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Volvo Penta 4-Stroke 155HP Marine Engine Parts

(7 products)

This page is tailored for Volvo Penta 4-Stroke 155HP marine engines. Use it to find compatible parts and practical service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse our 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 by horsepower, year range, and part category.

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How to Identify Your 155HP Model

  • Find the data/serial plate on the engine (often on the valve cover, rocker cover bracket, or starboard side of the block). For sterndrive setups, also note the serial on the transom shield/drive.
  • Read the full model code and suffix. These typically indicate fuel system (carb/EFI), emission tier, and drive variant. The serial ensures correct parts for your exact build.
  • Distinguish gasoline vs diesel: gasoline engines have spark plugs and ignition coils; diesels have injectors and a glow/starting aid system. Redline on the tachometer can also be a clue.
  • Record engine serial, drive serial (if applicable), and any accessory kit numbers to confirm compatibility before ordering.

Engine Platform Overview

Inline 4-Cylinder Gasoline, 4‑Stroke (Approx. 140–170 HP Class)

Feature Description
Configuration Inline-4 4-stroke gasoline, carbureted or EFI, typically paired with a sterndrive.
Common Models Gasoline 4‑cyl sterndrive engines in the ~155 HP range.
Advantages Simple to service, good fuel economy for day cruising, broad parts availability.
Notes Match ignition, fuel, and cooling parts to serial and fuel system (carb vs EFI). Drive and transom shield serials affect gearcase/prop parts.

Small Diesel Marine Drive, 4‑Stroke (Approx. 150–170 HP Class)

Feature Description
Configuration 4‑stroke diesel (inline‑4/inline‑5), common‑rail or mechanical injection, sterndrive or inboard.
Common Models Diesel marine engines in the ~155–170 HP range.
Advantages Strong torque, excellent efficiency, long service life.
Notes Fuel filtration and cooling components are model/serial specific. Verify engine and drive serials for exact kit selection.

Routine Maintenance & Service Parts

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

Item Interval* Remarks Parts Link
Engine oil + filter (4‑stroke) Every 100 hours or annually Use marine‑rated 4‑stroke oil; warm engine before draining for best results. Oil Filters
Gear oil (sterndrive) / transmission fluid Every 100 hours or annually Inspect for water intrusion and metal fines; replace seals if contamination is found. Volvo Penta Lower Unit Seal Kits
Spark plugs (gasoline) Inspect every 100 hours; replace 100–200 hours Confirm correct heat range and gap for your model/serial. Spark Plugs
Fuel filter / water separator Every 100 hours or annually Drain bowl regularly; replace sooner if contaminated fuel is suspected. Volvo Penta Fuel Filters
Raw water pump impeller / kit Every 1–2 seasons or 100–200 hours Replace sooner if weak tell‑tale, overheat alarm, or vane set is aged/hardened. Volvo Penta Water Pump Repair Kits
Anodes (zinc/aluminum/magnesium) Inspect monthly; replace when >50% depleted Match alloy to water type (salt, brackish, fresh) to prevent corrosion. Volvo Penta Anodes
Drive / accessory belt(s) Every 200 hours or 2 years Check tension and cracking; replace if noisy or glazed. Belts
Engine air filter (if equipped) Inspect every 100 hours; replace as needed Ensure unobstructed intake for proper mixture and performance. Volvo Penta Air Filters
Thermostat Every 2 years or if temperature is unstable Replace if over‑cooling or overheat occurs after basic checks. Volvo Penta Parts

Frequently Used Parts Categories

Common Symptoms & Quick Checks

Symptom Check First Related Parts
Weak water stream or overheat alarm Inspect intake screens, raw water strainer, and impeller; verify thermostat operation and belt condition. Water pump repair kit, thermostat, intake screen/strainer, belt, anodes.
Poor acceleration or power loss Check fuel/water separator and fine filter, prop condition/pitch, spark plugs (gasoline) or injector performance (diesel). Fuel filters, spark plugs (gas), injectors (diesel), propeller.
Hard starting or rough idle Confirm battery voltage and cranking speed, inspect plugs/ignition (gasoline), look for vacuum/air leaks; for diesel, check glow system. Starter, spark plugs/ignition parts (gas), fuel filters, hoses, glow components (diesel).
Gearcase noise or metal in gear oil Verify correct gear lube level/condition; inspect prop shaft for fishing line; look for leaking seals. Lower unit seal kit, propeller hardware, gear lube.
Battery not charging Check belt tension/alignment and alternator output; inspect wiring and grounds. Alternator, belt, wiring/terminals.

FAQs

Are parts interchangeable between different years or platforms?

Some service items are shared, but many components depend on engine serial, fuel system (carb/EFI or diesel injection), and drive model. Always verify with your engine and drive serial numbers.

When should the raw water pump impeller be replaced?

As a rule of thumb, replace every 1–2 seasons or 100–200 hours, sooner if you see weak flow, high temperature, or vanes set from storage.

How often should gear oil be changed?

Change sterndrive gear lube at least annually or every 100 hours. If the oil appears milky or metallic, address seals and internal wear before continued use.

What information do you need to confirm part compatibility?

Please provide engine serial number, full model designation, and (for sterndrives) the drive and transom shield serials. Photos of the nameplate and the part to be replaced are very helpful.

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

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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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