3 documentsEngine & Drivetrain
Marine Engine & Drivetrain Logs
The engine room, in records. Diesel baselines and trend logs, shaft alignment and runout, raw water cooling, heat exchange and exhaust. Built around engine hours rather than dates, because that is how marine machinery actually wears.
- pages in all
- 120
- live fields
- 2,646
- models
- 18
- each
- $97
Every log in this category works the same way. You transcribe the figures for your own installation once, onto a reference page: your manual's temperatures, your gearbox maker's coupling tolerance, your impeller interval. From then on, every reading you take is measured against your own machinery and against your own commissioning baseline, rather than against a range written for somebody else's engine.
None of these documents publishes a tolerance, a temperature or a service interval of its own, and none instructs you to carry out work that belongs to a qualified engineer. They record what was measured, by whom, at how many hours, and how far it has moved since.
Guides
Guides for this system
Engine and drivetrain
An engine's history is written in small changes. Somebody has to write them down. Three records, covering the three places a marine diesel installation actually goes wrong.
A reading is a state. A series is a trajectory.
One temperature tells you what is happening now. The same temperature, at the same load, recorded across a season, tells you what is going to happen. Every experienced engineer knows this and almost no owner has the series, because the first reading was never written down.
The obstacle is not discipline, it is the reference. What counts as normal for your engine is in your manual, in the revision matching your serial number, not in a table written for somebody else's block. Transcribe yours once, log against it after that.
The baseline and trend logA coupling gap measured once is an impression
Measured in four quadrants, twice a season, it is a trend. Misalignment is one of the few faults that destroys three components in sequence, gearbox then cutless bearing then stern tube, quietly, over two seasons, while the boat still runs.
It is also one of the few you can catch with a feeler gauge and a record. The figures belong to your installer and your gearbox manual. What belongs to you is the sequence of measurements that shows something moved.
The alignment and shaft recordThe two systems that fail quietly, then all at once
A fouling heat exchanger sets off no alarm until the day it does. An exhaust elbow corrodes from the inside, where nothing can see it. Neither degrades in a way you notice from the helm.
What makes them tractable is that both leave a trail: impeller condition at each change, anode consumption between haul-outs, what the elbow looked like when it was last opened and who opened it. A trail is only a trail if somebody wrote it down at the time.
The cooling and exhaust recordWhere to start, by your situation
A boat you have just bought, or an engine with no history. The Baseline and Trend Log. A baseline can only be taken once and you are standing at the moment to take it.
A cruising season ahead, away from yards. The same log, started before you leave. Offshore, a trend is worth most when it is read early, while you can still do something about it.
A vibration, or a gearbox and bearing replaced sooner than they should have been. The Drivetrain Record.
Overheating you cannot explain, or a haul-out booked. The Cooling and Exhaust Record.
What you will not find in any of them
No oil pressure limit. No exhaust gas temperature. No coupling tolerance, no runout figure, no torque. No service interval in hours or in months.
Not one published threshold, tolerance, rate or service life, here or anywhere else in this catalogue. Those figures exist, and they belong to your manufacturer's documentation in the revision matching your serial number, to the professional who worked on your boat, and to your own installation. A document that prints them has copied somebody else's equipment and handed you the risk.
Every register here opens the same way. A reference page where you transcribe your own figures, with the source document and its revision beside each line. A commissioning baseline. Then a deviation log measured against both. The models do the arithmetic from there.
That is not a limitation we apologise for. It is the product.