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Blocks & Covers 4cyl

  • 1012-2077A1 Rear Block Cover, 4 Cyl  Mercury 650  NEW  NOS
  • 1100-2988A1 Upper Bearing Cap - NOS
    $75.00 1100-2988A1 Upper Bearing Cap - NOS
    Upper Bearing Cap for Mercury 40-44 CI, 4 cylinder.  NOS Part number 1100-2988A1.  2 Available

  • 24003 Timing Case Cover MK40H MK40
    $95.00 24003 Timing Case Cover MK40H MK40
    From a MK40H motor, serial #825758.  MK40 & MK40H only.  No cracks or welds.  Nice used condition.

  • 24003 Timing Cover MK40 - Used
  • 500-1030A1 Center Main Bearing Housing
    $25.00 500-1030A1 Center Main Bearing Housing
    500-1030A1 Center Main Bearing Housing.  Early style as used on MK30-55-58's.  Can also be used on Merc 300-350-400-450 & 500 non-CDI blocks.  6 Available

  • Block - Mark 55 40ci  4 Cylinder
    $250.00 Block - Mark 55 40ci 4 Cylinder
    Merc Mark 55 40ci 4 cylinder block.  #895125.  This is a super clean block.  No salt, no broken off bolts, no paint, no grease and grime here.  Even has 55H powerhead studs.  It is bore .015 and is...

  • 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...

  • Center Main Bearing Housing - 4cyl
    $45.00 Center Main Bearing Housing - 4cyl
    Center Main Bearing Housing as used on MK30-30H, MK55-55H.  Good used condition.

  • Center Main Bearing Housing Merc 300-350-400-450-500
    $25.00 Center Main Bearing Housing Merc 300-350-400-450-500
    Center Main Bearing Housing Merc 300-350-400-450, early 500's.  Can also be used on MK30-55-58's.  Good used condition.  6 Available

  • Exhaust Cover - Merc 500 BC-61
    $25.00 Exhaust Cover - Merc 500 BC-61
    Exhaust Cover - Merc 500. Common to many 50HP Merc Models. Has long been NLA. Very useable with some elbow grease. Not for late model blocks with CDI ignition.  1 Available

  • Lower Bearing Caps - Mercury BC-106
    $25.00 Lower Bearing Caps - Mercury BC-106
    Lower Bearing Caps - Mercury. 2 seal type as used on Merc 300-350-400-500 non CDI blocks and MK58's. The MK30-55's used a one seal type, this 2 seal type can be used on the MK30-55's.  2 Available