Mercury & Mariner 1983-1990 150 XR4, 175, 200 HP 2.4L Outboard Powerhead Parts Diagrams

This page offers in-depth parts diagrams and comprehensive repair parts for the Mercury & Mariner V6 2.4L 150 XR4 175–200 HP powerhead from model years 1983 to 1990. You’ll find labeled diagrams for both the powerhead and crankshaft assemblies, complete with key numbered parts, such as thermostats, head gaskets, rod bearings, wrist pin bearings, and lower main bearings. Recommended repair kits include OEM-compatible gasket sets (150XR4, 175 HP 1985–1990; 200 HP 1983–1990), fuel-pump kits with inline check valves (1986–1990), and carburetor overhaul kits. Whether you're doing a complete rebuild or searching for a specific component, this page ensures you have a detailed view and the right parts for restoring engine performance

The diagram above is for a Mercury/Mariner Powerhead used in V6 2.4L 150XR4 and 175/200 HP models from 1983 to 1990. The following parts correspond to the numbers on this diagram:

1. Thermostat
2. Head Gasket

We recommend the following kits for this powerhead:

• Gasket Set
• 150XR4, 175 HP, 1985-1990
• 200 HP, 1983-1990
• Fuel Pump Kit
• In-Line Check Valve
• 1986-1990
• Carburetor Kit

The diagram above is for a Mercury/Mariner Crankshaft Assembly for V6 2.4L 150XR4 175/200 HP models from 1983-1990. The following parts correspond to the numbers on this diagram:

1. Rod Bearing
2. Wrist Pin Bearings
3. Lower Main Bearing
4. Rod Bolt

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

• Crankshaft Seal Kit