MerCruiser Alpha One R/MR 59830A1 U-Joint Yoke Outdrive Upper 83-90 Stern Drive Timing Cover Roughly 1965 to the early

Roughly 1965 to the early 1970's

Also found on some newer (1980's-1990's) GM 4cyl 2

5L from the 1970-1982 time period where it used the type of exhaust manifold where it had the aluminum cover mount for the carburetor)

1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1998

May Work On These Years:   1994 1995 1996 1997 1998

MerCruiser Alpha One R/MR 59830A1 U-Joint Yoke Outdrive Upper 83-90 Stern Drive Timing Cover Roughly 1965 to the earlyItem Details & Compatibility This is a Yoke Assembly for alpha one R MR Alpha One Gen I (1983 1990) Also this would be compatible with 1971 1982 V8 305 350 Stern Drives that required the longer edition yoke (4cyl & 6cyl engines from that time 71' 82' used what was called a "short yoke") The yoke style was used in the years described above regardless of engine gear ratio of outdrive. I. E. 120hp 2. 5L 140hp 3. 0L 165hp 4. 1L, 470 165hp 3. 7L 4cyl 4. 3L