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Volvo Penta 325HP 4-Stroke Marine Engine Parts

(3 products)

This page is tailored for Volvo Penta 4-Stroke 325HP marine engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Volvo Penta collection for a wider selection. Scroll to the bottom of this page to start browsing parts for this engine, and remember that on the collection page you can use the Filter & Sort controls to narrow results by horsepower, year range, and part category.

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How to Identify Your 325HP Model

  • Locate the identification plate: typically on the engine’s starboard side near the flame arrestor or rocker cover; the transom shield/drive unit also has a product tag with its own serial.
  • Read the full model and serial: note the engine family (e.g., V8 series), fuel system (EFI), and any suffixes that indicate calibration, emissions, or revision.
  • Record the sterndrive type: SX, DPS, or similar. Some parts (anodes, bellows, seals, gearcase items) depend on the drive model, not just engine horsepower.
  • Confirm key specs: shaft ratio and propeller type affect performance parts selection (propellers, anodes style) and should be verified before ordering.

Platform Overview

V8 EFI Gasoline Sterndrive (Approx. 5.7L)

Feature Description
Configuration V8 4-stroke gasoline, EFI/TBI variants, raw- or closed-cooling depending on installation
Common Models V8 EFI families around 300–325 HP; exact calibration varies by year and emissions package
Advantages Strong mid-range torque, broad parts availability, straightforward maintenance
Notes Cooling components and anodes may vary by sterndrive (SX vs. DPS). Match engine serial and drive model when selecting parts.

V8 EFI Gasoline Sterndrive (Approx. 6.0–6.2L)

Feature Description
Configuration V8 4-stroke gasoline, multi-port EFI, electronic ignition, common outputs 300–350+ HP
Common Models Later V8 series around 320–350 HP; verify exact variant by serial and emissions label
Advantages Improved fuel efficiency and diagnostics, strong holeshot and cruise performance
Notes Sensor sets and ECU calibrations differ by year. Match parts by engine serial and model family; propellers must match drive ratio and application.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical marine use. Always follow the official Volvo Penta service manual for your exact model, environment, and duty cycle.

Item Interval* Remarks Parts Link
Engine oil + filter 100 hours or annually Use marine-rated oil; change more often in severe service Oil Filters
Gear oil (sterndrive) 100 hours or annually Inspect for water intrusion/metal; replace seals if contamination is found Volvo Penta Parts
Spark plugs 300 hours or 3 years Gap and heat range per engine label Spark Plugs
Fuel filter / water separator 100 hours or annually Replace sooner if fuel contamination or performance issues occur Volvo Penta Fuel Filters
Raw-water pump impeller / kit Every 2 years or 200 hours Inspect annually; replace immediately if overheated or cracked Volvo Penta Water Pump Repair Kits
Anodes (zinc/aluminum/magnesium) Inspect every 3 months; replace at 50% depletion Choose alloy for your water type (salt, brackish, fresh) Volvo Penta Anodes
Serpentine/accessory belt Inspect each season; replace 2–3 years Replace sooner if glazing, cracking, or squeal occurs Belts
Thermostat Test annually; replace 2–4 years Stuck thermostats cause overheat or cold running Volvo Penta Parts

Frequently Used Parts Categories

Common Symptoms & Quick Checks

Symptom Check First Related Parts
Weak water stream / overheat alarm Inspect seawater intake screen/strainer, hoses, pump impeller, belt, thermostat Water pump repair kit, impeller, thermostat, belts, anodes
Poor acceleration / power loss Check prop condition/pitch, fuel quality and filters, spark plugs, intake restrictions Propeller, fuel filter, spark plugs, sensors
Hard starting / rough idle Verify battery health, starter operation, fuel pressure, vacuum leaks, IAC/MAP Starters, fuel filters, sensors
Gearcase noise / metal in gear oil Check gear oil level/condition, prop shaft for fishing line, seals, gimbal bearing Lower unit seal kit, propeller, bearings

FAQs

Are parts interchangeable between different years or platforms?

Some items carry over, but many vary by engine family, calibration, and sterndrive type. Always match by engine serial and drive model to ensure proper fit.

When should the raw-water pump impeller be replaced?

Inspect annually and replace every 2 years or 200 hours, sooner after any overheat or if blades show set, cracks, or missing material.

How often should sterndrive gear oil be changed?

Typically every 100 hours or once per season. Change immediately if you find water contamination or metallic debris.

What information do you need to confirm part compatibility?

Provide the engine model and serial, sterndrive model/serial (SX/DPS), year range if known, and the specific component you’re replacing.

Ready to find parts by horsepower, year, and model? Browse our main Volvo Penta collection to filter and sort for 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.
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