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Cummins 6BTA 5.9 Marine Engine Survey x2

Premium Marine Engine Survey
1996 BAYLINER
Twin Cummins 6BTA5.9 Marine Diesel Engines • Hurth Marine Transmissions
Cummins 6BTA5.9
Hurth HSW630-A1
Oil Analysis
Sea Trial


Twin Cummins 6BTA5.9 marine diesel engines during professional marine engine survey inspection by 805 Marine Diesel Mechanic serving Ventura Channel Islands and Santa Barbara harbors


805 Marine Diesel Mechanic professional marine engine survey documentation and certified diesel propulsion inspection reporting Ventura California

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

OFFICIAL#:1061972
LOA:36FT
YEAR:1996 Bayliner

This Cummins 6BTA5.9 marine engine survey documents propulsion-system condition, cooling-system diagnostics, transmission findings, turbocharger observations, sea-trial performance, oil-analysis review, and repair recommendations aboard this 1996 Bayliner vessel.

ENGINE 1

Engine Make: Cummins
Engine Model: 6BTA 5.9-M2
Engine Type: Inboard
Power HP: 250
Fuel Type: Diesel
Hours: 2074
Serial Number: 452602
Engine Location: Port

TRANSMISSION PORT: Hurth Marine Transmission HSW630 A-1

ENGINE 2

Engine Make: Cummins
Engine Model: 6BTA 5.9-M2
Engine Type: Inboard
Power HP: 250
Fuel Type: Diesel
Hours: 2078 on meter. Rebuilt engine 2018 undetermined hours.
Serial Number: 4018419
Engine Location: Starboard

TRANSMISSION STARBOARD: Hurth Marine Transmission HSW630-A1

Engine Room Systems

Fuel Filtration System: Racor Twin Fuel Filter/Water Separator 10 Micron Port & Starboard assemblies appeared serviceable with no water present.
Throttle & Shifter Controls: Morse cable shifters worked properly at flybridge and main cabin locations.
Seawater Pump: Seals not leaking/no water present. Adequate pressure observed.
Tube-Type Heat Exchanger: Inlet and outlet temperatures within parameters.
Engine Oil Cooler: Temperatures within acceptable operating range.
Coolant Level Sensor: Working properly with no leaks observed.
Engine Mounts and Bed: Main engine beds are heavy longitudinal stringers inboard and outboard. Engine mounts satisfactory.
Lube Oil Pressure: WOT engine 100% load measured 51 PSI port engine and 50 PSI starboard engine.
Cooling System Type: Freshwater reservoir cooling with seawater cooled wet exhaust operated satisfactorily.
Seawater Strainers: 2-inch Groco bronze alloy strainers with sight glass appeared serviceable and maintained.
Hoses and Clamps: Double clamped where sighted.
Belts and Pulleys: Belt and pulley condition appeared serviceable.
Engine Alignment: Appeared smooth and without vibration.
Turbochargers: Turbochargers appeared to spool around 1200 RPM and operated satisfactorily.
Hurth Marine Transmissions: Both shifted adequately with no excessive vibration or noise underway.

SEATRIAL REPORT

Inspection Item Observation
Engine Start Engines started without excessive cranking.
Exhaust Appearance Very minimal smoke for engines of this age.
Cooling Water Exhaust Adequate and normal.
Instrumentation All gauges operated within normal operating limits at idle, cruise and WOT.
Steering System Very responsive underway.
Transmission Operation Both shifted smoothly with no excessive noise.
Backdown Test Satisfactory.
Rudder Linkage Operated smoothly underway with no leaks.
WOT Observation Starboard engine produced minor blue/white smoke.

Recommendations and Observations

Port engine turbocharger leaking oil at discharge hose. Both turbochargers operational but should be rebuilt in the near future.
Port and starboard transmissions currently using ATF fluid. Recommend replacing with Delo 30W oil.
Westerbeke generator due for complete service.
Starboard engine alignment concern detected. Recommend replacing rear motor mounts on both engines and realigning shafts.
Starboard engine mixing elbow heavily corroded. Replacement recommended.
Port transmission oil contaminated with water.
Starboard transmission shows excessive wear metals in oil analysis.


Master Marine Diesel Troubleshooting Guide – 805 Marine Diesel Mechanic


Marine transmission oil samples from Hurth HSW630-A1 transmissions showing contamination and discoloration during Cummins 6BTA5.9 marine engine survey inspection

Port transmission discoloration and water contamination identified during oil analysis.


Starboard Cummins 6BTA5.9 exhaust mixing elbow showing severe corrosion buildup requiring replacement during marine engine survey inspection

Starboard engine exhaust mixing elbow showing advanced corrosion.


Original Cummins 6BTA5.9 marine diesel turbochargers requiring rebuild due to age and oil leakage during vessel survey inspection

Original turbochargers on both engines should be rebuilt in the near future.


Oil leakage from Cummins marine turbocharger inlet line observed during detailed propulsion-system survey inspection

Oil leakage observed at turbocharger inlet line.

OIL ANALYSIS REPORT

PORT ENGINE CUMMINS 6BTA 5.9:

TIMEOUT Port Engine

STARBOARD ENGINE CUMMINS 6BTA 5.9:

TIMEOUT Starboard Engine

PORT HURTH TRANSMISSION:

ZF Marine Gear Port

STARBOARD HURTH TRANSMISSION:

ZF Marine Gear Starboard

WESTERBEKE 8KW GENERATOR:

TIMEOUT Westerbeke Generator

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 propulsion systems appear to be well maintained overall with noted repair recommendations.


Cummins 6BTA5.9 marine engine survey condition rating showing GOOD overall propulsion-system condition after professional inspection

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