Volvo Penta D4 D6 Impeller Kit 3808857 (145-7533) - Fits Stern Drive Engines

(0 products)

This page is dedicated to Volvo Penta D4/D6 diesel sterndrive engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, commonly replaced parts, and troubleshooting guidance. You can also browse the main Volvo Penta collection. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the “Filter & Sort” controls to narrow results by horsepower, year range, and part category.

Browse All Volvo Penta Parts

How to Identify Your Volvo Penta D4/D6 Model

Locate the engine identification plate on the top/front of the engine block and the transom shield or drive unit plate for Aquamatic sterndrives. Record the engine model (e.g., D4-300, D6-370) and serial number.
Read the full model code and suffix (e.g., D4-300A, D6-370D). Suffix letters often indicate revision level, emissions stage, or ancillary differences that affect parts selection.
Distinguish platforms: D4 is an inline-4 common-rail turbodiesel; D6 is an inline-6 common-rail turbodiesel. Many cooling and fuel components are platform-specific.
Confirm drive type (Aquamatic sterndrive vs inboard) because raw-water pumps, anodes, and gearcase components can differ by installation.

Platform Overview

D4 Platform (Inline-4 Diesel)

Feature	Description
Configuration	Inline-4, 4-stroke common-rail turbodiesel for Aquamatic sterndrive or inboard installations.
Common Models	Examples include D4-225, D4-260, D4-300 (various revision letters A–G across years).
Advantages	Strong mid-range torque, efficient fuel burn, compact package for twin installations.
Notes	Raw-water pump and anodes are service-critical; some parts differ by revision letter and drive ratio—verify by serial.

D6 Platform (Inline-6 Diesel)

Feature	Description
Configuration	Inline-6, 4-stroke common-rail turbodiesel, widely used on Aquamatic sterndrives and inboards.
Common Models	Examples include D6-280, D6-330, D6-370, D6-400, D6-435, D6-480 (various revision letters).
Advantages	High output with broad torque curve; robust cooling and charging systems for heavy-duty use.
Notes	Impeller kits, anodes, and fuel filtration components are service items; some parts vary by model year and installation—check serial.

Routine Maintenance & Service Parts

Intervals below are general guidelines for diesel sterndrives. Always follow the official Volvo Penta service manual for your exact model, hours, and operating conditions.

Item	Interval*	Remarks	Parts Link
Engine oil & oil filter	Every 100–200 hours or annually	Use marine‑approved diesel engine oil; replace filter at each oil change.	Oil Filters
Drive gear oil (Aquamatic)	Every 100 hours or annually	Inspect for water intrusion; replace sealing washers as needed.	Volvo Penta Parts
Primary/secondary fuel filters	Every 200 hours or annually	Replace both filters; prime system and check for air leaks after service.	Volvo Penta Fuel Filters
Raw water pump impeller / kit	Every 1–2 seasons (or 200–300 hours)	Replace proactively; inspect pump cam/wear plate and cover for scoring.	Volvo Penta Water Pump Repair Kits
Anodes (engine & drive)	Every 50–100 hours; replace when 50% depleted	Match anode material (zinc/aluminum/magnesium) to your water type.	Volvo Penta Anodes
Air filter / intake service	Inspect every 100 hours	Replace if restricted; check for debris/salt accumulation in intake path.	Volvo Penta Air Filters
Serpentine belt (drive belt)	Inspect every 100 hours; replace 2–3 years	Look for cracks, glazing, or fraying; verify tensioner operation.	Belts

*Intervals vary by model year and duty cycle; consult your service manual.

Frequently Used Parts Categories

Routine Service – Volvo Penta Service & Maintenance Kits
Cooling System – Volvo Penta Water Pumps
Fuel System – Volvo Penta Fuel Filters
Impellers – Volvo Penta Impellers
Corrosion Protection – Volvo Penta Anodes
Electrical & Sensors – Volvo Penta Sensors
Propulsion & Props – Volvo Penta Propellers

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Overheat alarm / weak discharge	Inspect seawater intake screens, hoses, and raw-water pump impeller; verify heat exchanger cleanliness.	Water pump repair kit, impeller, thermostat, intake screen, anodes
Poor acceleration / power loss	Check fuel filters for restriction, air leaks on suction side, and turbo/charge-air hoses for leaks.	Fuel filters, sensors (MAP/boost), turbo gasket set, hoses
Hard starting / rough idle	Verify fuel prime, water-in-fuel, and glow plug/relay operation; confirm battery and starter performance.	Fuel filters, sensors, starter, glow plug relay
Gearcase noise or metallic oil	Check drive oil level/condition; inspect for water intrusion and sealing washer condition.	Lower unit seal kit, gear lube, drain/fill gaskets

FAQs

Are D4 and D6 parts interchangeable across all years?

Many items are platform-specific, and revisions (A, B, C, etc.) or installation type (sterndrive vs inboard) can change part selection. Always confirm by engine model and serial number before ordering.

When should I replace the raw-water impeller?

For reliability, replace every 1–2 seasons or 200–300 hours, and sooner if you encounter overheating, low flow, or if the pump was run dry. Inspect the pump housing and wear components during each impeller service.

How often should I change Aquamatic drive gear oil?

As a rule of thumb, service annually or every 100 hours. If the oil appears milky or metallic, service immediately and inspect seals and bearings.

What information helps confirm part compatibility?

Provide the full engine model (e.g., D4-300A), serial number, drive model, and a photo of the raw-water pump or the part you’re replacing. This ensures the correct kit or component is selected.

Ready to find parts? Browse the main Volvo Penta collection by model and category to locate components for your D4/D6.

Shop Volvo Penta Parts

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.