Yanmar 4-Stroke 195HP Marine Engine Parts

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This page supports Yanmar 4‑Stroke 195HP marine engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance specific to this class of engine. You can also browse the main Yanmar collection. 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 195HP Model

Locate the engine identification plate on the cylinder block or valve cover area; secondary labels may be near the seawater pump or on the flywheel housing.
Read the full model code and serial number. For example, “4LV195” indicates a 4‑cylinder LV‑series rated around 195 HP; suffix characters can denote emission calibration, cooling arrangement, and marine gear option.
Confirm the marine gear model and ratio if applicable; some service parts (mounts, couplings, filters) can vary with gear options.
Distinguish platforms: LV‑series engines are common‑rail 4‑stroke diesels; older 4LHA/4JH variants may use different fuel and filtration components.

Engine Overview

Yanmar 4LV195 Platform

Feature	Description
Configuration	Inline‑4, 4‑stroke diesel, turbocharged and intercooled, common‑rail fuel injection with electronic management
Common Models	4LV150, 4LV195, 4LV230, 4LV250 (many service parts are shared across the LV family; always verify by serial number)
Advantages	Strong low‑to‑mid torque, good fuel economy, reduced noise and vibration vs. older mechanical‑injection designs
Notes	Filter part numbers can vary by build year; maintain clean fuel using primary and secondary filtration; inspect raw‑water pump impeller and heat‑exchanger zincs regularly in saltwater use.

Routine Maintenance & Service Parts

Intervals below are general guidelines for 4‑stroke diesel marine engines. Always follow the official Yanmar service manual for your exact model and serial.

Item	Interval*	Remarks	Parts Link
Engine oil & filter	Every 100 hours or annually	Use marine‑rated oil meeting Yanmar specs; replace filter at each oil change	Yanmar Oil filters
Primary fuel/water separator	Inspect every 50 hours; replace 100 hours/season	Drain water as needed; carry spares onboard	Yanmar Fuel filters
Secondary (engine) fuel filter	Every 200–250 hours or annually	Replace after primary service or if power loss occurs	Yanmar Fuel filters
Raw‑water pump impeller/kit	Annually or 100–200 hours	Replace sooner if overheating or low flow occurs	Impellers
Heat‑exchanger & cooler zinc anodes	Inspect every 50–100 hours; replace as needed	Essential for corrosion protection in salt/brackish water	Anodes
Air filter element	Inspect 100 hours; replace as required	Keep intake clean to protect the turbo and cylinders	Yanmar Air filters
Drive belts	Inspect 100 hours; replace 300–400 hours or if worn	Check tension and replace if cracked or glazed	Belt
Coolant (closed circuit)	Every 2 years (or per manual)	Use approved long‑life coolant and correct concentration	Yanmar
Turbo & charge‑air hoses inspection	Inspect 100 hours; replace if soft, cracked, or oil‑soaked	Boost leaks cause power loss and excess smoke	Hoses

Frequently Used Parts Categories

Routine Service: Yanmar Service & Maintenance Kits
Fuel System: Yanmar Fuel filters
Cooling System: Water pumps
Corrosion Protection: Anodes
Intake & Filtration: Yanmar Air filters
Turbo & Exhaust: Yanmar Turbos
Fuel Injection: Injectors

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
High temperature / overheat alarm	Seawater strainer clean and sealed, intake not blocked, impeller condition, belt tension, coolant level, thermostat operation	Water pump impeller kit, hoses, anodes
Power loss under load	Primary/secondary fuel filters, air filter restriction, boost hose clamps, fuel tank vent, signs of air in fuel	fuel filters, air filter, turbo, hoses
Hard starting / rough idle	Water in separator, clogged fuel filter, air leaks on suction side, sensor connections, battery condition and cranking speed	fuel filters, injectors, sensors
Excessive smoke (white/black/blue)	Fuel quality, filter condition, injector spray, turbo boost leaks, oil level and type	fuel filters, injectors, turbo
Low charging voltage	Belt tension/condition, alternator wiring, ground points, pulley alignment	belt, alternators

FAQs

Are parts interchangeable across 4LV150, 4LV195, 4LV230, and 4LV250?

Many service parts are shared, but filters, belts, sensors, and cooling components can differ by build date and configuration. Always verify by full model and serial number before ordering.

When should the raw‑water impeller be replaced?

As preventative maintenance, replace the impeller annually or every 100–200 hours, sooner if you notice overheat alerts or reduced raw‑water flow.

How often should engine oil be changed?

Typical interval is every 100 hours or annually for recreational use. Shorten intervals for heavy duty or severe environments. Use oil that meets Yanmar specifications.

What information helps confirm part compatibility?

Provide the full engine model (e.g., 4LV195), serial number, and if applicable the marine gear model/ratio. Photos of the nameplate and the part being replaced are also helpful.

Ready to find parts? Browse the main Yanmar collection and narrow by horsepower, year, and model using the Filter & Sort controls.

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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.