Thermostat – Fits Mercury Marine 75-175 HP DFI Outboard Motors (Replaces 833072, 833072002, 833072003, 833072004)

Thermostat – Fits Mercury Marine 75-175 HP DFI Outboard Motors (Replaces 833072, 833072002, 833072003, 833072004)

This thermostat is designed for Mercury Marine 75-175 HP DFI 2-Stroke outboards from 1998 and up. It fits 3-cylinder 1.5L engines rated 75-115 HP and V6 2.5L engines rated 135-175 HP.

It serves as a direct replacement for Mercury part numbers 833072, 833072002, 833072003, and 833072004, as well as Sierra 18-3536.

• Includes 1 x Thermostat (833072/833072002/833072003/833072004)
• Installation: Direct Replacement
• Compatible with multiple Mercury Marine 2-Stroke DFI engine models

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here9s a guide to help you identify your engine9s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Thermostat (833072/833072002/833072003/833072004)

Installation Guide

1. Remove the old thermostat from the engine carefully.
2. Clean the thermostat housing and mating surfaces thoroughly.
3. Install a new thermostat seal 27-887978 (not included) on the new thermostat.
4. Place the thermostat into the housing, ensuring proper orientation.
5. Secure the thermostat housing cover and tighten bolts to manufacturer specifications.
6. Refill the cooling system with appropriate coolant if necessary.
7. Start the engine and monitor temperature to verify proper thermostat operation.

Troubleshooting & FAQ

• How do I confirm this fits my engine? Confirm your engine model and year using the compatibility table provided, and refer to the Mercury Serial Number Guide for precise identification.
• What are the differences compared to OEM parts? This listing is an aftermarket replacement part, built to OEM specifications using comparable-grade materials in an ISO9002-certified facility.
• How often should I replace the thermostat? Replacement intervals vary with usage; monitor engine temperature performance and replace the thermostat if overheating or irregular temperature readings occur.
• What are common symptoms of a failing thermostat? Engine overheating, inconsistent temperature gauge readings, or poor engine performance can indicate thermostat failure.
• OEM vs. Aftermarket? This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
• How fast do you ship and how much does it cost? We offer fast global shipping15 days worldwide15 days worldwide15 days worldwide15 days worldwide15 days worldwide-standard shipping is free. Expedited options are available at checkout depending on your location.
• What is your warranty and return policy? This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5 15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.