Call (805) 774-0637

Lugger L6125A Marine Engine Survey

LUGGER 6125A Marine Engine Survey

 

805 marine diesel mechanic logo

50ft Grand Banks Marine Engine Survey

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

 

 

     

                   HIN/IMO: 116E595 OFFICIAL#: 1031921 LOA: 50.5FT YEAR: 1995

ENGINE 1:

 

ENGINE 2:

 



GENERATOR 1:



 




FUEL FILTRATION SYSTEM: Racor Twin Turbine Series Fuel Filter/Water Seperator 10 Micron Port & Starboard side filter assembly: Appeared serviceable, No water present.


THROTTLE & SHIFTER CONTROLS: Glendinning hydraulic shifters worked properly at flybridge and Main cabin locations.


GEAR-DRIVEN SEAWATER PUMP WITH BRONZE IMPELLER: Seals not leaking/no water present


PLATE-TYPE HEAT EXCHANGER: checked inlet and outlet flow temperature, within parameters


ENGINE OIL COOLER: checked inlet and outlet temperatures, all within parameters


ENGINE MOUNTED FUEL COOLER: checked inlet and outlet temperatures, all within parameters


SEAWATER PUMP OUTLET PRESSURE: adequate pressure


WATER-IN-FUEL DETECTION SWITCH: sensor working properly


COOLANT LEVEL SENSOR: working properly


ENGINE MOUNTS AND BED:  Main engine beds are heavy longitudinal stringers inboard and outboard. Engine Mounts Satisfactory


LUBRICATION: Oil Level indication is normal both port and starboard.


LUBE OIL PRESSURE: (WOT) engine 100% load 40psi. Starboard pressure gauge not reading properly at cabin.


COOLING SYSTEM TYPE: Freshwater reservoir type cooling with Seawater cooled wet exhaust, Operated satisfactory.


SEAWATER STRAINERS: 2 2.5inch Groco bronze alloy with sight glass. Appeared serviceable. well maintained


COOLANT LEVEL: Normal levels observed. Pressurized expansion tanks on both engines to 25psi no noticeable drop in pressure. used heat sensing gun on all cooling system surfaces. operated normal.


HOSES AND CLAMPS: Double clamped where sighted. All quality 304 SS style hose clamps. Cooling system, Transmission & oil system hoses, in need of replacement at next service.


BELTS AND PULLEYS: Belts & Pulleys condition appeared serviceable, port side alignment is off, repair at next service


SEACOCKS AND STRAINERS: Seawater seacocks were ball valve type. Operated smooth & satisfactory. 


EXHAUST SYSTEM: Seawater cooled with risers and flexible coupling sections double clamped where sighted. port side leaking at fiberglass elbow, recommend replacing with SS elbow


ENGINE ALARMS: Test of port and starboard low oil pressure alarm, water in fuel alarm and coolant overheat warning audible at helm station. Operated satisfactory.


ENGINE SHUT DOWN: Port and starboard shut down push buttons at helm station & main cabin clearly marked. Operated satisfactory.


STUFFING BOXES: Packing gland style, both leaking at correct rate.


EMERGENCY SHUT-DOWNS. Port & Starboard Engine equipped appeared to work properly


ENGINE ALIGNMENT: Appeared Smooth & without vibration.


RUDDERS: Packing gland style, not leaking appeared serviceable. no vibration.


TURBOCHARGERS: Turbo boost pressure maxed out at 48psi while performing (WOT) wide open throttle test, kicked in at 1300rpm and everything runs smooth. recently new.


——————————————————————————————-


SEATRIAL REPORT:


1. The engines started without excessive cranking.


2. The engine exhaust appeared normal.


3. The cooling water exhaust appeared adequate and normal.


4. The engine instruments operate within normal operating limits at idle, cruising speed and at wide open throttle. except starboard oil pressure gauge.


5. The steering system operated normally. very responsive.


6. The throttles operated normally.


7. The transmissions, both went in & out of gear smooth with no excessive noise, no leaks detected from any of the seals on both


8. The backdown test was satisfactory.


9. both rudder linkage operated smooth while underway, no leaks detected


10. OIL LEAKS detected at port exhaust manifold, #4 port injector nozzle, port exhaust elbow, port & starboard seawater pumps, generator fuel lines & water temperature sensor


11. Bow thruster had excessive growth (mussels & barnacles) seemed to spin freely buy hand, but by the end of day was not working at all, maybe bad motor or an electrical issue.


12. Port & Starboard bearing assembly moving while shifting, needs larger bolts installed.


13. Port & Starboard seawater pumps leaking at weep holes, need to be replaced.


14. Coolant filters bypassed port & starboard L6125A need to be reconnected into the coolant system. and coolant system flushed and refilled.


15. Port & Starboard alternator pully out of alignment, needs to be readjusted.


WOT TEST: (wide open throttle) sea trial test for 3 minutes, Starboard engine smoking a little (white) could be faulty (clogged) injectors. recommend shocking the fuel system with LUCAS Injector cleaner. as soon as we throttled back the smoke went away. other than that, everything performed within parameters.

   
OIL ANALYSIS PORT ENGINE:
Port Engine Oil L6125A
Port Transmission Oil
Port Engine Coolant

OIL ANALYSIS STARBOARD ENGINE:  
Starboard Engine Oil L6125A
Starboard Transmission Oil
Starboard Engine Coolant


OIL ANALYSIS GENSET:
Genset Northern Lights 20KW Oil
Genset Northern Lights 20KW Coolant




 


MARINE ENGINE SURVEY SUMMARY:


As a result of my investigation, MARINE ENGINE SURVEY, and by virtue of my experience, my opinion is OVERALL ENGINE RATING:  GOOD: the engine room and engines appear to be well maintained.


marine engine survey rating


 


 cracked transmission hose


Cracked Transmission oil line


 


Leaking Exhaust Manifold Leaking Exhaust Manifold


 


port side belts out of Alignment


Port side belts out of alignment


 


bearing housing loose


Bearing housing loose


 


Generator water temperature sensor leaking


Generator water temperature sensor leaking


 


[videopress 15jtpO6s]


Port Side #4 Injector Leaking


 


Estimate to repair/replace faulty items



Guesstimate on parts and labor without pricing out all the materials = $23,425.00


 




Lugger L6125A Marine Engine Pre-Purchase Survey by 805 Marine Diesel Mechanic


















Considering a yacht powered by a Lugger L6125A marine diesel engine can be exhilarating, but undiscovered engine issues can translate into costly downtime. 


This pre-purchase survey guide delivers precise insights on why specialized inspections matter, how the multi-step process uncovers hidden wear, how to interpret your survey report, why 805 Marine Diesel Mechanic stands out, and what investment to expect. 


Whether you’re negotiating a sale or ensuring yacht reliability, this article equips you with essential knowledge from experienced boat mechanics and yacht mechanics.


















Why Is a Specialized Lugger L6125A Marine Engine Survey Essential?


















A specialized survey for the Lugger L6125A analyzes engine condition through detailed inspections to identify hidden wear, ensuring vessel safety and performance. Generic engine checks often overlook model-specific stress points, increasing the chance of fuel system failures or cooling inefficiencies. Conducting a tailored inspection empowers buyers with negotiating leverage, minimizes surprise repairs, and promotes long-term reliability.


















What Unique Features Make the Lugger L6125A Engine Require Expert Inspection?


















The Lugger L6125A features a robust six-cylinder block and turbocharged induction that demands precise evaluation of its cooling, fuel, and exhaust circuits. Common challenges include uneven cylinder wear from hours of high-load operation, turbocharger shaft play, and raw-water corrosion in heat exchangers. Recognizing these engine-specific characteristics prevents overlooking early signs of fatigue and aligns inspection thresholds with manufacturer tolerances.


















How Does a Pre-Purchase Survey Protect Buyers and Ensure Vessel Reliability?


















A pre-purchase survey mitigates buyer risk by exposing potential failures before closing the deal, promoting informed negotiations and uninterrupted cruising. By quantifying compression variances, fluid contamination, and exhaust back-pressure, the survey pinpoints components nearing service limits. This proactive approach bolsters confidence in vessel performance and safeguards against unbudgeted repair costs.


















What Does the Comprehensive Lugger L6125A Survey Process Include?


















A comprehensive survey process encompasses historical review, thorough visual checks, computerized diagnostics, sea trials, and a detailed report to guide maintenance decisions. Each phase builds on the previous one, creating a complete picture of engine health before purchase.


















How Is Engine History and Specification Reviewed Before Inspection?


















Before launching physical checks, our team verifies all service records and manufacturer specifications to align inspection criteria.





















Reviewing these details sets a clear baseline for the hands-on evaluation and informs targeted diagnostic tests.


















What Are the Key Components Checked During the Visual Inspection?


















Our visual survey inspects all critical service points for corrosion, leaks, and structural integrity.





















This inspection reveals external deterioration that often precedes internal damage and leads into diagnostic testing.


















Which Diagnostic Tests Are Performed to Detect Hidden Engine Issues?


















Our computerized and fluid analysis tests reveal the engine’s internal health through quantifiable metrics:














Test




Purpose




Insight








Cylinder Compression




Measures sealing and wear




Identifies low-pressure cylinders








Crankcase Pressure




Detects blow-by and seal integrity




Indicates ring or gasket failure








Exhaust Back-Pressure




Assesses exhaust system restriction




Reveals clogged manifold or turbo








Oil & Coolant Analysis




Evaluates contamination and additives




Shows bearing wear or coolant leak














Data-driven model for marine engine fault diagnosis using in-cylinder pressure signals




This academic paper explores data-driven models for effective marine engine fault diagnosis, focusing on identifying critical faults and quantifying their severity. It discusses the use of in-cylinder pressure signals and regression techniques to estimate fault severity, contributing to cost-effective diagnostic methods and predictive maintenance.






This research supports the article’s discussion of computerized diagnostics and fluid analysis tests, particularly the focus on quantifiable metrics and identifying internal wear and contamination for precise repair recommendations.
















How Is the Sea Trial Conducted to Assess Engine Performance Under Load?


















During a Wide Open Throttle (WOT) run and sustained cruising RPM, we measure key performance parameters.





















Sea trials confirm real-world performance and detect issues that static tests cannot reproduce, closing the loop on full-system evaluation.








 
















The Art of the Engine Survey






This article emphasizes the critical role of thorough marine engine surveys, detailing essential components like sea trials, compression tests for engines with significant hours, and monitoring exhaust system back pressure. It highlights that skilled technicians with the right tools are crucial for ensuring an engine is in proper working order.






This source directly supports the article’s emphasis on comprehensive survey processes, including sea trials, compression tests, and exhaust back-pressure checks, and the need for experienced technicians.
















What Information Is Provided in the Post-Survey Report and Recommendations?


















The post-survey report compiles findings, photographs, test data, and prioritized recommendations with cost estimates. Buyers receive:





















This comprehensive document serves as both a negotiation tool and a maintenance roadmap.


















How Can Buyers Understand and Use Their Lugger L6125A Engine Survey Report?


















Interpreting the report correctly differentiates urgent repairs from routine upkeep, enabling strategic decision-making. Critical findings signal worn bearings or gasket failures, while routine maintenance items include belt replacements and filter services. Understanding this distinction guides budget allocation and prevents neglect of high-risk components.


















What Are the Critical Findings Versus Routine Maintenance Items?


















Critical findings often involve component failures that directly risk engine operation, such as:






    

  1. 

    Low compression in one cylinder indicating seal leaks
    

    2. 

  2. 

    High crankcase pressure signaling ring degradation
    

    3. 

  3. 

    Exhaust back-pressure above spec from manifold restrictions
    

    4. 

















Routine items include scheduled oil changes, raw-water pump impeller replacements, and belt tension checks, which support long-term engine health and flow smoothly into prioritization.


















How Should Buyers Prioritize Repairs Based on Survey Recommendations?


















Buyers should address safety and operational risks first, then schedule preventive tasks in descending order of impact:







		
				

			Tagged , , , , , , 		

			


	


			

			One Response		


		
		
    
					
  1. 
			
    
				Pingback: Perkins Marine Diesel Engine M92B Specifications - mechanic 			
    
		
    2.