Mercruiser Alpha One Gen 1 Complete Sterndrive / Inboard Outdrive 1.81 Ratio
Replaces Mercruiser 1.81 / 1.84 Ratio
Ships in 2 halves (upper and lower) UPS Ground
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Replaces most Mercruiser Sterndrives from 1974-1990.
Ships in two boxes. Comes with a 9-9/16 new style input yoke.
Does not include Complete Install Kit or Anode Kit. Please see related items below.
Up to 300 HP (SEI does not warranty applications over 300 HP)
Replaces Mercruiser Sterndrive 225-S 1974
Replaces Mercruiser Sterndrive 233 1975-1977
Replaces Mercruiser Sterndrive 250 1977
Replaces Mercruiser Sterndrive 260 1978-1982
Replaces Mercruiser Sterndrive 898/228 1977-1982
Replaces Mercruiser Sterndrive R/MR/Alpha One 1983-1990
Typical Mercruiser Sterndrive engine liter applications from 1983-1990 include 5.7L, 5.0L (4 barrel carb)
Typical Mercruiser Sterndrive engine cubic inch applications from 1983-1990 include 350, 305 (4 barrel carb)
Typical Mercruiser Sterndrive engine horsepower applications include 260, 230, 228