Bertram 33 Flybridge Cruiser
Built 1977–1992 by Bertram Yacht
Own one? Keep her maintenance, manuals and checklists here — free for a week
Shopping? Find the right used boat
Looking at one? Sea-trial scorecard
About the Bertram 33 Flybridge Cruiser
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 1977–1992
- Builder
- Bertram Yacht
- Length
- 33 ft
- Beam
- 12.5 ft
- Draft
- 3 ft
- Displacement
- 22,800 lb
- Hull
- fiberglass
- Hull / keel
- planing
- Propulsion
- inboard
- Fuel
- varies by year
- Water
- 70 gal
- Water heater
- 10 gal · AC + engine · standard
- Generator
- factory option
- Bow thruster
- not fitted
- Stern thruster
- not fitted
- Steering
- hydraulic · Hynautic
Tank capacities — where the figures come from
-
Fuel varies by year
“molded fiberglass fuel tank with a capacity of 260 usable gallons” — owner's manual (early boats (manual undated)), bertram.com · “Fuel, Gas 250/315 gals.” — spec database (gas, 1977-1979), bertram33.com · “Fuel, Gas 250/315 gals.” — spec database (gas, 1980 on), bertram33.com · “Fuel, Dsl. 255 gals.” — spec database (diesel, all years), bertram33.comBertram's own owner's manual (on the builder's site) gives one tank of 260 usable gal. The PowerBoat Guide page on the Bertram 33 owners' site says gas boats went from 250 to 315 gal in 1980, while diesel boats kept a 255-gal tank. Our earlier 315 is the post-1980 gas figure only.
-
Water 70 gal
“The fresh water tank has a capacity of 70 gallons” — owner's manual, bertram.com · “Water 70 gals.” — spec database, bertram33.com
-
Holding unknown
The owner's manual has no holding-tank capacity.
-
Water heater 10 gal · AC + engine · standard
“The 10 gallon water heater installed in front of the port engine ... has an electric immersion type element and also is” — owner's manual, bertram.com · “Most of the accessories are standard equipment such as ... and fresh water system (previously covered on pages 26 and 27” — owner's manual, bertram.comThe builder's owner's manual puts a 10 gal heater beside the water tank ahead of the port engine, heated by a 110V immersion element plus port-engine coolant. It calls the fresh water system standard equipment, while labeling the generator and air conditioning optional.
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; the builder's owner's manual doesn't mention a thruster, and no option list was found.
-
Stern thruster not fitted
Our earlier figure of none has no source, and nothing was found either way.
-
Steering hydraulic · Hynautic
“Steering Control (Hynautic-Hydraulic) The steering system consists of a hydraulic pump and pilot check valve, to which t” — owner's manual, bertram.comBertram's owner's manual describes Hynautic hydraulic steering: helm pump with pilot check valve, pressurised reservoir (2 qt at 30 psi) aft of the generator, double-acting cylinder on the rudder arm. Manual is undated.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Same solid hull as the 33 Sport Fisherman with a taller, roomier cabin. Two-stateroom layout standard from 1980; teak from 1984; 33 II (1988) with oak and new bridge. Fuel: gas 250/315 gal, diesel 255 gal. Deep-V (17 deg).
Engines fitted
-
Crusader 454 gas V8 — 340 hp, gas, twin
standard
HMY: standard twin 340 hp gas engines cruise at 18 kn (make not named). Bertram 33 owners' forum says the standard gas engines were 454s from either MerCruiser or Crusader depending on year.Sources: hmy.com · forum.bertram33.com · forum.bertram33.com
-
MerCruiser 454 gas V8 — 340 hp, gas, twin
standard
Same standard gas package in years when Bertram used MerCruiser rather than Crusader 454s, per the owners' forum; hp from HMY's 340 hp gas figure.Sources: forum.bertram33.com · forum.bertram33.com · hmy.com
-
Caterpillar 3208 — 260 hp, diesel, twin
factory option
HMY: 260 hp Cat diesels cruise about 22 kn; owners' forum puts the Cat 3208 option at 260-320 hp.Sources: hmy.com · forum.bertram33.com
-
Caterpillar 3208 (turbo) — 320 hp, diesel, twin
factory option
HMY: 320 hp Cats cruise 25-26 kn, about 30 top. The owners' forum groups these with the 3208s.Sources: hmy.com · forum.bertram33.com
-
MerCruiser 383 Stroker 6.2L (freshwater cooled) — 350 hp, gas, twin
common repower
A 1985 Flybridge Cruiser was repowered in 2018 with twin Mercury 383 Strokers; one documented example, so how common this is is not established.Sources: murrayyachtsales.com
Boats of the same model can differ — check which engines yours actually has before ordering parts.
Generator
factory option
“Main Circuit Breaker for Optional Generator is located under the cockpit deck on the generator sound bulkhead” — owner's manual, bertram.com
The manual covers starting the optional generator (with and without automatic demand) and a ship/shore transfer switch, but never names a make or size. One 1988 listing mentions an Onan (size not given).
Manuals and brochures online
- Owner's manual Bertram 33 owner's manual (68 pp. scan) — bertram.com
Hosted by the builder or an owners' association; they own the copyright.
Known problems for this model
No well-sourced problem reports found yet.
Engines & parts
Crusader 350 / 454 inboard gas V8 parts: good
Factory standard engine — you entered “Crusader 454 gas V8”
GM-based inboard engines; Crusader (now part of Pleasurecraft Marine Engine Co.) still publishes illustrated parts manuals and sells through distributors. Go2marine stocks Crusader manifolds, risers, raw water pumps and ignition parts; Osco and Barr make aftermarket manifolds, and new GM/Crusader base engines are sold by rebuilders.
Parts sources: Crusader Engines, Go2marine (Crusader parts), 1-800-RUNS-NEW (GM & Crusader base engines)
Common problems (1)
-
Clogged or failing manifolds/risers exhaust
Owners find individual risers running much hotter than the others (a sign of internal blockage) and debate replacing vs. flushing; Osco manifolds are often preferred as closest to OEM.marineengine.com · marineengine.com
Maker’s service schedule (14)
| Engine oil & filter change 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 50 hrs or 1 yr | “Change engine oil and filter — After 1st 25 Hrs / Every 50 Hours of Operation / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Fuel filters & water separator 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 50 hrs or 1 yr | “Fuel Filters - Service or replace — After 1st 25 Hrs / Every 50 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Raw-water pump impeller 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Cooling System - Inspect/Replace raw water pump impeller — Every 100 Hours of Operation / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Drive belts inspect / replace 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Drive Belt - Inspect condition and check tension — After 1st 25 Hrs / Every 100 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Spark plugs inspect / replace 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Ignition System and Spark Plugs - Clean and inspect condition — After 1st 25 Hrs / Every 100 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Exhaust mixing elbow inspection 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 4 mo | “Exhaust System - Check condition and tightness of all hose clamps — After 1st 25 Hrs / Every 100 Hours(1) / Once Each Ye” — manufacturer (2013), crusaderengines.com |
| Coolant replacement & freeze-point test 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 5 yrs | “Fresh-water cooled models - Change coolant — Every five years” — manufacturer (2013), crusaderengines.com |
| Engine pencil zincs 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 1 mo | “Zinc Anodes - Heat exchanger and cooler - check condition — Every 30 days” — manufacturer (2013), crusaderengines.com |
| Transmission fluid change 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 1 yr | “Transmission and "V" Drive - Change fluid and clean strainer, if equipped — After 1st 25 Hrs (Hurth Only) / Once Each Ye” — manufacturer (2013), crusaderengines.com |
| Flame arrestor & crankcase ventilation - clean and inspect 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Flame Arrestor and Crankcase Ventilation System - Clean and inspect — Every 100 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Engine alignment check 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 1 yr | “Engine Alignment - Check and adjust if necessary — After 1st 25 Hrs / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Inspect all hoses (and cooling hose clamps) 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Hoses (all) - Inspect for cracks, swelling, weather checking or other signs of deterioration — Every 100 Hours / Once Ea” — manufacturer (2013), crusaderengines.com |
| Shift & throttle cable linkage - inspect and lubricate 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 4 mo | “Shift and Throttle Cable Linkage - Inspect and lubricate — Every 100 Hours(1) / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Electrical system - check connections and wiring 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 50 hrs or 2 mo | “Electrical System (complete) - Check for loose or dirty connections and damaged wiring — Every 50 Hours(2) / Once Each Y” — manufacturer (2013), crusaderengines.com |
Service part numbers (18)
| Oil filter remote-mounted oil filter (MP7.4L and 2013 5.0/5.7/6.0L MPI) |
Crusader 22679 | “Oil Filter 22679 (MAINTENANCE ITEM PART NUMBERS)” — manufacturer, crusaderengines.com |
| Fuel filter MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008 |
Crusader 47038 | “Fuel Filter 47038 (MAINTENANCE ITEM PART NUMBERS)” — manufacturer, crusaderengines.com |
| Fuel filter 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13 |
Crusader RP080026 | “Fuel Control Cell (FCC) Fuel Filter Element RP080026” — manufacturer, crusaderengines.com |
| Fuel pre-filter / separator MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: engine-mounted Racor water-separating filter 47046 |
Crusader 47047 | “25 47047 Element, Racor fuel filter (Not Shown) 1” — manufacturer, crusaderengines.com |
| Fuel pre-filter / separator 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13: primary fuel filter |
Crusader R080033 | “Primary Fuel Filter Element R080033” — manufacturer, crusaderengines.com |
| Raw-water impeller MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008 (raw water pump RA057031) |
Crusader RP061017 Replaces R061017 |
“Replaces Crusader R061017 (Impeller Kit with Gasket & O-Ring | Crusader RP061017)” — dealer, marinepartssource.com · “Replaces Crusader R061017 (Impeller Kit with Gasket & O-Ring | Crusader RP061017)” — dealer, marinesuppliesdepot.com |
| Raw-water impeller 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13 |
Crusader RP061022 | “Impeller , Raw Water Pump (1) RP061022 (ON-BOARD PARTS KIT 5.7L)” — manufacturer, crusaderengines.com |
| Raw-water pump kit MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008 (raw water pump RA057031) |
Crusader 40064 | “40064 Overhaul Kit, Major (includes items 2, 3, 11, 14 and 15)” — manufacturer, crusaderengines.com |
| Drive belt MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: alternator drive |
Crusader 98210 | “Alternator Drive Belt 98210” — manufacturer, crusaderengines.com |
| Drive belt MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: raw water pump drive |
Crusader 10258 | “Raw Water Pump Drive Belt 10258” — manufacturer, crusaderengines.com |
| Drive belt 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13, left-hand (LH) rotation: serpentine |
Crusader R066028 | “Belt , Serpentine (1) R066028 (ON-BOARD PARTS KIT 5.7L (LH))” — manufacturer, crusaderengines.com |
| Drive belt 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13, right-hand (RH) rotation: serpentine |
Crusader R066029A | “Belt , Serpentine (1) R066029A (ON-BOARD PARTS KIT 5.7L (RH))” — manufacturer, crusaderengines.com |
| Spark plug MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: platinum plug |
Crusader 49078 × 8 | “Spark Plugs (platinum) 49078” — manufacturer, crusaderengines.com |
| Spark plug 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13: platinum plug set |
Crusader RP030010 | “Spark Plug , Set, (Platinum) (1) RP030010 (ON-BOARD PARTS KIT 5.7L)” — manufacturer, crusaderengines.com |
| Thermostat MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: raw-water (standard) cooling, 143 F |
Crusader R026002E | “6 R026002E Thermostat (143-degree) 1 (Raw Water Cooling Components - Figure 18)” — manufacturer, crusaderengines.com |
| Thermostat MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: fresh-water (closed) cooling kit, 170 F |
Crusader 98203 | “5 98203 Thermostat (170-degree) 1 (Fresh Water Cooling Components 1)” — manufacturer, crusaderengines.com |
| Zinc / anode MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: oil cooler / transmission cooler / heat exchanger |
Crusader R168005 | “24 R168005 Zinc, sacrificial 1 (Raw Water Cooling Components - Figure 18)” — manufacturer, crusaderengines.com |
| On-board spare parts kit (belt, cap, rotor, fuses, relays, plugs, impeller, fuel filters) 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13, LH rotation |
Crusader RK173089D-07 | “ON-BOARD PARTS KIT 5.7L (LH) 2007 TO PRESENT, FCC FUEL SYSTEM RK173089D-07” — manufacturer, crusaderengines.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.
MerCruiser 7.4 (454) V8 gas parts: good
Factory standard engine — you entered “MerCruiser 454 gas V8”
GM big-block base; Marine Engine Depot and others sell 7.4 L engines and parts, and cast-iron riser kits run a few hundred dollars. Manifold and riser replacement is the main recurring expense.
Parts sources: Marine Engine Depot, Power Boat Supply
Common problems (2)
-
Manifold and riser corrosion exhaust
As with other gas marine V8s, internally rusted manifolds and risers can let water into the engine; periodic replacement is standard practice.powerandmotoryacht.com
-
Rough running and won't rev under load fuel
Common troubleshooting threads trace this to fuel delivery (filters, pump, carburetor) or ignition timing problems.justanswer.com · youtube.com
Maker’s service schedule (8)
| Engine oil & filter change | 100 hrs or 1 yr | “Most four-stroke outboards and sterndrive engines require an oil change either annually or every 100 hours of operation.” — manufacturer, mercurymarine.com |
| Fuel filters & water separator | 100 hrs or 1 yr | “The fuel filter on your engine should be inspected or replaced per the maintenance schedule in your owner's manual, usua” — manufacturer, mercurymarine.com |
| Raw-water pump impeller | 300 hrs or 3 yrs | “How often should my seawater pump impeller be serviced? Every 300 hours or 3 years, whichever comes first.” — manufacturer, mercurymarine.com |
| Spark plugs inspect / replace | 300 hrs or 3 yrs | “How often should spark plugs be changed? Every 300 hours or 3 years, whichever comes first.” — manufacturer, mercurymarine.com |
| Coolant replacement & freeze-point test closed (freshwater) cooling only | 5 yrs | “How often should coolant be changed on engines with closed cooling? Every 5 years.” — manufacturer, mercurymarine.com |
| Transmission fluid change sterndrive gear lube | 1 yr | “Gearcase lubricant in outboard and sterndrive lower units should also be changed annually or at the service interval spe” — manufacturer, mercurymarine.com |
| Lubricate steering linkage and check power-steering fluid sterndrive | 100 hrs or 1 yr | “Mercury Marine recommends lubricating the steering linkage and checking the power steering fluid level in ... MerCruiser” — manufacturer, mercurymarine.com |
| Check power trim fluid level sterndrive | 100 hrs or 1 yr | “Power trim and tilt fluid level should be checked annually or every 100 hours.” — manufacturer, mercurymarine.com |
Service part numbers (4)
| Oil filter | Mercury Quicksilver 35-866340Q03 | “Part number: 866340Q03 ... for MerCruiser sterndrive and inboard engines except V6 engines with the oil filter mounted o” — manufacturer, mercurymarine.com · “14957 FILTER, Oil (1 required per assembly) ... 35-866340Q03 - Oil Filter” — dealer, marineengine.com |
| Fuel filter carbureted engines (Rochester 4-barrel): filter inside carburetor fuel inlet |
Mercury 53336T | “For use on MerCruiser 3.0L, 4.3L, 5.0L , 5.7L and 7.4L engines with Rochester 2- and 4-barrel and MerCarb” — manufacturer, mercurymarine.com |
| Raw-water impeller Bravo sterndrive / inboard with pre-2000 engine-mounted plastic sea water pump |
Mercury Quicksilver 47-59362Q01 Also: Sierra 18-3087 |
“For MerCruiser engines with engine mounted, 2-piece, plastic sea water pumps.” — manufacturer, mercurymarine.com · “Included water Pump Impeller 59362Q01 fits Pre-2000 plastic seawater sea pumps. WILL NOT work on newer (2000+)” — dealer, midnightmarine.net |
| Thermostat standard cooling, 160 F |
Mercury Quicksilver 807252Q5 | “Thermostat 807252Q5 is for V6 and V8 MerCruiser engines ... made by General Motors (model year 1987-2016)” — manufacturer, mercurymarine.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.
Caterpillar 3208 (NA / T / TA) parts: good
Factory optional engine — you entered “Caterpillar 3208”
V8 introduced in the 1970s and discontinued in the late 1990s (Big Bear Engine gives 1999). Naturally aspirated versions run about 210 hp; turbo and turbo-aftercooled versions go up to 435 hp. Cat dealers still supply many genuine parts by serial number, and aftermarket in-frame/overhaul kits (pistons, rings, liners, bearings) are sold by Diesel Pro Power, Highway and Heavy Parts and others; complete remanufactured long blocks are also sold. The block is unsleeved from the factory but can be bored and sleeved during a rebuild.
Parts sources: Diesel Pro Power, Highway and Heavy Parts (Cat 3208), Big Bear Engine Company (3208 long blocks)
Common problems (3)
-
Aftercooler failure flooding the engine (TA models) cooling
The seawater-cooled aftercooler on turbo-aftercooled 3208s has aluminum parts that corrode; a failure can let seawater into the cylinders. Owners pull, clean, grease and pressure-test aftercoolers every 2–3 years and some replace them on a fixed schedule.trawlerforum.com · forums.ybw.com
-
Short life at high ratings / overloading engine
The higher-rated 3208TA engines last longer when run well below full power and propped so they can reach rated rpm; overheating or running at full load continuously shortens life.trawlerforum.com · trawlerforum.com
-
Overheating at high throttle cooling
Common causes owners check are clogged heat exchangers, thermostats, fouled keel coolers or restricted raw water flow, and faulty temperature senders.justanswer.com · facebook.com
Maker’s service schedule (20)
| Engine oil & filter change | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Engine Oil and Filter - Change” — manufacturer, princessklubben.se |
| Fuel filters & water separator | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Fuel System Primary Filter/Water Separator Element” — manufacturer, princessklubben.se |
| Raw-water pump impeller | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Auxiliary Water Pump - Inspect” — manufacturer, princessklubben.se |
| Engine pencil zincs | 50 hrs | “Every 1900 L (500 US gal) of Fuel or 50 Service Hours ... Zinc Rods - Inspect/Replace” — manufacturer, princessklubben.se |
| Air filter / intake silencer | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Engine Air Cleaner Element - Clean/Replace” — manufacturer, princessklubben.se |
| Valve clearance check / adjust | 2,000 hrs | “Initial 9000 L (2400 US gal) of Fuel or 250 Service Hours or 1 Year ... Engine Valve Lash - Inspect/Adjust” — manufacturer, princessklubben.se |
| Coolant replacement & freeze-point test Cat DEAC / conventional coolant | 1,000 hrs or 2 yrs | “Every 36 000 L (9000 US gal) of Fuel or 1000 Service Hours or 2 Years ... Cooling System Coolant (DEAC) - Change” — manufacturer, princessklubben.se |
| Coolant replacement & freeze-point test Cat ELC (extended life coolant) | 6,000 hrs or 4 yrs | “Every 216 000 L (57 000 US gal) of Fuel or 6000 Service Hours or 4 Years ... Cooling System Coolant (ELC) - Change” — manufacturer, princessklubben.se |
| Turbocharger inspection | 1,000 hrs or 2 yrs | “Every 36 000 L (9000 US gal) of Fuel or 1000 Service Hours or 2 Years ... Aftercooler Core - Clean/Test” — manufacturer, princessklubben.se |
| Turbocharger inspect | 2,000 hrs | “Every 72 000 L (19 000 US gal) of Fuel or 2000 Service Hours ... Turbocharger - Inspect” — manufacturer, princessklubben.se |
| Heat exchanger & oil cooler cleaning | 2,000 hrs | “Every 72 000 L (19 000 US gal) of Fuel or 2000 Service Hours ... Heat Exchanger - Inspect” — manufacturer, princessklubben.se |
| Injector test / service | 2,000 hrs | “Every 72 000 L (19 000 US gal) of Fuel or 2000 Service Hours ... Fuel Injection Nozzles - Test/Exchange” — manufacturer, princessklubben.se |
| Sea water strainer clean/inspect | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Sea Water Strainer - Clean/Inspect” — manufacturer, princessklubben.se |
| Coolant SCA test/add | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Cooling System Supplemental Coolant Additive (SCA)” — manufacturer, princessklubben.se |
| Hoses and clamps inspect/replace | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Hoses and Clamps - Inspect/Replace” — manufacturer, princessklubben.se |
| Crankcase breather clean | 250 hrs or 1 yr | “Every 9000 L (2400 US gal) of Fuel or 250 Service Hours or Yearly ... Engine Crankcase Breather - Clean” — manufacturer, princessklubben.se |
| Thermostat (water temperature regulator) replace | 1,000 hrs or 2 yrs | “Every 36 000 L (9000 US gal) of Fuel or 1000 Service Hours or 2 Years ... Cooling System Water Temperature Regulator - R” — manufacturer, princessklubben.se |
| Marine transmission oil cooler clean/inspect | 1,000 hrs or 2 yrs | “Every 36 000 L (9000 US gal) of Fuel or 1000 Service Hours or 2 Years ... Marine Transmission Oil Cooler - Clean/Inspect” — manufacturer, princessklubben.se |
| Crankshaft vibration damper inspect | 2,000 hrs | “Every 72 000 L (19 000 US gal) of Fuel or 2000 Service Hours ... Crankshaft Vibration Damper - Inspect” — manufacturer, princessklubben.se |
| Jacket water pump inspect | 3,000 hrs or 2 yrs | “Every 108 000 L (28 500 US gal) of Fuel or 3000 Service Hours or 2 Years ... Water Pump - Inspect” — manufacturer, princessklubben.se |
Service part numbers (4)
| Fuel filter | Caterpillar 1R-0750 | “| Fuel Filter | 1R0750 |” — dealer, marineenergy.com.au · “Fuel Filter for Caterpillar 3208 Natural and Turbo engines 1R0750 Advanced Efficiency” — dealer, dieselpro.com |
| Zinc / anode heat-exchanger anode (10 mm); 2 on the 4W-9164 heat exchanger, 3 on the 7C-3114 heat exchanger |
Caterpillar 6L-2283 | “| Anodes on 7C-3114 Heat Exchanger | 6L-2283 | [CM6L2283] x 3.” — dealer, marineenergy.com.au · “Zinc Anode for Caterpillar Marine Engines 6L2283 NPT: 1/4”” — dealer, dieselpro.com |
| Zinc / anode 16 mm anode, starboard bottom of bonnet, 4W-9164 heat exchanger only |
Caterpillar 6L-2289 | “Anodes on 4W-9164 Heat Exchanger | 6L-2283 6L-2289 ... [TEC 02023] x 1. Starboard Side, bottom of the bonnet. 16mm” — dealer, marineenergy.com.au · “Zinc Anode for Caterpillar Marine Engines 6L2289 NPT: 1/2”” — dealer, dieselpro.com |
| Zinc / anode transmission oil cooler anode (if the cooler has one) |
Caterpillar 6L-2288 | “| Anode - Transmission Oil Cooler (If present on cooler) | 6L-2288 |” — dealer, marineenergy.com.au · “Zinc Anode for Caterpillar Marine Engines 6L2288 NPT: 1/2”” — 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.
Sources disagree on horsepower — left blank rather than guessed.
Steering
Hynautic — K-series pressurized hydraulic steering (H-series helms, K-series cylinders) parts: obsolete
SeaStar bought Hynautic and kept making components and rebuild kits for years; after Dometic bought SeaStar, Hynautic pages and parts were removed from Dometic's site. Helms H-21 through H-52 and cylinders K-6 through K-31 are discontinued. Seatech Marine Products publishes SeaStar direct-replacement equivalents (e.g., H-50/H-52 replacement kits usable in the pressurized system with a non-vented fill plug) and offers rebuild services; independent hydraulic shops rebuild helms and cylinders for roughly $250–350 each. Kobelt/Accu-Steer also supply steering and power-assist equipment used on larger boats.
Parts sources: Seatech Marine Products (Hynautic alternatives & rebuilds), Kobelt (marine steering systems)
Common problems (3)
-
Helm pump shaft seal leaks steering
The upper helm shaft seal deteriorates from sun, salt and dirt and weeps oil; raising system pressure is only a stopgap, and the helm must be removed and resealed.samsmarine.com · trawlerforum.com · youtube.com
-
Cylinder rod seal leaks steering
Damaged wiper/rod seals let fluid out the end of K-6 type cylinders.facebook.com
-
Olive-type tubing fittings leak steering
Some owners dislike Hynautic's olive compression fittings on plastic tubing because they are prone to leaks.trawlerforum.com
Model sources (6)
hmy.com · forum.bertram33.com · forum.bertram33.com · murrayyachtsales.com · bertram.com · bertram33.com
Own a Bertram 33 Flybridge Cruiser? Add her to your boats, then share a photo — names, numbers and faces are blurred before it appears.
Other Bertram models
- Bertram 28 Flybridge Cruiser 1971–1994
- Bertram 31 Flybridge Cruiser 1961–1983
- Bertram 35 Convertible 1970–1986
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.