1983 Mercury 115 Compression Numbers

Discussion in 'Bubba's Outboards' started by jdw123, May 31, 2008.

  1. jdw123

    jdw123 New Member

    Messages:
    60
    State:
    texas
    Does anybody know what the compression should be for a 1983 mercury 115? i found one that the guy said was running last year, and now all its doing is just turning over and wont start. how many cranks should it take to get the compression up to where its suppose to be?

    thanks
    jdw
     
  2. Bobpaul

    Bobpaul New Member

    Messages:
    3,039
    State:
    Supply NC
    The compression is there immediately, once the piston passes the exhaust port.

    Not sure about the number, somewhere at or about 115#'s, and all within 10#'s or less.

    Check for spark also.