Mercury & Mariner 1991-2005 2.5L 150-200 HP Carb & EFI Outboard Powerhead Parts Diagrams

This page offers a comprehensive selection of high-quality replacement parts for Mercury & Mariner 2.5L V6 outboard engines, rated 150–200 HP, covering both carbureted and EFI models produced between 1991 and 2005. Whether you're performing a rebuild or routine maintenance, you'll find OEM-equivalent gasket sets (tailored to 1991, 1992–1999, 2000+, EFI/Carb distinctions), carburetor repair kits, fuel pump kits, and full internal engine components, including rod bearings, main bearings, wrist pin bearings, rod bolts, and crankshaft seal kits. The page also includes exploded diagrams to help identify accurate parts and assist in ordering.

The diagram above is for a Mercury & Mariner Powerhead for V6 150-200 HP 2.5L Carb/EFI models from 1991 to 2005. The following parts correspond to the numbers on this diagram:

1. Thermostat
2. Head Gasket
• 150/175 HP, 1991 (w/dowel pins)
• 175-200 HP, XR6, 150EFI, 1992-1999
• Cylinder Head O-Ring Kit, 2000 & Up (not pictured)

We recommend the following kits for this powerhead:

• Gasket Set
• 1991 only
• 1992-1999
• Carb, 2000 & up/EFI, 2000-2001
• 2002 & up
• Carburetor Kit
• 1991-1995
• 1996-2003
• Fuel Pump Kit

The diagram above is for a Mercury/Mariner Crankshaft Assembly for V6 150-200 HP 2.5L Carb/EFI models from 1991 to 2005. The following parts correspond to the numbers on this diagram:

1. Rod Bearing
2. Wrist Pin Bearings
3. Center Main Bearing
4. Upper Main Bearing
5. Lower Main Bearing
6. Rod Bolt
7. Connecting Rod

Although not numbered on the diagram, the following items are available for purchase:

• Crankshaft Seal Kit