MerCruiser 470 Cylinder Head 966-6187A4 4cyl 488 3.7L 170hp 165HP 190hp 1976-89 Transom Plate Should be MerCruiser 59974 or

Should be MerCruiser 59974 or MerCruiser 815575 (if you remove the baffle) and possibly OMC 986073 / 0986073

1986 models had a different style of gear housing with a lip on the bottom

Bolt: 10-816601 (4)

This was used on 1974-1994 Various 35hp

MerCruiser 470 Cylinder Head 966-6187A4 4cyl 488 3.7L 170hp 165HP 190hp 1976-89 Transom Plate Should be MerCruiser 59974 orItem Details MerCruiser 966 6187A4 Cylinder Head Assembly (D3VE A2A) Freshwater used part Good Condition, Original Paint Valves are still installed, You will need to install appropriate rocker hardware. 996 6187A4 Generally Found on all "470" models 1976 1989 (Specifically 1976 1984 but I don't think there were any major changes and all of the part numbers supersede) 170hp (2 BBL.) MERCURY 224 I L4 1985 1986 165hp (2 BBL.) MERCURY 224 I L4 1987 3. 7L