MerCruiser 375HP 4-Stroke Engine Parts

(3 products)

This page focuses on MerCruiser 4‑Stroke 375HP engines and helps you quickly find compatible parts and practical service information. Below you’ll find maintenance tips, commonly replaced parts, and troubleshooting guidance. You can also browse the main MerCruiser collection. Scroll to the bottom of this page to start browsing parts for this engine. On the collection page, use the Filter & Sort controls to narrow results by horsepower, year range, and part category/section.

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How to Identify Your 375HP Model

Locate the engine serial plate: typically on a decal/plate on the engine (top cover or starboard side of the block) and noted in the owner’s pack. The sterndrive (Bravo) has its own serial on the gimbal/drive.
Read the model description: examples include “8.2L Horizon 375 DTS (Bravo)” with suffixes indicating drive type (Alpha/Bravo/MIE), control type (DTS vs. mechanical), and emissions package.
Confirm platform details: 4‑stroke, V8 8.2‑liter EFI with Digital Throttle & Shift (DTS) is common at this power level. Check your serial range to match filters, pumps, sensors, and ignition parts.
Record key specs before ordering: serial number(s), drive family (Bravo I/II/III), fuel delivery (EFI), and any emissions/ECT notes printed on the label.

Engine Overview

MerCruiser 8.2L V8 (approx. 375 HP)

Feature	Description
Configuration	V8 8.2‑liter EFI 4‑stroke gasoline, typically paired with Bravo sterndrive; many variants use DTS (Digital Throttle & Shift).
Common Models	8.2L Horizon 375hp DTS (Bravo). Similar parts also appear on 8.2 MAG variants; always verify by serial number.
Advantages	Strong mid‑range torque, smooth DTS shifting, and robust cooling capacity when raw‑water systems are maintained.
Notes	Filters, anodes, pump impellers, and ignition components can change across serial ranges and drive options—match parts to your exact serial.

Routine Maintenance & Service Parts

Intervals below are general guidelines for 4‑stroke MerCruiser V8s. Always defer to the official service manual and your specific serial number.

Item	Interval*	Remarks	Parts Link
Engine oil + filter	Every 100 hours or annually	Warm engine, drain fully, replace filter; use marine‑grade oil to spec.	MerCruiser Service & Maintenance Kits
Gear oil (sterndrive)	Every 100 hours or annually	Inspect for water intrusion/metal; change more often for heavy use.	Service & Maintenance Kits
Spark plugs	200–300 hours or as needed	Check gap and condition; replace if fouled or worn.	Spark Plugs
Fuel filter / water separator	Every 100 hours or annually	Drain/replace to prevent lean running and hesitation.	MerCruiser Fuel Filters
Raw water pump impeller	Every 2 seasons (or sooner in sandy/silty water)	Key for cooling on raw‑water systems; replace proactively to avoid overheat.	MerCruiser Impellers
Anodes (engine/drive)	Inspect every 50 hours; replace when 50% worn	Choose aluminum/zinc/magnesium based on water type.	MerCruiser Anodes

*Intervals are typical recommendations for many MerCruiser V8 installations; always verify with your engine’s service documentation.

Frequently Used Parts Categories

Routine Service — MerCruiser Service & Maintenance Kits
Cooling System — MerCruiser Impellers
Fuel System — MerCruiser Fuel Filters or MerCruiser Fuel Pumps
Ignition / Electrical — MerCruiser Alternators and Sensors
Gaskets & Sealing — MerCruiser Gaskets
Corrosion Protection — MerCruiser Anodes
Propulsion — MerCruiser Propellers

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Overheat alarm / weak water flow	Inspect raw‑water pump impeller, intake screen, hoses, and thermostat.	Raw‑water pump impeller kit, intake screen, thermostat, hoses
Poor acceleration / power loss	Check fuel filter/water separator, prop condition/pitch, and spark plugs.	Fuel filter, fuel pump, spark plugs, propeller
Hard starting / rough idle	Verify battery voltage/grounds, inspect plugs and ignition leads; check for water in fuel.	Spark plugs, sensors, alternator/charging parts, fuel filter
Gearcase noise / milky or metallic gear oil	Check gear lube level and condition; look for seal leaks and prop shaft fishing line.	Gear lube, lower unit seal kit, propeller hardware

FAQs

Are parts interchangeable between different years or 8.2L variants?

Some are, but many items (filters, sensors, pumps, ignition) vary by serial range, emissions package, and drive family. Always confirm the engine and drive serial numbers before ordering.

When should the impeller be replaced?

Inspect each season and replace about every two seasons—or sooner if operating in sandy/silty water, if there is reduced water flow, or after any overheat event.

How often should sterndrive gear oil be changed?

Typically every 100 hours or annually, and any time contamination (water or metal) is found. Heavy‑use boats may require more frequent changes.

What information helps confirm compatibility?

Provide engine serial number, drive serial number (Bravo model), model description (e.g., 8.2L Horizon 375 DTS), and any emissions/ECT notes. Photos of the nameplate also help.

Ready to find parts matched to your MerCruiser by horsepower, year, and model? Browse the main MerCruiser collection and refine with Filter & Sort.

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If you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.