MerCruiser 90577 Distributor Base Housing Only Assembly V6 V8 4.3L 5.0L 5.7L GM Trim Parts This design was replaced with

This design was replaced with 76351A1 which was nearly identical but did not have this metal insert tube

Mercury 25-45253 (x2)

but it could be fully functional

Years:  1979 & Possibly 1990-1993  (and possibly others)

MerCruiser 67504 - Ball Unit Rocker Valve Fulcrum

MerCruiser 90577 Distributor Base Housing Only Assembly V6 V8 4.3L 5.0L 5.7L GM Trim Parts This design was replaced withItem Details For Parts or not Working This is not a complete distributor. This is just the base only Generally found on MerCruiser V6 4. 3L 4. 3LX 4. 3LXH Gen+ 1993 1998 with ignition module mounted to the riser. However, the parts here might have also been used on 350 5. 7L Models 305 5. 0L models as well please check the number stamped in your base and make sure it matches 90577 OEM Assembly Part Number 90747A15 90747A26 (This is just base 90577)