Twin Lugger L6125A marine diesel engines installed in 50ft Grand Banks yacht during premium marine engine survey inspection

Premium Marine Engine Survey
50FT GRAND BANKS

Twin Lugger L6125A Marine Diesel Engines • 1995 • 50.5FT

Marine Engine Survey

Conducted by: Jeff Lendall & Sons — 805 Marine Diesel Mechanic

Comprehensive marine engine survey performed on twin Lugger L6125A marine diesel engines, ZF marine transmissions, Northern Lights generator system, drivetrain assemblies, cooling systems, fuel systems, exhaust systems, and operational sea-trial performance.

805 Marine Diesel Mechanic official marine survey and diesel diagnostics logo

Lugger L6125A
ZF Marine
Northern Lights
Sea Trial

Vessel Identification

HIN / IMO 116E595
Official Number 1031921
LOA 50.5FT
Year 1995

ENGINE 1 — PORT

Engine Make: Lugger
Engine Model: L6125A
Engine Type: Inboard
Power HP: 490
Fuel Type: Diesel
Hours: 3356
Serial Number: TPJ00575
Engine Location: Port

Transmission Port: ZF Marine Transmission ZF1RM310-PL

ENGINE 2 — STARBOARD

Engine Make: Lugger
Engine Model: L6125A
Engine Type: Inboard
Power HP: 490
Fuel Type: Diesel
Hours: 3335
Serial Number: TPJ00574
Engine Location: Starboard

Transmission Starboard: ZF Marine Transmission ZF1RM310-PL

Generator System

Generator Make: Northern Lights
Generator Model: M844L-20KW
Generator KW: 20
Serial Number: G190612415

Engine Room Systems Inspection

Fuel Filtration System: Racor Twin Turbine fuel filtration assemblies appeared serviceable with no water contamination present.
Throttle & Shifter Controls: Glendinning hydraulic controls operated properly from flybridge and main cabin.
Gear-Driven Seawater Pumps: No water leakage observed from pump seals during inspection.
Plate-Type Heat Exchanger: Inlet and outlet temperatures remained within operating specifications.
Engine Oil Coolers: Temperature testing showed normal operation.
Engine Mounted Fuel Coolers: All temperatures within acceptable range.
Seawater Pump Outlet Pressure: Adequate pressure observed during testing.
Water-In-Fuel Detection Switch: Sensor operating correctly.
Coolant Level Sensors: Working properly.
Engine Mounts and Beds: Longitudinal stringers and engine mounts appeared satisfactory.
Lubrication: Oil levels normal on both engines.
Lube Oil Pressure: WOT oil pressure approximately 40 PSI. Starboard cabin oil-pressure gauge not reading properly.
Cooling System Type: Freshwater reservoir system with seawater-cooled wet exhaust operated satisfactorily.
Seawater Strainers: Groco bronze-alloy strainers appeared well maintained and serviceable.
Coolant Level: Expansion tanks pressure-tested to 25 PSI with no noticeable pressure drop.
Hoses and Clamps: Double-clamped quality stainless hose clamps installed. Cooling-system, transmission, and oil-system hoses should be replaced at next service interval.
Belts and Pulleys: Belt condition satisfactory overall. Port-side pulley alignment incorrect and requires adjustment.
Seacocks and Strainers: Ball-valve seacocks operated smoothly and satisfactorily.
Exhaust System: Wet exhaust system operational. Port-side fiberglass exhaust elbow leaking and should be replaced with stainless steel elbow.
Engine Alarms: Oil pressure, water-in-fuel, and coolant overheat alarms operated properly.
Engine Shutdown: Port and starboard emergency shutdown systems functioned correctly.
Stuffing Boxes: Packing-gland style stuffing boxes leaking at acceptable rate.
Emergency Shutdowns: Systems appeared operational and functional.
Engine Alignment: Alignment appeared smooth with no abnormal vibration.
Rudders: Rudder packing glands appeared serviceable with no vibration.
Turbochargers: Turbo boost reached approximately 48 PSI during WOT testing and operated smoothly. Turbochargers recently replaced.

Sea Trial Report

Sea Trial Item Observation
Engine Starting Engines started without excessive cranking.
Exhaust Appearance Engine exhaust appeared normal overall.
Cooling Water Exhaust Cooling-water discharge appeared adequate and normal.
Instrumentation All gauges normal except starboard oil-pressure gauge.
Steering System Steering responsive and operating normally.
Throttle Operation Throttle controls operated properly.
Transmission Operation Both transmissions shifted smoothly with no excessive noise or seal leaks.
Backdown Test Backdown test satisfactory.
Rudder Linkage Rudder linkage smooth underway with no leaks detected.

Sea Trial Deficiencies Observed:

  • Oil leaks detected at port exhaust manifold, #4 port injector nozzle, seawater pumps, generator fuel lines, and generator temperature sensor.
  • Bow thruster heavily fouled with marine growth and became inoperable by end of inspection.
  • Port and starboard bearing assemblies moving while shifting and require larger mounting bolts.
  • Port and starboard seawater pumps leaking at weep holes.
  • Coolant filters bypassed on both Lugger engines and require reconnection.
  • Port and starboard alternator pulleys out of alignment.

WOT TEST:
Starboard engine produced slight white smoke during three-minute WOT run. Smoke disappeared once throttled back. Possible injector restriction noted. Fuel-system treatment with Lucas injector cleaner recommended.

Marine Engine Survey Summary

As a result of this marine engine survey, drivetrain inspection, cooling-system evaluation, operational sea-trial testing, and by virtue of experience, the overall propulsion package appears generally well maintained for age and hours.

OVERALL ENGINE RATING: GOOD

Marine engine survey propulsion system rating meter showing GOOD overall engine condition

Cracked transmission oil hose discovered during Lugger marine transmission inspection on Grand Banks yacht

Cracked transmission oil line.

Leaking Lugger L6125A exhaust manifold during marine diesel engine inspection

Leaking exhaust manifold.

Port-side alternator belts and pulleys out of alignment on Lugger L6125A marine engine

Port-side belts out of alignment.

Loose shaft bearing housing assembly observed during marine drivetrain inspection

Bearing housing loose and requiring refastening.

Northern Lights generator water temperature sensor leaking coolant during generator inspection

Generator water temperature sensor leaking.

Port Side #4 Injector Leaking

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Estimate to Repair / Replace Faulty Items

Repair Item Estimated Cost
Starboard oil-pressure gauge repair $150
Replace cooling-system hoses and clamps (3 engines) $4,000
Replace stainless exhaust elbows, hoses, and clamps $4,700
Replace transmission oil hoses $700
Refasten shaft bearing housings $500
Repair port exhaust manifold leak $500
Repair port injector leak $300
Replace port and starboard seawater pumps $3,300
Alternator pulley alignment correction $350
Repair generator fuel-line leaks $200
Repair generator temperature-sensor leak $75
Bow thruster diagnosis / repair $5,000–$7,000
Reconnect coolant filters into cooling system $400
Flush and refill coolant systems $1,300

Estimated Parts & Labor Guesstimate:
Approximately $23,425

NOTICE:

The following statements limit the liability of the undersigned and set ethical standards associated with this report. Use of this report for any purpose constitutes acceptance of the following:

NOTE A:
This report is issued without prejudice and is the property of the Requestor as listed above. Any use or distribution by another party is prohibited and shall render this report invalid.

NOTE B:
This report is issued subject to the understanding that the undersigned surveyor is not responsible for error, omission, negligence, or misstatement. This report is a statement of opinion based on conditions observed at the time of inspection. It is not a warranty expressed or implied. This inspection is valid for the inspection date only as vessel conditions in a saltwater environment may deteriorate rapidly. Condition is regarded as good or better unless otherwise stated herein.

Survey Conducted By

Owner / Surveyor: Jeff Lendall

Jeff Lendall & Sons
805 Marine Diesel Mechanic

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