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Engine - New Replacement Longblock Marine 18:1 CR 6.5L
Engine - New Replacement Longblock Marine 18:1 CR 6.5L

Engine - New Replacement Longblock Marine 18:1 CR 6.5L

Build to Order: Ships in 4-6 weeks
Part Number:6500101
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New 6.5L Marine OEM engine for all Peninsular Inboard engines, replaces 6.2L and 6.5L Turbo Marine Inboard engines and is a replacement engine for Airboat applications.

This is the latest version of the Peninsular Marine longblock engine with significant improvements from 6.2 and Pre-2001 model 6.5L Marine engines, includes steel (forged) crankshaft. This is a proprietary engine that is produced by Unique Diesel for use in Marine applications only. Depending on supply receipt of engine is 4-6 weeks.


  • Engine Longblock Assembly (engine, timing cover, balancer, covers, lift brackets)
  • Temporary oil pan to be replaced with your Marine Aluminum pan.
  • Block Heater (120 volt)
  • Oil Filter (filter and filter fitting)
  • Fuel Lift Pump (pump, mounting plate, push rod)
  • Timing Tab for Marine Mechanical Injection Pump
  • Block valley drain tube (safety component)
Engine features all metric fasteners, so if replacing a Pre-1999 model Peninsular Engine, please inquire about a metric fastener kit necessary for replacing your existing engine.

6.2L engine aluminum oil pan will not fit the 6.5L block, you can either purchase a new pan and trade in your old an or we can arrange to have your 6.2L pan machined to fit the 6.5L block.

Manufacturers warranty is just 30-days, as these are new engines, we extend that warranty to 90-days. Warranty requires components to be re-manufactured, replaced, and require the old core engine returned. Components and fuel system re-manufacturing must be performed and purchased from Unique Diesel.

Warranty requires replacement of:

  • Engine Oil Cooler
  • Aftercooler Gasket (aftercooler internal inspection/cleaning)
  • Air Filter Element
  • Thermostats - Engine and Bypass
  • Sea Water Pump Impeller
  • Engine Circulating Water Pump
  • Glow Plugs
  • Fuel Injection Pump must be rebuilt or replaced
  • Fuel Injectors must be replaced with our re-manufacured or new units.
  • Injection pump must be degree timed (no timing by ear).
Note about replacement components: The components required to be replaced or re-manufactured (if re-buildable) are for the purpose of durability of the engine, these items are the minimum you should consider replacing, there are much more items (like hoses) that should be replaced but can be optionally sourced. Fuel system components are mandatory because when an engine is due for replacement the fuel system components are worn out as well. Defective fuel system components (pump and injectors) can cause prompt damage to a new engine and will cause the engine to perform poorly if not absolutely correct.

This item can be ordered on this store but not finished paid for online. Payment via traditional methods, options available during checkout. Optionally, a credit card cab be used via manual invoice system (outside of store) which requires a Credit Card Authorization form to be signed and returned, and a credit card courtesy fee will be applied to final invoice amount. Payment must be completed within 1 week of purchase/reservation or order will be cancelled and cancellations risk losing store privileges.

Shipping and Handling will be calculated and invoiced separately, requires freight access. Ships Internationally via Cargo or Air Freight.

Core engines must be returned within 30-days, starting the date from delivery. Freight recovery of core will be arranged by Unique Diesel, actual cost of return freight will be deducted from core return amount. We get extremely good rates, so this is reasonable. Additionally, lift gate residential service not available for core returns and must be delivered to freight terminal instead.

Note the Engine Preparation Options.

Engine can be ground in specific areas to prepare clearance for Peninsular Marine Manifolds, requires un-crating engine and performing operation. If unit is being shipped via Air Freight (typically international) the engine must be free of oil, new engines come with break-in oil in the pan, so engine much be un-crated and drained of oil and a new filter installed (that is dry).