Luhrs 34 Convertible
Built 2000–2003 by Luhrs Marine
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About the Luhrs 34 Convertible
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 2000–2003
- Builder
- Luhrs Marine
- Length
- 36.83 ft
- Beam
- 13.08 ft
- Draft
- 3.33 ft
- Displacement
- 18,000 lb
- Hull
- fiberglass-cored
- Hull / keel
- planing
- Propulsion
- inboard
- Fuel
- 300 gal
- Water
- 90 gal
- Holding
- 40 gal
- Bow thruster
- not fitted
- Stern thruster
- not fitted
Tank capacities — where the figures come from
-
Fuel 300 gal
“a 300-gallon fuel capacity” — search excerpt (2001), boattrader.com · “Fuel tank 300 Gallons (1135.62 Liters)” — search excerpt (2001), machinio.comSeveral listings agree (likely from a shared spec database); no builder figure was found. The 295-gal tank in a marine surveyor's review belongs to the older Luhrs 340 Sedan, a different boat.
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Water 90 gal
“90 gallons of water” — search excerpt (2001), boattrader.com · “Fresh water 90 Gallons (340.69 Liters)” — search excerpt (2001), machinio.comListings agree; no builder figure found.
-
Holding 40 gal
“a 40-gallon holding tank” — search excerpt (2001), boattrader.com · “Holding tank 40 Gallons (151.42 Liters)” — search excerpt (2001), machinio.comListings agree; no builder figure found.
-
Water heater unknown
The PowerBoat Guide text does not mention the water heater; no other source 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 not fitted
Our earlier figure of none has no source, and nothing was found either way.
-
Stern thruster not fitted
Our earlier figure of none has no source, and nothing was found either way.
-
Steering unknown
No builder, review or owners' source on steering was found. Boating World's spec page lists no equipment, and the HMY powerboat guide page couldn't be checked.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Sources disagree on engines[Yanmar].hp, hp (optional diesels) — left blank rather than guessed.
Cored hullsides with solid glass bottom; wide 13.1-ft beam; heavily built. Molded steps to bridge; generator and trim tabs standard. LOA includes pulpit. Cummins 370hp is from HMY's text only (listed alongside Yanmar).
Engines fitted
-
Yanmar 6LP-STE — 300 hp, diesel, twin
factory option
A 2000 Luhrs 34 Convertible lists twin Yanmar 6LP-STE at 300 hp each.Sources: breweryacht.com
-
Yanmar 6LPA-STP — 315 hp, diesel, twin
factory option
A 2001 boat lists twin Yanmar 6LPA-STP at 315 hp each. HMY describes the optional Yanmar diesels as 370 hp in one line and 350 hp in another (see disputed).Sources: denisonyachtsales.com · hmy.com
-
Cummins 6BTA 5.9 — 350 hp, diesel, twin
factory option
HMY lists Cummins as the alternative diesel (370 hp); a 2002 boat has twin Cummins 6BT-series diesels at 350 hp.Sources: hmy.com · yachtr.com
- Yanmar diesel — diesel factory option
- Cummins diesel — 370 hp, diesel factory option
Boats of the same model can differ — check which engines yours actually has before ordering parts.
Generator
“Standard features include ... swim platform, generator, and trim tabs.” — spec database, cdn.denisonyachtsales.com
The PowerBoat Guide lists a generator among standard features, matching our earlier note, but it's the only source found, so we don't mark it standard. No make or size was found.
Known problems for this model
-
Tight engine room engine
Engine room is tight, though it has convenient access from the cockpit.hmy.com
Engines & parts
Yanmar 6LP (6LP-DTE / STE / 6LPA-STP) parts: good
Factory optional engine — you entered “Yanmar 6LP-STE”
Supported by Yanmar dealers; the cooling stack (charge-air cooler, oil cooler, heat exchanger) is the main service expense.
Parts sources: Mack Boring & Parts (Yanmar distributor)
Common problems (2)
-
Neglected cooler service cooling
The charge-air cooler, oil cooler and heat exchanger need regular removal and cleaning; a failing raw-water oil cooler can leak oil into the cooling water.youtube.com · facebook.com
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Turbo problems limiting rpm exhaust
Engines that won't reach rated rpm under load or burn oil are often traced to turbocharger wear or fouling.bertram31.com · facebook.com
Maker’s service schedule (17)
| Engine oil & filter change 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 125 hrs or 6 mo | “Perform the following maintenance every 125 hours of operation or 6 months, whichever comes first. Changing the Engine O” — manufacturer, nhmr.nl |
| Fuel filters & water separator 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 250 hrs or 1 yr | “Perform the following maintenance every 250 hours or one year of operation, whichever comes first. Replacing the Fuel Fi” — manufacturer, nhmr.nl |
| Drain fuel tank water and fuel/water separator 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 50 hrs or 1 mo | “perform the following procedures every 50 hours thereafter or monthly, whichever comes first. Draining Water From the Fu” — manufacturer, nhmr.nl |
| Coolant replacement & freeze-point test | 250 hrs or 1 yr | “Perform the following maintenance every 250 hours or one year of operation, whichever comes first. ... Changing the Cool” — manufacturer, nhmr.nl |
| Engine pencil zincs 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 250 hrs or 1 yr | “Perform the following maintenance every 250 hours or one year of operation, whichever comes first. ... Checking or Repla” — manufacturer, nhmr.nl |
| Turbocharger inspection 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 250 hrs or 1 yr | “Perform the following maintenance every 250 hours or one year of operation, whichever comes first. ... Cleaning the Turb” — manufacturer, nhmr.nl |
| Air filter / intake silencer 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 250 hrs or 1 yr | “Perform the following maintenance every 250 hours or one year of operation, whichever comes first. ... Cleaning the Air” — manufacturer, nhmr.nl |
| Adjust remote control cable 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 250 hrs or 1 yr | “Perform the following maintenance every 250 hours or one year of operation, whichever comes first. ... Adjusting the Rem” — manufacturer, nhmr.nl |
| Exhaust mixing elbow inspection 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 500 hrs or 2 yrs | “Perform the following maintenance every 500 hours or 2 years of operation, whichever comes first. Cleaning or Replacing” — manufacturer, nhmr.nl |
| Replace fuel lines and rubber hoses 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 500 hrs or 2 yrs | “Replace fuel line and rubber hoses every 500 hours or 2 years, whichever comes first.” — manufacturer, nhmr.nl |
| Drive belts inspect / replace 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 500 hrs or 2 yrs | “Perform the following maintenance every 500 hours or 2 years of operation, whichever comes first. ... Adjusting or Repla” — manufacturer, nhmr.nl |
| Raw-water pump impeller 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 1,000 hrs or 4 yrs | “NOTICE: Replace the seawater pump impeller every 1000 hours even if no damage is apparent.” — manufacturer, nhmr.nl |
| Valve clearance check / adjust 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 1,000 hrs or 4 yrs | “Perform the following maintenance every 1000 hours or 4 years of operation, whichever comes first. ... Adjusting Intake” — manufacturer, nhmr.nl |
| Injector test / service 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 1,000 hrs or 4 yrs | “Perform the following maintenance every 1000 hours or 4 years of operation, whichever comes first. Checking the Fuel Inj” — manufacturer, nhmr.nl |
| Replace timing belt (dealer) 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 1,250 hrs or 5 yrs | “Perform the following maintenance procedures every 1250 hours of operation or 5 years, whichever comes first. ... Replac” — manufacturer, nhmr.nl |
| Heat exchanger & oil cooler cleaning 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 1,250 hrs or 5 yrs | “Perform the following maintenance procedures every 1250 hours of operation or 5 years, whichever comes first. Cleaning t” — manufacturer, nhmr.nl |
| Check battery electrolyte level 6LPA-STP2 / 6LPA-STZP2 (2007 Yanmar manual) | 50 hrs or 1 mo | “perform the following procedures every 50 hours thereafter or monthly, whichever comes first. ... Checking Battery Elect” — manufacturer, nhmr.nl |
Service part numbers (8)
| Oil filter | Yanmar 119770-90620-12 Replaces 119770-90620 |
“6LP(A) Basic Service Kit ... 119770-90620-12 1 OIL FILTER (12 PACK)” — dealer, oldportmarine.com · “Oil Filter: 119770-90620 , 119770-90620-01 ,119770-90620-12” — dealer, staycoolpumps.com |
| Fuel filter | Yanmar 119773-55710-12 Replaces 119773-55710 |
“6LP(A) Basic Service Kit ... 119773-55710-12 1 FUEL FILTER (REV) 12” — dealer, oldportmarine.com · “Fuel Filter: 119773-55510 , 119773-55710 , 119773-55710-12” — dealer, staycoolpumps.com |
| Raw-water impeller | Yanmar 119773-42600 | “Impeller Kit: Impeller 119773-42600 , O-ring 119773-42570” — dealer, staycoolpumps.com · “Replacement Part Number: 119773-42600 ... Fit For Yanmar Engine: 6LP, 6LPA, 6LP(A)-DTE(P, 6LP(A)-STE(P” — dealer, fridayparts.com |
| Drive belt | Yanmar 119775-77260 × 2 | “119775-77260 Alternator belt. 2 required.” — dealer, oldportmarine.com · “It fits Yanmar 6LPA, 6LPA-STP, 6LPA-DTP, 6LPA-STP2 engines.” — dealer, deltadieselparts.com |
| Air filter | Yanmar 119593-18880 | “6LP(A) Basic Service Kit ... 119593-18880 1 FILTER, AIR 65MM” — dealer, oldportmarine.com · “Air Filter: 119593-18880” — dealer, staycoolpumps.com |
| Zinc / anode | Yanmar 119574-44150 × 4 | “6LP(A) Basic Service Kit ... 119574-44150 4 ZINC, ANTI-CORROSIVE” — dealer, oldportmarine.com · “(5) 119574-44150 (2) Heat Exchanger (2) Oil Cooler (1) Fuel Cooler. Some models may only use 4” — dealer, staycoolpumps.com |
| Zinc / anode | Yanmar 119574-18790 | “119574-18790 (1) Zinc” — dealer, oldportmarine.com · “Zinc Kit: 119773-92600 , (1) 119574-18790 Intercooler” — dealer, staycoolpumps.com |
| Thermostat | Yanmar 119773-49550 | “119773-49550 Thermostat / 119773-49570 Gasket” — dealer, oldportmarine.com · “It fits Yanmar 6LPA-STP, 6LPA-STP2, 6LPA-STZP, 6LPA engines.” — dealer, deltadieselparts.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.
Cummins 6BT / 6BTA 5.9 parts: good
Factory optional engine — you entered “Cummins 6BTA 5.9”
Mechanically injected 5.9 L inline six from the Cummins B-series truck/industrial family, so base-engine parts are everywhere. Cummins still sells factory ReCon (remanufactured) marine 6BT/6BTA engines (152–210 hp ratings) with a 2-year/2000-hour warranty. Seaboard Marine is the best-known marine specialist, selling aftercooler/heat-exchanger service kits, upgraded raw water pumps and technical guidance; TAD also sells Cummins packages.
Parts sources: Seaboard Marine, Cummins (ReCon 6BT/6BTA), Diesel Pro Power
Common problems (2)
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Aftercooler corrosion letting seawater into the intake cooling
On the turbo-aftercooled 6BTA the seawater-cooled aftercooler core has vertical tubes and an aluminum housing that corrodes from condensate; a leak can put salt water into the cylinders and wreck the engine. Owners pull, clean, grease and pressure-test the core every few years and fit new O-rings.trawlerforum.com · sbmar.com
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Heat exchanger and aftercooler service cooling
Routine seawater-side service (O-rings, gaskets, zincs) is a recurring owner job; kits are sold for it and refilling coolant without trapping air is a common question.sbmar.com · sbmar.com
Service part numbers (5)
| Oil filter | Cummins 3937743 | “| Oil Filter | 3937743 |” — dealer, marineenergy.com.au · “Cummins Oil Filter 3937743 Spin-on type, 3.66" outside diameter, 6.95" height” — dealer, dieselpro.com |
| Fuel filter 6BT 5.9 210 hp (CPL 742) |
Fleetguard FF5052 Replaces FF42000, FS1251 |
“on-engine fuel filter with drain for all 6BT 210 B’s (CPL 742). Replaces the FF42000, FS1251.” — dealer, sbmar.com · “Cummins 6BT Fuel Filter 3931063 FF5052” — dealer, marineenergy.com.au |
| Fuel filter late 6BTA (also late 4BTA and 6CTA) |
Fleetguard FF5285 | “Fleetguard FF5285 Fuel Filter – late 4BTA 6BTA and 6CTA’s” — dealer, sbmar.com · “Cummins 6BTA Fuel Filter 3890017 FF5285 ... suits late model Cummins 6BTA's, 6CTA8.3-M” — dealer, marineenergy.com.au |
| Raw-water impeller seawater pump with 1-1/4 in hose ports (Sherwood M70/M71 type, early 4BT/6BT) |
Sherwood 10615K | “Seawater Pump Impeller | **1-1/4" PORTS** 3908220 10615K” — dealer, marineenergy.com.au · “Cummins Marine Water Pump Impeller 10615K 2 9/16" diameter, 1 5/8" length” — dealer, dieselpro.com |
| Raw-water impeller keyway-shaft pump, 2 in inlet / 1-3/4 in outlet, 11° offset flange (e.g. P1716/P1730 on 6BTA) |
Sherwood 17000K | “**2" inlet & 1-3/4" outlet ports with 11° OFFSET flange** 17000K” — dealer, marineenergy.com.au · “Cummins Impeller for Key Shaft 17000K” — dealer, dieselpro.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 (5)
hmy.com · breweryacht.com · denisonyachtsales.com · yachtr.com · cdn.denisonyachtsales.com
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Other Luhrs models
- Luhrs 350 Convertible 1990–1996
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.