Perkins M85T Marine Engine Spare Parts
The Perkins M85T Marine Engine is a turbocharged marine diesel engine designed for marine propulsion applications. It can be found in sailing yachts, motor yachts, cruising vessels and other marine installations where dependable diesel propulsion is required.
As M85T engines accumulate operating hours, spare-parts requirements can range from routine filters, belts, impellers and seals to fuel-injection equipment, turbocharger components, cooling-system parts, cylinder-head components and major internal engine parts.
Alfa Marine Spare Parts supports Perkins M85T Marine Engine Spare Parts requirements for:
- Planned Maintenance
- Yacht Maintenance and Refits
- Engine-Room Repairs
- Commercial Marine Maintenance
- Fuel-System Repairs
- Cooling-System Repairs
- Turbocharger Repairs
- Cylinder Head Repairs
- Internal Engine Repairs
- Major Engine Overhauls
- Spare Parts Planning
Depending on component and availability, supply options can include:
- Genuine Perkins Parts
- OEM-Quality Components
- Selected Aftermarket Parts
- Remanufactured Components
- Maintenance Parts
- Repair Components
- Overhaul Parts
What Are the Technical Specifications of the Perkins M85T?
The M85T belongs to Perkins' established range of marine propulsion engines.
SpecificationPerkins M85TManufacturerPerkinsEngine ModelM85TApplicationMarine PropulsionConfigurationInline 4-CylinderCycleFour-Stroke DieselFuelDieselAspirationTurbochargedCoolingFreshwater / Heat Exchanger Marine CoolingRated OutputApprox. 85 hp / 63 kWTypical ApplicationsSailing Yachts, Motor Yachts & Marine Craft
Exact specifications, ratings and component arrangements can vary according to the particular engine build and installation.
For spare-parts identification, the engine serial number and build information should take priority over assumptions based only on the M85T model designation.
Why Is Correct Perkins M85T Identification Important?
Many Perkins M85T engines have accumulated years of service.
During that time, components may have been:
- Rebuilt
- Reconditioned
- Exchanged
- Replaced
- Superseded
- Updated
This can be particularly important when identifying:
- Fuel Injectors
- Fuel Injection Equipment
- Turbochargers
- Raw-Water Pumps
- Freshwater Pumps
- Heat Exchangers
- Starter Motors
- Alternators
- Electrical Components
Providing information from both the engine and currently installed component can help reduce parts-identification errors.
Perkins M85T Routine Maintenance Parts
Common maintenance requirements can include:
- Engine Oil Filters
- Fuel Filters
- Fuel-Water Separator Elements
- Air Filter Components
- Raw-Water Pump Impellers
- Belts
- Thermostats
- Gaskets
- O-Rings
- Seals
- Cooling-System Components
- Service Kits
Does Every Perkins M85T Require the Same Maintenance?
Not necessarily.
Component condition can be influenced by:
- Annual Operating Hours
- Engine Loading
- Extended Low-Load Operation
- Saltwater Exposure
- Fuel Quality
- Lubricating Oil Condition
- Coolant Condition
- Engine-Room Temperature
- Maintenance History
- Long Periods of Inactivity
A seasonal yacht engine can therefore develop different maintenance requirements from an engine operating regularly throughout the year.
Perkins M85T Fuel-System Parts
Potential requirements can include:
- Fuel Injectors
- Injector Nozzles
- Fuel Injection Equipment
- Fuel Lift Pump
- Primary Fuel Filters
- Secondary Fuel Filters
- Fuel-Water Separator Components
- Injector Pipes
- Fuel Supply Components
- Fuel Return Components
- Fuel Connections
- Seals
- O-Rings
- Gaskets
Perkins M85T Fuel Injectors
Potential requirements can include:
- Complete Fuel Injectors
- Injector Nozzles
- Injector Sealing Components
- Injector Pipes
- Fuel Return Components
- Associated Hardware
What Are Possible Signs of Perkins M85T Injector Problems?
Possible symptoms can include:
- Difficult Starting
- Rough Running
- Uneven Cylinder Operation
- Excessive Exhaust Smoke
- Reduced Engine Power
- Increased Fuel Consumption
- Abnormal Combustion Noise
These symptoms do not automatically mean that an injector has failed.
Fuel quality, filters, fuel delivery, injection equipment, compression and airflow should also be considered.
Perkins M85T Fuel Injection Components
Potential requirements can include:
- Fuel Injection Equipment
- Injection Components
- Fuel Lift Pump
- Fuel Pipes
- Fuel Connections
- Pump Seals
- Gaskets
- O-Rings
Why Should Existing M85T Fuel Equipment Be Identified?
An older M85T may no longer have every fuel-system component originally installed when the engine was manufactured.
Previous repairs may have involved:
- Rebuilt Components
- Exchange Units
- Replacement Equipment
- Reconditioned Components
- Superseded Parts
Identification from the currently installed component can therefore be useful alongside the engine serial number.
Perkins M85T Fuel Filter Parts
Potential requirements can include:
- Primary Fuel Filters
- Secondary Fuel Filters
- Fuel Filter Elements
- Fuel-Water Separators
- Filter Housings
- Filter Seals
- O-Rings
- Drain Components
Why Is Fuel Filtration Important on the M85T?
Marine fuel tanks can accumulate:
- Water
- Sediment
- Corrosion Products
- Tank Debris
- Microbial Contamination
Contaminated fuel can contribute to injector wear, fuel-system damage, difficult starting and poor combustion.
Perkins M85T Turbocharger Parts
Because the M85T is turbocharged, the turbocharger and its supporting systems are important areas of engine maintenance.
Potential requirements can include:
- Complete Turbocharger
- Turbocharger Cartridge
- Compressor Components
- Turbine Components
- Bearings
- Seals
- Oil Supply Components
- Oil Drain Components
- Intake Connections
- Exhaust Connections
- Turbocharger Gaskets
- Mounting Hardware
What Are Possible Signs of an M85T Turbocharger Problem?
Possible symptoms can include:
- Reduced Engine Power
- Poor Acceleration
- Reduced Boost
- Excessive Exhaust Smoke
- Abnormal Turbocharger Noise
- Oil Leakage
- Increased Oil Consumption
- High Exhaust Temperature
These symptoms should be diagnosed before assuming that the turbocharger itself requires replacement.
Why Should the Cause of Turbocharger Failure Be Investigated?
A damaged turbocharger may sometimes be the result of another engine problem.
Possible contributing factors include:
- Restricted Oil Supply
- Poor Oil Drainage
- Contaminated Lubricating Oil
- Restricted Air Intake
- Foreign Material
- Exhaust-System Problems
- Excessive Operating Temperature
Installing another turbocharger without correcting the underlying cause can lead to repeated failure.
Perkins M85T Air Intake Parts
Potential requirements can include:
- Air Cleaner Components
- Air Filter Components
- Intake Hoses
- Intake Pipes
- Intake Manifold Components
- Turbocharger Connections
- Clamps
- Gaskets
- Seals
Can Restricted Airflow Cause Black Smoke?
Yes.
Insufficient combustion air can contribute to:
- Black Exhaust Smoke
- Reduced Engine Power
- Poor Acceleration
- Increased Exhaust Temperature
- Increased Fuel Consumption
Fuel delivery and injection condition should also be considered when investigating black smoke.
Perkins M85T Raw-Water Cooling System Parts
Potential requirements can include:
- Complete Raw-Water Pump
- Seawater Pump Components
- Flexible Impeller
- Pump Cover
- Pump Shaft
- Pump Bearings
- Mechanical Seals
- Cooling Hoses
- Seawater Pipes
- Connections
- Gaskets
- O-Rings
Why Is the Perkins M85T Raw-Water Pump Important?
The raw-water pump circulates seawater through the marine cooling circuit.
Reduced seawater flow can contribute to:
- Engine Overheating
- Increasing Coolant Temperature
- High Exhaust Temperature
- Reduced Heat Exchanger Performance
- Wet-Exhaust Cooling Problems
Poor seawater flow does not automatically mean that the raw-water pump itself has failed. The complete circuit should be checked.
What Should Be Checked When M85T Seawater Flow Drops?
Areas to investigate can include:
- Seacock
- Raw-Water Intake
- Sea Strainer
- Intake Hose
- Raw-Water Pump
- Flexible Impeller
- Pump Cover
- Cooling Hoses
- Heat Exchanger
- Downstream Cooling Passages
Perkins M85T Raw-Water Pump Impeller
The flexible impeller is a relatively small service component but has an important role in maintaining seawater flow.
If blades are missing from a damaged impeller, fragments may become trapped inside:
- Cooling Hoses
- Pipe Connections
- Heat Exchanger Passages
- Other Downstream Cooling Components
Installing a new impeller may not restore full cooling performance if fragments remain inside the circuit.
Perkins M85T Freshwater Pump Parts
Potential requirements can include:
- Complete Freshwater Pump
- Coolant Circulation Pump
- Pump Housing
- Pump Shaft
- Bearings
- Seals
- Gaskets
- O-Rings
Perkins M85T Heat Exchanger Parts
Potential requirements can include:
- Complete Heat Exchanger
- Heat Exchanger Core
- Tube Bundle
- Housing
- End Covers
- End-Cap Seals
- Raw-Water Connections
- Coolant Connections
- Gaskets
- O-Rings
- Seals
What Can Restrict an M85T Heat Exchanger?
Possible causes can include:
- Salt Deposits
- Scale
- Marine Growth
- Sediment
- Corrosion
- Broken Impeller Pieces
- Other Debris
Internal passages can become restricted even when the heat exchanger appears acceptable from the outside.
Why Can a Perkins M85T Overheat Under Load?
A partially restricted cooling system may provide enough cooling at idle but become insufficient as engine load increases.
Areas to investigate can include:
- Seacock
- Sea Strainer
- Raw-Water Intake
- Raw-Water Pump
- Impeller
- Cooling Hoses
- Heat Exchanger
- Thermostat
- Freshwater Pump
- Coolant Level
- Coolant Condition
- Exhaust Cooling Circuit
Both the seawater and freshwater circuits should be considered.
Perkins M85T Thermostat Parts
Potential requirements can include:
- Thermostats
- Thermostat Housing
- Thermostat Gaskets
- O-Rings
- Seals
- Associated Hardware
Perkins M85T Lubrication-System Parts
Potential requirements can include:
- Engine Oil Filters
- Oil Filter Elements
- Oil Pump Components
- Oil Cooler
- Oil Cooler Components
- Oil Pressure Components
- Oil Pipes
- Oil Lines
- Oil Pan Components
- Gaskets
- O-Rings
- Crankshaft Seals
Why Is Lubrication Important on the M85T?
Lubricating oil protects major components including:
- Crankshaft
- Main Bearings
- Connecting Rod Bearings
- Pistons
- Camshaft
- Valve Train
- Turbocharger
Because the turbocharger also depends on reliable lubrication, oil condition and oil supply are especially important.
Perkins M85T Oil Cooler Parts
Potential requirements can include:
- Complete Oil Cooler
- Oil Cooler Core
- Oil Cooler Housing
- Oil Connections
- Cooling Connections
- Gaskets
- O-Rings
- Seals
Perkins M85T Cylinder Head Parts
Potential requirements can include:
- Complete Cylinder Head
- Intake Valves
- Exhaust Valves
- Valve Guides
- Valve Seats
- Valve Springs
- Rocker Components
- Valve-Train Components
- Cylinder Head Gasket
- Valve Cover Gasket
- Injector Sealing Components
When Should an M85T Cylinder Head Be Inspected?
Cylinder-head inspection may become necessary following:
- Severe Overheating
- Coolant Loss
- Head-Gasket Failure
- Low Compression
- Valve Damage
- Coolant Leakage
- Abnormal Combustion
- Major Engine Overhaul
Inspection and measurements should determine whether the cylinder head can be reused, rebuilt or should be replaced.
Perkins M85T Pistons and Piston Rings
Potential requirements can include:
- Pistons
- Piston Ring Sets
- Piston Pins
- Piston Pin Bushings
- Retaining Components
What Can Worn M85T Piston Rings Cause?
Possible symptoms can include:
- Excessive Blow-By
- Increased Oil Consumption
- Reduced Compression
- Difficult Starting
- Exhaust Smoke
- Reduced Engine Power
Piston, piston-ring and cylinder condition should be evaluated together.
Perkins M85T Connecting Rod Parts
Potential requirements can include:
- Connecting Rods
- Connecting Rod Bearings
- Small-End Bushings
- Connecting Rod Bolts
- Associated Hardware
Perkins M85T Main and Connecting Rod Bearings
Potential requirements can include:
- Main Bearing Sets
- Connecting Rod Bearing Sets
- Thrust Bearings
- Thrust Washers
Crankshaft dimensions should be established before final bearing selection during overhaul.
Perkins M85T Crankshaft Parts
Potential requirements can include:
- Complete Crankshaft
- Main Bearings
- Connecting Rod Bearings
- Thrust Components
- Crankshaft Gear Components
- Front Crankshaft Seal
- Rear Crankshaft Seal
Why Should the M85T Crankshaft Be Measured During Overhaul?
An established crankshaft may previously have been:
- Polished
- Reground
- Repaired
- Replaced
Journal measurements help establish its current dimensions before the appropriate bearing specification is selected.
Perkins M85T Camshaft and Timing Parts
Potential requirements can include:
- Camshaft
- Camshaft Bearings
- Timing Gears
- Gear-Train Components
- Timing Covers
- Timing Cover Gaskets
- Valve-Train Components
Perkins M85T Gaskets and Seals
Potential requirements can include:
- Cylinder Head Gasket
- Valve Cover Gaskets
- Intake Gaskets
- Exhaust Gaskets
- Turbocharger Gaskets
- Raw-Water Pump Gaskets
- Freshwater Pump Gaskets
- Heat Exchanger Gaskets
- Oil Cooler Gaskets
- Injector Seals
- Front Crankshaft Seal
- Rear Crankshaft Seal
- O-Rings
- Complete Gasket Sets
- Engine Seal Kits
Perkins M85T Starter Motor Parts
Potential requirements can include:
- Complete Starter Motor
- Starter Solenoid
- Relays
- Electrical Connections
- Associated Hardware
Slow cranking does not automatically confirm starter failure. Battery condition, cables, terminals, grounds and control wiring should also be investigated.
Perkins M85T Alternator Parts
Potential requirements can include:
- Complete Alternator
- Alternator Components
- Belts
- Pulleys
- Belt-Tensioning Components
- Electrical Connections
Perkins M85T Electrical Components
Depending on the exact engine installation, potential requirements can include:
- Temperature Senders
- Oil Pressure Senders
- Switches
- Relays
- Wiring Components
- Electrical Connectors
- Alarm Components
- Shutdown Components
- Starter Components
- Alternator Components
Perkins M85T Exhaust-System Parts
Depending on vessel installation, potential requirements can include:
- Exhaust Manifold Components
- Turbocharger Exhaust Connections
- Exhaust Elbows
- Mixing Components
- Exhaust Gaskets
- Seals
- Clamps
- Associated Hardware
Wet-exhaust components should be inspected carefully because seawater and hot exhaust gases operate close together.
Perkins M85T Engine Overhaul Parts
Depending on inspection findings, overhaul requirements can include:
- Pistons
- Piston Rings
- Piston Pins
- Main Bearings
- Connecting Rod Bearings
- Connecting Rods
- Thrust Components
- Cylinder Head Components
- Intake Valves
- Exhaust Valves
- Crankshaft Seals
- Complete Gasket Sets
- Seal Kits
- Fuel-System Components
- Cooling-System Components
- Lubrication-System Components
More extensive repair requirements may include:
- Complete Cylinder Head
- Crankshaft
- Camshaft Components
- Fuel Injectors
- Fuel Injection Components
- Turbocharger
- Raw-Water Pump
- Freshwater Pump
- Heat Exchanger
- Oil Cooler
- Starter Motor
- Alternator
Is There One Standard Perkins M85T Overhaul Kit?
The appropriate overhaul package should be based on the actual engine condition and configuration.
Important considerations include:
- Engine Serial Number
- Engine Build Information
- Operating Hours
- Maintenance History
- Reason for Overhaul
- Cylinder Measurements
- Piston Condition
- Bearing Condition
- Crankshaft Measurements
- Cylinder Head Condition
- Turbocharger Condition
- Fuel-System Condition
- Cooling-System Condition
This becomes particularly important if the engine has undergone previous major repairs.
What Information Should I Provide for Perkins M85T Parts?
For accurate Perkins M85T Marine Engine Spare Parts identification, provide:
- Engine Model: Perkins M85T
- Engine Serial Number
- Engine Build Information
- Existing Perkins Part Number, if available
- Manufacturer Number From the Existing Component
- Part Description
- Quantity Required
- Clear Photographs
- Marine Gear Information Where Relevant
- Vessel Application
- Delivery Country or Nearest Port
For established M85T installations, photographs of the engine identification plate and currently installed component can be particularly useful when the original part number is unavailable.