Yanmar 310HP 4-Stroke Marine Engine Parts

(0 products)

This page is for Yanmar 4-Stroke 310HP marine engines. Use it to find compatible parts, routine service information, and troubleshooting guidance. You’ll also find maintenance tips, common replacement items, and links to parts categories. Prefer to browse everything? Visit the main Yanmar collection. When you’re ready, scroll to the bottom of this page to start browsing parts for this engine, and remember you can use the Filter & Sort controls on the collection page to narrow by horsepower, year range, and part category.

Browse All Yanmar Parts

How to Identify Your 310HP Model

Nameplate/serial plate: Typically riveted to the engine block or rocker cover; on sterndrive packages there may also be an ID plate on the transom bracket or drive.
Model code and suffix: Yanmar model codes often include displacement and configuration; suffixes may indicate emissions tier, cooling package, or drive pairing (e.g., inboard vs sterndrive).
Fuel system cues: Common-rail engines use an ECU and rail-mounted injectors; earlier mechanical-injection platforms have an inline or rotary injection pump.
Cooling and drive differences: Raw-water cooled vs heat‑exchanger systems require different impellers/anodes; sterndrive packages add gear oil service and drive anodes.

Platform Overview

Inline‑6 Turbo Diesel (300–315 HP class)

Feature	Description
Configuration	Inline‑6, turbocharged/intercooled 4‑stroke diesel; mechanical or electronically assisted fuel control depending on variant.
Common Models	310–315 HP class inline‑6 marine diesel packages (inboard or paired with sterndrive).
Advantages	Proven reliability, compact packaging, widely available service parts (filters, belts, impellers, anodes).
Notes	Follow raw‑water pump and heat‑exchanger service intervals closely; many maintenance parts are shared across close HP variants.

V8 Common‑Rail Diesel (320 HP class)

Feature	Description
Configuration	V8, common‑rail 4‑stroke diesel with ECU control; turbocharged and intercooled.
Common Models	High‑output V8 marine diesel packages around 320 HP, available in inboard and sterndrive configurations.
Advantages	Strong torque and smooth operation; advanced diagnostics via ECU sensors.
Notes	Use correct service filters for common‑rail systems; keep electrical/sensor connections clean and protected.

Routine Maintenance & Service Parts

Intervals below are typical guidelines for marine diesels; always follow your engine’s official service manual and operating profile.

Item	Interval*	Remarks	Parts Link
Engine oil + filter	Every 100–150 hours or annually	Use marine‑rated oil meeting Yanmar specs; change filter with each oil service.	Yanmar Oil Filters
Primary fuel/water separator	Inspect every 50 hours; replace 100–200 hours	Drain water frequently; replace element at least once per season.	Yanmar Fuel Filters
On‑engine secondary fuel filter	100–200 hours or annually	Essential for common‑rail protection; pre‑fill only as recommended.	Yanmar Fuel Filters
Raw‑water pump impeller	200 hours or every 1–2 seasons	Replace proactively; inspect cover plate and wear surfaces.	Water Pump Impeller Rebuild Kits
Heat‑exchanger/engine anodes	Inspect 50 hours; replace as needed	Shorten interval in warm/brackish water; replace when >50% depleted.	Anodes
Air filter	Inspect 50 hours; replace 200–300 hours	Keep intake restriction low for best turbo response.	Yanmar Air Filters
Drive belt(s)	Inspect 50 hours; replace 200–400 hours	Check tension and condition; replace if cracked or glazed.	Belts
Sterndrive gear oil (if equipped)	Every 100 hours or annually	Change more often if water ingress or metal found; pressure‑test seals if contaminated.	Lower Unit Seal Kits

*Intervals vary by model, hours, and duty cycle. Always verify in your official Yanmar service literature.

Frequently Used Parts Categories

Routine Service: Yanmar Service & Maintenance Kits
Fuel System: Yanmar Fuel Filters
Lubrication: Yanmar Oil Filters
Cooling System: Water Pump Impeller Kits
Corrosion Protection: Anodes
Air & Intake: Yanmar Air Filters
Exhaust Components: Yanmar Elbows

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak discharge / overheat alarm	Raw‑water strainer blockage, impeller wear, intake screen fouling, loose belts	Water pump impeller kit, anodes, belts
Poor acceleration or power loss	Clogged fuel filters, air in fuel, boost leaks, restricted air filter	Fuel filters, air filter, hoses/clamps
Hard starting / rough idle	Battery state, fuel quality, water in separator, sensor connections	Fuel/water separator element, sensors, starter
Gearcase noise (sterndrive)	Gear oil level/condition, water intrusion, prop entanglement	Lower unit seal kit, anodes

FAQs

Are parts interchangeable between different years or platforms?

Many service parts cross between close HP variants, but platform changes (e.g., mechanical injection vs common‑rail, inline‑6 vs V8) can alter filters, sensors, and cooling components. Always verify by model code and serial.

When should I replace the raw‑water impeller?

Inspect every 100–200 hours and replace at least every 1–2 seasons. Replace immediately if blades are cracked, set, or missing.

How often should sterndrive gear oil be changed?

Typically every 100 hours or annually. If you see water contamination or metal fines, change immediately and pressure‑test the drive for seal integrity.

What information helps confirm compatibility?

Provide the full engine model code, serial number, drive type (inboard or sterndrive), and photos of the nameplate and the part being replaced.

Ready to find parts for your Yanmar 4‑Stroke 310HP engine? Browse the main Yanmar collection and use the filters to narrow by horsepower, model, and category.

Shop Yanmar 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.