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Yanmar L70V Engine

The Yanmar L70V is a 0.32 L air-cooled engine rated at 3600 rpm, producing up to 4.8 kW. It powers generator sets from Yanmar, including the YDG3700EV-6El.

Also known as: Yanmar L70V

0.32 L
Displacement
3600 rpm
Rated speed
4 kW
Gross power
On this pageSpecsGenerator setsMaintenanceFAQ

Engine specifications

Displacement0.32 L
AspirationAir-Cooled
Rated speed3600 rpm
Gross power4 kW

Generator sets powered by this engine

1
Yanmar YDG3700EV-6El

This engine also powers 1 machine(s) on Power Equipment Info.

How to read your Yanmar engine serial & model number →

Common problems

5
  • Poor Spray Pattern from Fuel Injection Nozzle
    Fix: Check and Adjust
  • Low Compression
    Cause: Clogged element, Broken element, Defect at element seal portion, Misadjusted, damaged or sticking compression release, Excessive or no clearance, Warped or burned valves, Sticking valve, Gas leak due to worn valve seat, Valve Seat or foreign matter trapped in valve, Excessive end gap or broken piston rings, Damaged, scored, or cracked piston, Excessive wear or scoring cylinder, Bent connecting rod
    Fix: Clean the element, Replace the element, Repair or replace as necessary, Adjust the valve clearance, Replace the intake / exhaust valve, Replace the intake / exhaust valve, Lap the valve seat, Replace piston rings with new, Replace piston with new, Perform honing and use oversized piston and rings, Replace with new
  • Insufficient Poor Engine Air Starting Problem
    Cause: Air in Fuel System, Blocked Air Inlet or Passages, Damaged Cooling Fan, Incorrect Engine Oil, Engine Oil System Leakage, Bell Delivery Capacity of Trochoid, Clogged Engine Oil Filter, Insufficient Engine Oil Level, Too Early Timing of Fuel Injection Pump, Too Late Timing of Fuel Injection Pump, Incorrect Diesel Fuel, Water in Fuel System, Clogged Fuel Filter
    Fix: Clean air intake screen, fan blades, Bleed the Air, Clean or Replace, Add Correct Engine Oil, Check and Adjust, Use Correct Fuel Oil, Drain the Fuel Tank, Clean or Replace Outlet Fuel Filter
  • Exhaust Color
    Cause: Engine Starts Exhaust During Work Soon. D = fc, Exhaust Smoke Sia] 3 =lo|lF#lé 2, Q;}e]9 ce |/S8/# /E}]2]_ o
  • Engine Starts
    Cause: Exhaust During Work Soon. D = fc, Exhaust Smoke Sia] 3 =lo|lF#lé 2, Q;}e]9 ce |/S8/# /E}]2]_ o

Compiled from service & troubleshooting documentation across every generator set that uses the Yanmar L70V.

Maintenance schedule

ItemSpecCapacityPart #Interval
Fuel filterClean or replace the air cleaner element if the air intake restriction exceeds the following specifications: (L48V: 0.10 psi (0.69 kPa; 70 mm Aq) or less), (L100V: 0.21 psi (1.47 kPa; 150 mm Aq) or less), (L70V: 0.20 psi (1.37 kPa; 140 mm Aq) or less).—200 hr
Oil filterClean and inspect the engine oil filter at the same time as changing the engine oil.—200 hr
Battery—
Belt—
Coolant—
Coolant filter—
OilChange the engine oil every 200 hours of operation after the initial change at 50 hours.—200 hr
Spark plug—

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Common questions

What is the displacement of the Yanmar L70V?

The Yanmar L70V has a displacement of 0.32 liters.

Which generators use the Yanmar L70V engine?

The Yanmar L70V powers 1 generator set(s), including Yanmar YDG3700EV-6El.

How often should you change the oil in the Yanmar L70V?

The Yanmar L70V oil change interval is every 200 hours.

What is a common problem with the Yanmar L70V engine?

A commonly reported issue on generators using the Yanmar L70V is: Poor Spray Pattern from Fuel Injection Nozzle. Fix: Check and Adjust.