47.9 FT • Twin Cummins QSM11 Marine Diesel Engines • ZF Marine Transmissions
Marine Engine Survey
Conducted by: Jeff Lendall & Sons — 805 Marine Diesel Mechanic
This Cummins QSM11 marine engine survey documents propulsion-system condition, ZF marine transmission performance, cooling-system integrity, drivetrain observations, WOT testing, fuel-system evaluation, and oil-analysis findings for this 47.9FT motor yacht.
Cummins QSM11
ZF Marine
Oil Analysis
Sea Trial
Vessel Identification
| Official Number | 561317 |
|---|---|
| LOA | 47.9 FT |
| Year | 1974 |
ENGINE 1 — PORT
Engine Make: Cummins
Engine Model: QSM11
Engine Type: Inboard
Power HP: 715
Fuel Type: Diesel
Hours: 2506
Serial Number: 45605902
Engine Location: Port
Transmission Port: ZF Marine Transmission 1RM310-PL
ENGINE 2 — STARBOARD
Engine Make: Cummins
Engine Model: QSM11
Engine Type: Inboard
Power HP: 715
Fuel Type: Diesel
Hours: 2509
Serial Number: 45605564
Engine Location: Starboard
Transmission Starboard: ZF Marine Transmission 1RM320-PL
Engine Room Systems Inspection
Sea Trial Report
| Sea Trial Item | Observation |
|---|---|
| Engine Start | Engines started without excessive cranking. |
| Exhaust Appearance | Very minimal smoke observed for engines of this age. |
| Cooling Water Exhaust | Cooling-water discharge appeared adequate and normal. |
| Engine Instruments | Engine instrumentation operated within normal limits at idle, cruise, and WOT. |
| Steering System | Steering system operated normally and was highly responsive. |
| Throttle Operation | Throttle response normal with no adjustments required. |
| Transmission Operation | Both transmissions shifted smoothly with no excessive noise. |
| Backdown Test | Backdown test satisfactory. |
| Rudder Linkage | Rudder linkage operated smoothly underway with no leaks detected. |
WOT TEST:
Wide-open throttle testing revealed slight smoke from the starboard engine during initial acceleration that cleared once engine operating temperature stabilized.
Engine Oil Analysis
CLEONE — Starboard Engine Oil Analysis
CLEONE — Port Engine Oil Analysis
The following laboratory reports provide oil-condition monitoring, wear-metal trends, contamination analysis, and predictive maintenance insight for both Cummins QSM11 propulsion engines.
Master Marine Diesel Troubleshooting Guide – 805 Marine Diesel Mechanic
Cummins QSM11 Marine Engine Survey Summary
As a result of this Marine Engine Survey, operational testing, cooling-system evaluation, drivetrain inspection, and sea-trial observations, the overall propulsion package appears mechanically sound and well maintained.
OVERALL ENGINE RATING: GOOD
The engine room and propulsion systems appeared clean, organized, and professionally maintained overall.
Cummins QSM11 Marine Engine Survey by 805 Marine Diesel Mechanic
A targeted Cummins QSM11 marine engine survey delivers model-specific diagnostics capable of identifying hidden defects before they become major repair issues. This inspection process provides owners with investment protection, insurance documentation, predictive maintenance guidance, and increased resale confidence.
Recommended QSM11 Maintenance Schedule
| Interval | Service Action | Reason |
|---|---|---|
| 100 Hours | Change engine oil and replace filters | Preserve lubrication and remove contaminants |
| 250 Hours | Flush and refill cooling system | Prevent corrosion and maintain cooling efficiency |
| 500 Hours | Inspect fuel injectors and fuel lines | Maintain clean combustion and reliable fuel delivery |
| Annually | Perform complete QSM11 marine engine survey | Identify hidden wear and verify overall propulsion-system condition |
805 Marine Diesel Mechanic provides mobile marine diesel diagnostics, cooling-system service, oil analysis, fuel-system troubleshooting, and marine engine surveys throughout Ventura Harbor, Channel Islands Harbor, Oxnard, and Santa Barbara.
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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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