, 15,28,25,30H,55H,35A,55,58,75,78 & Merc 100,150,200,250,1000,1100,1150,300,350,400,450,500,650 (3&4 cyl), 700 (6 cyl), 800, 850 (4&6cyl), 900 (6 cyl) & 950 (6 cyl)

GASKET - Mark 10, 15,28,25,30H,55H,35A,55,58,75,78 & Merc 100,150,200,250,1000,1100,1150,300,350,400,450,500,650 (3&4 cyl), 700 (6 cyl), 800, 850 (4&6cyl), 900 (6 cyl) & 950 (6 cyl)

Mark 75,78 & Merc 1000,1100,700 (6cyl), 800 (6cyl), 850 (6cyl),  900 (6cyl), 950 (6cyl)

Water Pump Gasket, lower.  Used on Merc 800 Direct Reversing models.

Mark 75, 75A, 78, 78A, Merc 1000, 600 6 cyl, 650 4 cyl, 700 6 cyl, 800 6 cyl, 850 6 cyl

Merc 800 Direct Reversing and Full Gear Shift Models (Ser.# 1335465 thru 1460998)

Merc 850  (Ser.# 1460999 thru 1464948)