PCM 4-Stroke 370HP Marine Engine Components

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This page is dedicated to PCM 4‑Stroke 370HP marine engines and helps you quickly find compatible parts and service information. Inside you’ll find maintenance tips, common replacement parts, and troubleshooting guidance specific to this power class. You can also browse our main PCM parts collection to see more categories. Scroll to the bottom to start browsing parts for this engine, and remember you can use the Filter & Sort controls on the collection pages to narrow by horsepower, year range, and part category/section.

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How to Identify Your 370HP Model

Locate the PCM/engine ID plate: commonly on a valve cover, front timing cover, or near the bellhousing. The transmission may also have its own tag.
Record the full model and serial numbers plus rotation (LH standard, RH optional). Rotation is defined from the flywheel end and affects starters, mounts, and some ignition/fuel calibrations.
Confirm installation type: Standard direct-drive vs. V‑Drive. Mounts, brackets, cooler routing, and hose kits can differ by installation.
Cooling configuration matters: Raw‑water only vs. closed‑cooling with heat exchanger. Thermostat, hoses, and anode layouts can vary.

Engine Overview

PCM ZR6 / 6.0L V8 EFI (approx. mid‑2000s and later)

Feature	Description
Configuration	6.0L V8 EFI 4‑Stroke inboard with coil‑on‑plug ignition, serpentine belt drive, and raw‑water pump. Often paired with FCC (Fuel Control Cell) fuel system.
Common Models	PCM ZR6 / MP6.0L variants in ski/wake boats; standard or V‑Drive transmissions (PCM, Hurth/ZF). Left‑hand rotation is standard; right‑hand available on some setups.
Advantages	Strong mid‑range torque, reliable EFI starting, simple raw‑water pump service, robust accessory drive with available 70–100A alternators.
Notes	Follow 160°F thermostat spec, inspect impeller annually, and verify rotation and installation type before ordering mounts, couplers, or exhaust and cooling hardware.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow the schedule and procedures in your official PCM service manual.

Item	Interval*	Remarks	Parts Link
Engine oil + filter	Every 50–100 hours or annually	Use marine‑approved oil meeting PCM specs; change more often in harsh duty.	Oil Filters
Transmission/V‑Drive fluid	Initial 25–50 hours, then every 100 hours/annual	Verify fluid type for your gearbox (PCM/Hurth/ZF) and inspect for debris; service cooler hoses/fittings as needed.	Service & Maintenance Kits
Spark plugs	100 hours or annually	Inspect/replace; check coil boots and plug wires if equipped.	Spark plug
Fuel filter(s) / FCC filter	100 hours or annually	Replace the FCC canister filter and any pre‑filters; check for water or debris.	Fuel Filters
Raw‑water pump impeller/kit	Every season (or 100 hours)	Replace proactively; inspect cam plate, cover, and O‑rings. Carry a spare onboard.	Impellers
Anodes (zincs)	Inspect every 30–60 days; replace as needed	Protects heat exchanger and other components from corrosion; replace when 50% consumed.	Anodes
Serpentine belt	Inspect each service; replace 2–3 seasons or as needed	Look for glazing/cracks; verify tensioner and idlers are smooth and quiet.	Belt
Thermostat & cooling checks	Test annually; replace as required	Verify 160°F spec and proper warm‑up; inspect hoses, clamps, and heat exchanger end caps.	Water pumps

Frequently Used Parts Categories

Routine Service: Service & Maintenance Kits
Cooling System: Impellers, Water pumps, Anodes
Fuel System: Fuel Filters, Fuel Pumps, Injectors
Ignition / Electrical: Sensors, Starters, Alternators
Exhaust System: Manifolds, Elbows
Belts & Drive: Belt, Tensioner Pulley
Gaskets & Seals: Gaskets, Oil Seals

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
High temperature / overheat alarm	Inspect raw‑water strainer and intake; check impeller condition, belt tension, and thermostat; flush heat exchanger.	Impeller kit, water pump, thermostat, anodes, belts, exchanger end caps
Poor acceleration / power loss	Replace FCC fuel filter; verify fuel pressure; inspect spark plugs/coils; check MAP/ECT sensor readings.	Fuel filters, fuel pump, injectors, spark plugs, sensors (MAP/ECT)
Hard starting / rough idle	Check for stale fuel and vacuum leaks; test ECT input; clean throttle body; verify battery voltage and grounds.	Fuel filter, sensors, gasket kits, starter/battery cables
Transmission noise or metal in oil	Inspect fluid level/condition; verify cooler flow; check alignment and mounts; service per OEM spec.	Cooler hoses/fittings, gaskets/seals, mounts

FAQs

Are parts interchangeable between different years or platforms?

Many PCM 6.0L components are shared across multiple years, but installation‑specific pieces (mounts, brackets, harnesses, exhaust, and ECM calibrations) can differ. Always confirm by engine model/serial, rotation, and installation (Standard vs V‑Drive).

When should the raw‑water pump impeller be replaced?

Replace annually or every 100 hours, whichever comes first. Engines that run in sandy/silty or warm waters may require more frequent service. Always carry a spare impeller and O‑rings onboard.

How often should transmission or V‑Drive oil be changed?

Change after the initial break‑in (around 25–50 hours) and then every 100 hours or annually. Use the fluid type specified for your gearbox and inspect the cooler and lines.

What information do you need to confirm part compatibility?

Please provide the PCM engine model and serial number, rotation (LH/RH), installation type (Standard or V‑Drive), and cooling setup (raw‑water vs closed‑cooling). Photos of the nameplate and the part needing replacement are also helpful.

Ready to find the right parts? Browse our main PCM selection by category and use Filter & Sort to narrow by what you need.

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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.