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Blocks & Covers 4cyl

  • Block - Merc 40 CI - NOS - NEW
    $500.00 Block - Merc 40 CI - NOS - NEW
    NOS Mercury 40ci Block - NEW.  Block assembly # 349.  All blocks are measured with a Sunnen Bore Gauge System. STD bore is 2.441. Exact bore sizes compared to 2.441 are as follows:#1 TDC...

  • Block Merc 500 44ci NOS #831-5347A3
    $500.00 Block Merc 500 44ci NOS #831-5347A3
    Mercury 500 Block 44 ci.  NOS  Off set spark plugs.  Part number 831-5347A3.  I have other 4 cylinder Mercury blocks, 30-40-44ci that I have not checked out yet.  So, if you need a block, inquire...