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  1. C

    One Piece riser / manifold

    Any known problems with mercruiser one piece riser manifolds? I had them replaced and both 4.3L engines have failed due to water ingestion in under 100 hours of use in saltwater.
  2. C

    Water in the Oil / crankcase

    I have 1999 Rinker 280 Fiesta Vee w/ twin 4.3L carbureted Mercruisers - raw water cooled and the engines have one pcs riser-manifolds. The boat is and has been used in salt water. I purchased the vessel used in the beginning of the 2003 season from a person I know, and whom I believe took very...
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