{"title":"Marine Engine \u0026 Drivetrain Logs","description":"\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eEvery log in this category works the same way. You transcribe the figures for your own installation once — your manual's temperatures, your gearbox maker's coupling tolerance, your impeller interval — onto a reference page. 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.\u003c\/p\u003e\u003cp\u003eNone 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.\u003c\/p\u003e","products":[{"product_id":"marine-diesel-baseline-trend-log-pdf","title":"Marine Diesel Baseline \u0026 Trend Log PDF — Reference, Baseline \u0026 Deviation Record","description":"\u003cp style=\"font-size:1.05em;line-height:1.7;\"\u003e\u003cstrong\u003eEvery published table of “normal” engine readings was written for somebody else's engine.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eOil pressure alarm points, coolant limits, exhaust gas temperatures and wear limits differ between manufacturers, between models from the same manufacturer, and between two installations of the same engine. A figure that is right for a Yanmar 4JH is wrong for a Volvo D2, and both are wrong for whatever is in your engine bay unless somebody checked.\u003c\/p\u003e\n\n\u003cp\u003eSo this log is built the other way round. You transcribe your own engine's figures from your own manual, once, onto a reference page. You record one full set of readings while the engine is in a state you are willing to call good. Every entry after that measures itself against both.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#0A3F5C;border-left:4px solid #C5A059;border-radius:4px;padding:22px 24px;margin:26px 0;color:#F7F9FA;\"\u003e\n  \u003cp style=\"margin:0 0 4px;font-size:0.72em;letter-spacing:0.14em;text-transform:uppercase;color:#C5A059;font-weight:700;\"\u003eWhat you receive\u003c\/p\u003e\n  \u003cp style=\"margin:0 0 14px;font-size:1.25em;line-height:1.35;color:#FFFFFF;\"\u003eA seven-part record for the life of the engine\u003c\/p\u003e\n  \u003cul style=\"margin:0;padding-left:18px;line-height:1.75;color:#DCE6EC;\"\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 28-line reference page\u003c\/strong\u003e for the figures and intervals you transcribe, with the manual page recorded beside each\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eAn 8-line alarm register\u003c\/strong\u003e comparing the manual's set points against what is actually fitted to your panel\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA commissioning baseline\u003c\/strong\u003e over six RPM steps, with the conditions that make it comparable\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003e16 trend entries plus 4 full sweeps\u003c\/strong\u003e — two minutes at cruise, every time you use the boat\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eFault code and event registers\u003c\/strong\u003e, including the codes that cleared themselves\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003e6 calculation models\u003c\/strong\u003e for deviation, drift rate, heat exchanger differential and interval consumed\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eA reading is a moment. A trend is a warning.\u003c\/h3\u003e\n\u003cp\u003eA coolant temperature that sits inside a generic band tells you very little. The same temperature, eight per cent above where your own engine ran at the same revs two hundred hours ago, tells you something is happening.\u003c\/p\u003e\n\u003cp\u003eThat is why the hours column is not optional and why the RPM must be the same every time. Model M3 turns two entries and the hours between them into a rate of drift — which is the difference between a logbook and a prediction.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#F7F9FA;border:1px solid #E1E8EC;border-left:4px solid #A2803C;border-radius:4px;padding:20px 22px;margin:26px 0;\"\u003e\n  \u003cp style=\"margin:0 0 6px;color:#0A3F5C;font-weight:700;\"\u003eNot one published threshold. Deliberately.\u003c\/p\u003e\n  \u003cp style=\"margin:0;line-height:1.7;\"\u003eYou will not find a normal range, a wear limit or a service interval of our own anywhere in this document. An owner who reads “low oil pressure below 2.0 bar” in a general guide, on an engine whose maker alarms at 2.8, keeps running an engine that should be stopped. An owner who reads “over 95 °C is critical”, on an engine that runs normally at 92, shuts down his propulsion mid-passage. Both errors come from a number written for a different engine. This log removes the number and keeps the arithmetic.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWhat it is worth to a buyer, a surveyor and an insurer\u003c\/h3\u003e\n\u003cp\u003eAn engine with a completed log of this kind is a different proposition from an engine with a shoebox of receipts. It shows the intervals were kept against the manufacturer's own figures, it shows what drifted and when, and it shows which faults appeared and how they were resolved.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWho it is for\u003c\/h3\u003e\n\u003cul style=\"line-height:1.75;\"\u003e\n  \u003cli\u003eOwners who have just bought and want a baseline before anything drifts\u003c\/li\u003e\n  \u003cli\u003eOwners who inherited an engine with no history and need to start one\u003c\/li\u003e\n  \u003cli\u003eAnyone planning a passage where the engine matters more than usual\u003c\/li\u003e\n  \u003cli\u003eOwners preparing to sell, who want the engine to speak for itself\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eTechnical specification\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:0.95em;margin:12px 0 4px;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;width:42%;\"\u003eProduct ID\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eAML-MECH-2026-01\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eExtent\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e26 pages · 7 parts · 6 calculation models\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eRegister lines\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e142 across reference, baseline, trend, events and service\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eInteractivity\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e906 live PDF form fields — 64 tick boxes and 842 entry fields\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eFormats included\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eA4 and US Letter, both fillable and print-ready\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eEngines\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eAny marine diesel — the document carries no engine-specific data\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eUnits\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eUnit-neutral — you set them and record which you used\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eOffline\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eNo app, no account, no connection required once downloaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWhat it is not\u003c\/h3\u003e\n\u003cp\u003eThis document records, structures and compares figures that you supply. It publishes no threshold, no normal range and no limit, and it reaches no conclusion about any engine or installation. It is not a service manual and not engineering advice. It is not prepared by a qualified marine engineer and does not substitute for one.\u003c\/p\u003e\n\u003cp\u003eWhere a reading matters, the decision belongs to a qualified engineer working from the manufacturer's documentation for your serial number. Nothing here instructs you to run, load, dismantle or adjust an engine.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:26px;\"\u003e\u003cstrong style=\"color:#0A3F5C;\"\u003eInstant download.\u003c\/strong\u003e Your links appear on screen the moment payment clears, and arrive by email within a minute. They do not expire.\u003c\/p\u003e\n\n\u003cp style=\"font-size:0.9em;color:#5C6B75;line-height:1.65;margin-top:22px;border-top:1px solid #E1E8EC;padding-top:16px;\"\u003e\u003cem\u003e2026 Captain's Edition · Revision 1.0 · AML-MECH-2026-01. Apex Marine Labs designs the organisational process behind good seamanship. Our documents record and organise; they do not replace a certified marine survey, a service manual, or a qualified marine engineer.\u003c\/em\u003e\u003c\/p\u003e","brand":"Apex Marine Labs","offers":[{"title":"2026 Captain's Edition","offer_id":56013836517544,"sku":"AML-MECH-2026-01","price":97.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/1161\/2072\/files\/apex-diesel-baseline-log-01-cover.webp?v=1789746400"},{"product_id":"drivetrain-alignment-shaft-record-pdf","title":"Drivetrain Alignment \u0026 Shaft Record PDF — Coupling, Runout \u0026 Stern Gear Log","description":"\u003cp style=\"font-size:1.05em;line-height:1.7;\"\u003e\u003cstrong\u003eA misaligned drivetrain destroys a gearbox, a cutless bearing and a stern tube — in that order, quietly, over two seasons.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIt is also one of the few faults on a boat that leaves a paper trail if anyone bothers to keep one. A coupling gap measured at four quadrants, dated, with the hours and the conditions beside it, tells you whether the shaft line has moved. The same measurement taken once and remembered vaguely tells you nothing at all.\u003c\/p\u003e\n\n\u003cp\u003eThis is that record. A reference page you fill in from your own documentation, then measurement sessions kept across years, with a column in every one of them for who held the gauge.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#0A3F5C;border-left:4px solid #C5A059;border-radius:4px;padding:22px 24px;margin:26px 0;color:#F7F9FA;\"\u003e\n  \u003cp style=\"margin:0 0 4px;font-size:0.72em;letter-spacing:0.14em;text-transform:uppercase;color:#C5A059;font-weight:700;\"\u003eWhat you receive\u003c\/p\u003e\n  \u003cp style=\"margin:0 0 14px;font-size:1.25em;line-height:1.35;color:#FFFFFF;\"\u003eA seven-part record for the life of the drivetrain\u003c\/p\u003e\n  \u003cul style=\"margin:0;padding-left:18px;line-height:1.75;color:#DCE6EC;\"\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 22-line reference page\u003c\/strong\u003e for the tolerances, torques and specifications you transcribe, with the source and page beside each\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 16-line preparation page\u003c\/strong\u003e — afloat or ashore, settling time, tankage, mast, temperature: the conditions that decide whether two sessions can be compared\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eSix four-quadrant coupling sessions\u003c\/strong\u003e with both variances computed, never an average\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eShaft runout and flange metrology\u003c\/strong\u003e — TIR, face runout, spigot concentricity, with the angular position of the high point\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eCutless bearing play over eight sessions\u003c\/strong\u003e, with the method recorded, because push-pull and dial indicator do not agree\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eSix calculation models\u003c\/strong\u003e for TIR, quadrant variance, angular misalignment, parallel offset, deviation and wear rate\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eYou measure. Your yard adjusts.\u003c\/h3\u003e\n\u003cp\u003eReading a dial indicator and slipping feeler gauges into a coupling gap are within reach of a careful owner. Adjusting an alignment is not: it means jacking engine mounts against a shaft line, it is easy to make worse, and the cost of getting it wrong is a gearbox.\u003c\/p\u003e\n\u003cp\u003eSo this document is built to sit on both sides of that line. It records what you measured and what your yard measured, with the name in every session. Used before a lift, it tells your engineer exactly where to look. Used after, it proves what changed — and the vibration page, recorded at the same RPM before and after, lets the work be judged on something other than an invoice.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#F7F9FA;border:1px solid #E1E8EC;border-left:4px solid #A2803C;border-radius:4px;padding:20px 22px;margin:26px 0;\"\u003e\n  \u003cp style=\"margin:0 0 6px;color:#0A3F5C;font-weight:700;\"\u003eNot one published tolerance. Deliberately.\u003c\/p\u003e\n  \u003cp style=\"margin:0;line-height:1.7;\"\u003eYou will not find a runout limit, a bearing play figure or a torque value of our own anywhere in this document. They differ between builders, between shaft diameters, between bearing types and between gearbox models. A runout limit in thousandths of an inch and one in hundredths of a millimetre are easy to confuse under an engine, and the confusion costs a gearbox. Transcribe yours from your own documentation onto the reference page, record the document, and let model D5 do the comparison.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eTwo variances, never an average\u003c\/h3\u003e\n\u003cp\u003eA drivetrain can sit comfortably inside tolerance on the vertical axis and outside it on the horizontal. Averaging four coupling gaps into one number hides exactly that, which is why this record asks for all four and computes both variances separately — then converts them into an angle and a parallel offset, because angular misalignment and parallel offset are different faults with different causes.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWho it is for\u003c\/h3\u003e\n\u003cul style=\"line-height:1.75;\"\u003e\n  \u003cli\u003eOwners who have just had an alignment done and want it documented properly\u003c\/li\u003e\n  \u003cli\u003eOwners chasing a vibration nobody can pin down\u003c\/li\u003e\n  \u003cli\u003eAnyone tracking cutless bearing play towards a planned lift rather than an unplanned one\u003c\/li\u003e\n  \u003cli\u003eBuyers and sellers who want the drivetrain history to be more than a verbal assurance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eTechnical specification\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:0.95em;margin:12px 0 4px;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;width:42%;\"\u003eProduct ID\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eAML-MECH-2026-02\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eExtent\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e24 pages · 7 parts · 6 calculation models\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eRegister lines\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e109 across reference, preparation, measurement, stern gear and work\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eInteractivity\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e518 live PDF form fields — 54 tick boxes and 464 entry fields\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eFormats included\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eA4 and US Letter, both fillable and print-ready\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eInstallations\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eShaft drive, any diameter — the document carries no installation-specific data\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eUnits\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eUnit-neutral — you set them and record which you used\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eOffline\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eNo app, no account, no connection required once downloaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWhat it is not\u003c\/h3\u003e\n\u003cp\u003eThis document records, structures and compares measurements that you or your engineer take. It publishes no tolerance, no wear limit and no torque figure, and it reaches no conclusion about any installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlignment adjustment is not an owner task.\u003c\/strong\u003e Nothing in this document instructs you to slacken, jack or adjust an engine mount, to move a shaft line, or to dismantle any part of a drivetrain. Where a reading falls outside the limit you transcribed, the next step belongs to a qualified marine engineer working from the builder's own procedure for your installation.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:26px;\"\u003e\u003cstrong style=\"color:#0A3F5C;\"\u003eInstant download.\u003c\/strong\u003e Your links appear on screen the moment payment clears, and arrive by email within a minute. They do not expire.\u003c\/p\u003e\n\n\u003cp style=\"font-size:0.9em;color:#5C6B75;line-height:1.65;margin-top:22px;border-top:1px solid #E1E8EC;padding-top:16px;\"\u003e\u003cem\u003e2026 Captain's Edition · Revision 1.0 · AML-MECH-2026-02. Apex Marine Labs designs the organisational process behind good seamanship. Our documents record and organise; they do not replace a certified marine survey, a service manual, or a qualified marine engineer.\u003c\/em\u003e\u003c\/p\u003e","brand":"Apex Marine Labs","offers":[{"title":"2026 Captain's Edition","offer_id":56014076575912,"sku":"AML-MECH-2026-02","price":97.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/1161\/2072\/files\/apex-drivetrain-record-01-cover.webp?v=1789747403"},{"product_id":"cooling-exhaust-service-record-pdf","title":"Cooling \u0026 Exhaust Service Record PDF — Raw Water, Heat Exchange \u0026 Exhaust Log","description":"\u003cp style=\"font-size:1.05em;line-height:1.7;\"\u003e\u003cstrong\u003eThe raw water circuit and the exhaust are the two systems that fail quietly, and then all at once.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA fouled heat exchanger does not set off an alarm. It gives up a little efficiency each season until a hot afternoon at cruising revs turns into an overheat. A carbonised exhaust elbow does not announce itself either — until it takes a turbocharger with it.\u003c\/p\u003e\n\n\u003cp\u003eBoth leave a trail, though, if anyone keeps one. This is that record: a thermal baseline taken while the system is clean, sixteen trend entries against it, and the full chronology of every impeller, anode, strainer clean and exchanger service, with the engine hours beside each.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#0A3F5C;border-left:4px solid #C5A059;border-radius:4px;padding:22px 24px;margin:26px 0;color:#F7F9FA;\"\u003e\n  \u003cp style=\"margin:0 0 4px;font-size:0.72em;letter-spacing:0.14em;text-transform:uppercase;color:#C5A059;font-weight:700;\"\u003eWhat you receive\u003c\/p\u003e\n  \u003cp style=\"margin:0 0 14px;font-size:1.25em;line-height:1.35;color:#FFFFFF;\"\u003eA seven-part record for both systems, kept across seasons\u003c\/p\u003e\n  \u003cul style=\"margin:0;padding-left:18px;line-height:1.75;color:#DCE6EC;\"\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 22-line reference page\u003c\/strong\u003e for the intervals, figures and part numbers you transcribe, with the source and page beside each\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA thermal baseline\u003c\/strong\u003e over six RPM steps — sea, raw water in and out, coolant, elbow skin, effectiveness\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003e16 trend entries and 4 full sweeps\u003c\/strong\u003e, with the sea temperature on every single row\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 10-line impeller chronology\u003c\/strong\u003e including how many vanes came back\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 12-line anode chronology\u003c\/strong\u003e, per position, never averaged\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 16-line exhaust inspection\u003c\/strong\u003e plus a backpressure page for what your engineer measured\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eA ratio, not a temperature\u003c\/h3\u003e\n\u003cp\u003eEvery absolute temperature in a raw water circuit moves with the sea. A reading taken in February and one taken in August are not comparable, which is exactly why a published “normal” differential is close to useless: it cannot know your sea temperature, your load, your exchanger or your flow rate.\u003c\/p\u003e\n\u003cp\u003eModel T2 gives you an effectiveness ratio instead — a dimensionless figure that survives a change in sea temperature between two readings. Compared against your own commissioning figure, a falling ratio is the earliest quantitative sign of scaling, fouling or a spent anode inside the core, long before a temperature alarm notices anything.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#F7F9FA;border:1px solid #E1E8EC;border-left:4px solid #A2803C;border-radius:4px;padding:20px 22px;margin:26px 0;\"\u003e\n  \u003cp style=\"margin:0 0 6px;color:#0A3F5C;font-weight:700;\"\u003eCount the vanes. Write the number down.\u003c\/p\u003e\n  \u003cp style=\"margin:0;line-height:1.7;\"\u003eAn impeller that comes out with five of six vanes has put one somewhere, and that somewhere is usually the heat exchanger inlet. The vanes-recovered column is the cheapest diagnostic in this document, and the one nobody keeps. Same logic on the anodes: recorded per position, never averaged, because one anode disappearing far faster than the others is a finding in itself and averaging is precisely what hides it.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eOn exhaust backpressure\u003c\/h3\u003e\n\u003cp\u003eInstalling a pressure tap downstream of a turbocharger and running an engine at eighty per cent of rated load to read it is not an owner task. This record has a page for logging what a qualified engineer measured — the reading, the RPM, the method and the name. It does not tell you how to measure it, and it does not tell you to.\u003c\/p\u003e\n\u003cp\u003eWhat it does ask you to do is find the date stamp on your exhaust hose and write it down. That is a date, not an opinion, and a hose that fails in a seaway fills a boat with water and exhaust gas at the same time.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWho it is for\u003c\/h3\u003e\n\u003cul style=\"line-height:1.75;\"\u003e\n  \u003cli\u003eOwners who have had one overheat and do not intend to have a second\u003c\/li\u003e\n  \u003cli\u003eOwners inheriting a boat with no service history and needing to start one\u003c\/li\u003e\n  \u003cli\u003eAnyone planning a passage where losing the engine is not an inconvenience\u003c\/li\u003e\n  \u003cli\u003eOwners preparing to sell, who want the cooling system to speak for itself\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eTechnical specification\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:0.95em;margin:12px 0 4px;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;width:42%;\"\u003eProduct ID\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eAML-MECH-2026-03\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eExtent\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e28 pages · 7 parts · 6 calculation models\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eRegister lines\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e134 across reference, baseline, trend, chronology and exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eInteractivity\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e924 live PDF form fields — 54 tick boxes and 870 entry fields\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eFormats included\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eA4 and US Letter, both fillable and print-ready\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eInstallations\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eIndirect or direct cooled marine diesel — no engine-specific data\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eUnits\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eUnit-neutral — you set them and record which you used\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eOffline\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eNo app, no account, no connection required once downloaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWhat it is not\u003c\/h3\u003e\n\u003cp\u003eThis document records, structures and compares figures that you supply. It publishes no temperature range, no backpressure limit and no service interval of its own, and it reaches no conclusion about any engine or installation. It is not a service manual and not engineering advice.\u003c\/p\u003e\n\u003cp\u003eWhere a reading matters, the decision belongs to a qualified marine engineer working from the manufacturer's documentation for your serial number.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:26px;\"\u003e\u003cstrong style=\"color:#0A3F5C;\"\u003eInstant download.\u003c\/strong\u003e Your links appear on screen the moment payment clears, and arrive by email within a minute. They do not expire.\u003c\/p\u003e\n\n\u003cp style=\"font-size:0.9em;color:#5C6B75;line-height:1.65;margin-top:22px;border-top:1px solid #E1E8EC;padding-top:16px;\"\u003e\u003cem\u003e2026 Captain's Edition · Revision 1.0 · AML-MECH-2026-03. Apex Marine Labs designs the organisational process behind good seamanship. Our documents record and organise; they do not replace a certified marine survey, a service manual, or a qualified marine engineer.\u003c\/em\u003e\u003c\/p\u003e","brand":"Apex Marine Labs","offers":[{"title":"2026 Captain's Edition","offer_id":56014142865576,"sku":"AML-MECH-2026-03","price":97.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/1161\/2072\/files\/apex-cooling-exhaust-record-01-cover.webp?v=1789747971"}],"url":"https:\/\/apexmarinelabs.com\/collections\/boat-maintenance-logs.oembed","provider":"Apex Marine Labs","version":"1.0","type":"link"}