Need the factory operating guidelines for your marine diesel? This 67-page Yanmar 6LPA-STP2, 6LPA-STZP2 operator manual PDF (OEM #0A6LP-G00100) covers daily startup, maintenance intervals, and emergency procedures for your engine. Inside, you get complete electric wiring diagrams for multiple control panel types, detailed piping schematics for fuel and cooling systems, and a full breakdown of periodic inspection items. Open to the maintenance section to find clear service intervals and straightforward troubleshooting charts for simple problems. Replace the engine oil every 125 hours or 6 months, and ensure standard M8 bolts are tightened to exactly 25.5 N-m to prevent vibration issues on the water. Don't get stranded waiting for a tow. Download the bookmarked file, save it to your phone, and keep your vessel running strong.
What's Inside This Yanmar 6LPA-STP2, 6LPA-STZP2 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 4 | - |
| 1. for Safe Operation | 7-10 | Warning Symbols, Safety Precautions, Location of Product Safety Labels |
| Explanation of Product | 11-22 | Use, Driving System, Etc., Engine Specifications, Names of Parts, Major Servicing Parts, Control Equipment |
| Before Operation | 23-30 | Fuel Oil, Lube Oil and Cooling Water, Supplying Fuel (Filling the Fuel Tank, Bleeding the Fuel System), Supplying Engine Lube Oil, Supplying Marine Drive Oil |
| How to Operate | 31-40 | Inspection Before Starting, Checking the Control Panel and Alarm Devices |
| Maintenance & Inspection | 41-53 | Periodic Inspections, Periodic Inspection Items |
| Trouble and Troubleshooting | 54-56 | Simple Problems and the Appropriate Countermeasures, Consulting Your Yanmar Dealer or Distributor |
| System Diagram | 57-61 | Piping Diagram (Fuel Oil, Engine Lube Oil, Cooling Water System), Electric Wiring Diagram |
| Epa Warranty Usa Only | 62-66 | Yanmar Co. |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for standard nuts & bolts (M6X 1.0) | 10.8±1.0 N·m (1.1±0.1 Kgf·m) | p. 41 |
| Tightening torque for standard nuts & bolts (M8X 1.25) | 25.5±2.9 N·m (2.6±0.3 Kgf·m) | p. 41 |
| Fuel filter part number | 119773-55710 | p. 47 |
| Fuel filter tightening torque | 14.7~19.6 N·m (1.5~2.0 kgf·m) | p. 47 |
| Engine oil replacement interval (2nd time & after) | Every 125 hours or 6 months | p. 42 |
| Engine oil filter replacement interval (2nd time & after) | Every 125 hours or 6 months | p. 42 |
| Impeller periodic replacement interval | every 2000 hrs. | p. 52 |
| Fuel injection nozzle cleaning interval | 1500 hours | p. 43 |
| Fuel injection nozzle adjustment interval | 1500 hours | p. 43 |
| Fuel Stop Power at Crankshaft | 232 kW (315 hp) at 3800 rpm | p. 12 |
| Recommended Battery Capacity | 12V x 120Ah | p. 12 |
| Minimum Cetane Fuel Number | 45 | p. 23 |
Yanmar 6LPA-STP2, 6LPA-STZP2 Common Problems This Manual Covers
Yanmar 6LPA-STP2 engine stalls out and refuses to restart after changing the fuel filter p. 47
Bleed air from the fuel lines. Manually tighten the new fuel filter by hand, then apply a tightening torque of 14.7~19.6 N·m as shown on page 47. Prime the system until a solid stream of fuel appears with no bubbles.
Manual Section: Fuel System Alarms and IssuesSudden warning indicator illumination on the dashboard control panel during normal marine operation p. 54
Stop the engine immediately when any indicator lights up. Check the troubleshooting procedures on page 54 to identify the specific alarm. Inspect the alternator V-belt tension and ensure it measures exactly 8-10 mm depression at the center. Verify all fluid levels are full before attempting a restart.
Manual Section: Trouble and TroubleshootingEngine overspeeds rapidly and emits heavy white smoke from the exhaust system p. 42
Shut down the engine immediately to prevent runaway. Check the engine oil level and verify the oil change interval on page 42 has not exceeded 125 hours. Drain excess oil if it is entering the combustion chamber to prevent serious engine damage.
Manual Section: Engine Exhaust Color ProblemsAccelerated engine wear or knocking noises after missing scheduled fluid maintenance intervals p. 44
Drain the crankcase and replace the engine oil and filter. Install a new oil filter and tighten it exactly 3/4 of a turn after hand-tightening, referencing page 44. Repeat this service every 125 hours or 6 months to prevent internal wear.
Manual Section: Maintenance & InspectionFrequently Asked Questions
How do I reset the YANMAR 6LPA-STP2 alarm system?
The alarm buzzer sounds when various alarm lamps come on, but no alarm buzzer will sound when the charge lamp comes on. The buzzer sound can be temporarily turned off using the STOP switch. After the engine starts up, the warning buzzer stops sounding and all warning lamps go off, indicating an automatic reset of the alarm devices.
How do I reset the YANMAR 6LPA-STZP2 warning light?
The warning lamps on the alarm monitor window indicate a problem, but they are designed to go off automatically once the engine starts up and the condition is normal. If the lamps do not go off after starting, it indicates a potential issue that requires inspection.
What do YANMAR 6LPA-STP2 error codes mean?
The YANMAR 6LPA-STP2 engine uses warning lamps with symbols to indicate problems, rather than alphanumeric error codes. These symbols light up in the alarm monitor window to show issues such as Battery Charge, C.W. Temp, L.O. Press. (Engine), C.W. Level, Gear Oil (Stern), Fuel Filter, and Exhaust (C.S.W flow). Each symbol corresponds to a specific abnormality described in the manual.
How do I clear a fault code on a YANMAR 6LPA-STP2?
The YANMAR 6LPA-STP2 uses warning lamps rather than fault codes that require manual clearing. These warning lamps are designed to go off automatically once the engine starts up and the underlying problem is resolved. If the lamps do not go off, it indicates a persistent issue that needs to be addressed.
How will I receive this Yanmar 6LPA-STP2, 6LPA-STZP2 Operator Manual?
This is a 67-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Am I able to print pages from this manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Does this Yanmar 6LPA-STP2, 6LPA-STZP2 Operator Manual have electrical diagrams?
A wiring diagram for the Yanmar 6LPA-STP2, 6LPA-STZP2 electrical system is included.
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