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  1. M

    BF90D overheating at WOT

    I bought this engine used and have gone through a number of issues, it's a later DK4 engine that was originally NMEA compatible and was converted to older electronics (DK0 or DK2) I have gone though the entire parts list and replaced all the non-compatible parts that were left behind (O2 and oil...
  2. M

    BF90D running issues, surging or stumbling at mid range

    New to me 2017 BF90DK4, starts and runs fine, runs great at WOT around 6,000 rpm, accelerates fine from idle or near idle and from above 4,000 rpm, no hesitation, however at around 2,000 rpm it starts surging, about 10 second intervals it drops about 300 rpm and slowly picks up, holds RPM for...
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