Marine Trader 36 Double Cabin
Built 1975–1993
About the Marine Trader 36 Double Cabin
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 1975–1993
- Length
- 36 ft
- Waterline
- 32 ft
- Beam
- 12.17 ft
- Draft
- 3.5 ft
- Displacement
- 21,000 lb
- Hull
- fiberglass
- Hull / keel
- semi-displacement
- Propulsion
- inboard
- Water
- 150 gal
- Holding
- 40 gal
- Bow thruster
- often added later
Tank capacities — where the figures come from
-
Fuel unknown
“Fuel Tank: 350 Gallons (1324.89 Liters)” — broker listing (1984), curtisstokes.net · “Two fuel tanks port/starboard totaling 300 gallons” — search excerpt (1980), thehulltruth.comOur earlier figure was 400, from a powerboat guide. Two listings give 350 and 300, and no builder figure was found to settle it.
-
Water 150 gal
“Fresh Water: 180 Gallons (681.37 Liters)” — broker listing (1984), curtisstokes.netOne listing says 180; no builder figure.
-
Holding 40 gal
“Holding Tank: 20 Gallons (75.71 Liters)” — broker listing (1984), curtisstokes.netOne listing says 20; no builder figure.
-
Water heater unknown (Raritan)
“Raritan 6 gallon water heater” — broker listing (1984), curtisstokes.netOnly one broker listing (a 1984 boat) gives a heater size; no builder or importer equipment list found.
Tanks are often replaced or added on older boats — check the tank labels or a survey for yours.
Thrusters and steering — where this comes from
-
Bow thruster often added later
“2019 New Hydraulic steering - upper & lower helms and Cylinder/Ram ... Added Vitus bow thruster” — search excerpt (1985), kijiji.ca · “bow and stern thrusters make docking and maneuvering easier” — search excerpt (1979), yachtworld.comTwo separate boats for sale (1979 and 1985) have bow thrusters, the 1985 one clearly added later (a Vetus, misspelled in the ad); no builder document was found.
-
Stern thruster unknown
One 1979 boat (listed on YachtWorld and Craigslist) has bow and stern thrusters; it's a single boat, and no builder source was found.
-
Steering unknown
No builder or owners' source was found. A 1985 boat had its hydraulic steering (both helms and ram) renewed in 2019, but no source gives the original system.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Sources disagree on fuel tank — left blank rather than guessed.
Heavily built solid-fiberglass hull with hard aft chines and long keel. Layout changed in 1977 (galley to starboard, double berth aft); called the 37 DC in 1978-79. Aft stateroom opens to the cockpit. Single 6-cylinder Lehman cruises 6-8 knots. HMY does not state which Lehman horsepower.
Engines fitted
-
Ford Lehman 120 (2715E) — 120 hp, diesel, single
standard
HMY describes the 36 DC with a single Lehman six; a 1984 36 DC listing shows the original single Lehman 120 (2715E).Sources: hmy.com · curtisstokes.net
Generator
Generators vary boat to boat: an Onan 4.0 kW diesel on a 1979 boat, a Cummins Onan 5 kW (a later model than the 1984 hull, so a replacement or addition) on another, and at least one boat that never had one. That isn't enough to call it standard, optional or often added later, and no single unit appears on two boats.
Known problems for this model
-
Window leaks deck
Early boats often leak around the teak window frames.hmy.com
-
Electrical problems on early boats electrical
Early 36s are noted for assorted electrical faults; expect to inspect and upgrade original wiring.hmy.com
-
Teak deck leaks deck
Standard teak decks let water pool under the planks and into screw holes; check the deck's low point and the underside from the engine room.pacificyachting.com
Engines & parts
Ford Lehman 120 (6D380 / 2715E) parts: good
Factory standard engine — you entered “Ford Lehman 120 (2715E)”
Marinized by Lehman from the Ford of England 'Dorset' 2715E six-cylinder (380 cu in) industrial/truck diesel; Ford built the Dorset base engines 1964–1984. Base-engine internals interchange with the Ford 2715E, and marine-specific parts (raw water pumps, heat exchangers, injection elbows, gaskets, lift pumps, air filters) are widely stocked. American Diesel Corp (founded by former Lehman people) still sells parts, publishes spare-parts lists and gives technical advice. Rebuilt and used 120s are also sold by salvage yards.
Parts sources: American Diesel Corp, Go2marine (Ford Lehman parts collection), Fred Warner Marine & Outdoors
Common problems (2)
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Chronic oil leaks engine
Most 120s weep oil somewhere; owners often trace it to the rear of the engine near the heat exchanger (head/head gasket area) or to the drive seals of the gear-driven injection pump. Moderate oil use is treated as normal on these engines.trawlerforum.com · marineengine.com
-
Fuel leaks at injection pump, lift pump and return lines fuel
Slow diesel drips usually come from loose bleed screws or banjo washers, perished rubber injector return hoses, a failing lift-pump diaphragm, or worn internal seals in the Simms or CAV injection pump, which needs a pump shop to overhaul.yescenters.com
Maker’s service schedule (16)
| Engine oil & filter change | 200 hrs | “After first 15 hours running .... 1. Change Engine Oil ... Every 200 hours running ..... 17. Change engine and transmiss” — manufacturer (1986), marinedieselbasics.com |
| Fuel filters & water separator | 200 hrs | “Every 200 hours running ..... 18. Change all engine and fuel oil filters.” — manufacturer (1986), marinedieselbasics.com |
| Change oil in fuel injection pump | 50 hrs | “Every 50 hours running ...... 13. Check cleanliness of intake air filter. 14. Check (exchanger) zinc pencil. 15. Change” — manufacturer (1986), marinedieselbasics.com |
| Transmission fluid change | 200 hrs or 1 yr | “Change oil every 200 hours of operation or at least once each season under normal conditions” — manufacturer (1986), marinedieselbasics.com |
| Valve clearance check / adjust | 400 hrs | “After first 15 hours running .... 3. Adjust valve clearances. ... Every 400 hours running ..... 22. Adjust valve clearan” — manufacturer (1986), marinedieselbasics.com |
| Injector test / service | 400 hrs | “Every 400 hours running ..... 21. Remove and service injectors.” — manufacturer (1986), marinedieselbasics.com |
| Engine pencil zincs | 50 hrs | “After first 15 hours running .... 4. Check (exchanger) zinc pencil. ... Every 50 hours running ...... 14. Check (exchang” — manufacturer (1986), marinedieselbasics.com |
| Drive belts inspect / replace | 200 hrs | “After first 15 hours running .... 5. Adjust belt tension. ... Every 200 hours running ..... 16. Adjust belt tension.” — manufacturer (1986), marinedieselbasics.com |
| Air filter / intake silencer | 50 hrs | “After first 15 hours running .... 8. Check cleanliness of intake air filter. ... Every 50 hours running ...... 13. Check” — manufacturer (1986), marinedieselbasics.com |
| Clean fuel lift pump | 200 hrs | “Every 200 hours running ..... 19. Clean fuel lift pump.” — manufacturer (1986), marinedieselbasics.com |
| Clean injection pump cover filter | 200 hrs | “Every 200 hours running ..... 20. Clean injection pump cover filter.” — manufacturer (1986), marinedieselbasics.com |
| Remove raw water pump and check drive coupling | 400 hrs | “Every 400 hours running ..... 23. Remove raw water pump and check drive coupling. Place dab of grease on coupling halves” — manufacturer (1986), marinedieselbasics.com |
| Adjust idling speed (if required) | 400 hrs | “After first 15 hours running .... 10. Adjust idling speed (if required). ... Every 400 hours running ..... 24. Adjust id” — manufacturer (1986), marinedieselbasics.com |
| Check engine/propeller shaft alignment | 6 mo | “After first 15 hours running .... 9. Check engine/propeller shaft alignment. (twice annually, minimum).” — manufacturer (1986), marinedieselbasics.com |
| Replace Borg Warner transmission oil cooler | 1,200 hrs | “Suggested replacement is at 1200 hours.” — manufacturer, img1.wsimg.com |
| Inspect drive damper | 2,500 hrs | “Inspect your drive damper if you have more than 2500 hours on the engine.” — manufacturer, img1.wsimg.com |
Service part numbers (3)
| Raw-water impeller | Jabsco 1210-0001 | “6D380 5850-0001 040 3/4" NPT Flange SK33 3298 1210-0001” — manufacturer, marineengine.com · “Breakdown of 2C48 Pump ... 9 1 1210-0001 IMPELLER” — manufacturer, marinesurveyorontario.com |
| Raw-water pump kit original 2C45 pump (Jabsco 5850-0001) |
Jabsco SK33 | “6D380 5850-0001 040 3/4" NPT Flange SK33 3298 1210-0001” — manufacturer, marineengine.com |
| Raw-water pump kit Lehman 2C48 replacement pump (Jabsco 10950-2401 type) |
Jabsco SK239 | “Service Kit SK239 - Comprising Key 7/8/9/17” — manufacturer, marinesurveyorontario.com |
From the engine maker’s parts lists, or two independent parts dealers. Numbers change with serial number and get superseded — check yours before ordering.
Model sources (3)
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Other Marine Trader models
- Marine Trader 34 Double Cabin 1972–2001
- Marine Trader 34 Sedan 1973–2001
- Marine Trader 38 Double Cabin 1980–2000
- Marine Trader 40 Sundeck 1983–2000
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.