Overview
MasterCraft's L-18 is the most powerful engine in the big block inboard category for 2007. Its 496 cubic inches crank out monster torque, as well as horses in the hundreds. Little wonder it has proved itself the worthy replacement for older GM powerhouses like the 454 and 502.
Standard equipment includes MasterCraft Cruise© (MasterCraft's private labeled version of Indmar's ETC - electronic throttle and cruise system). ETC allows the helm throttle control to electronically connect to the engine's ECM. Thus, throttle response is as quick and smooth. The Electronic Throttle Control with Cruise feature is a bonus to recreational water-ski and wakeboard families.
High-tech engineering features have enhanced the engine's smooth power delivery, fuel efficiency and long-term durability.
The 9.1:1 high-compression Vortec heads with their straight-flowing matched port design help the engine run both smoother and cleaner while delivering big-time power. The Vortec heads produce more usable power from every fuel charge.
The MPFI aluminum intake manifold improves cylinder-to-cylinder airflow distribution to achieve cleaner, more dependable combustion. Tuned runners enhance the already monster low-end torque, while delivering awesome power to top-end, too. It's brain is Delphi's most advanced water resistant ECM (Electronic Control Module) the MEFI-5 hardware/software system. The MEFI-5 system is custom calibrated by Indmar to provide maximum performance and drive ability. By custom calibrating the ECM to match hull design requirements and the intended boat application this process allows boat and motor to perform as one seamless unit. The three-dimensional system precisely manages fuel, ignition and air. It is programmed to deliver the power skiers' and wake boarders' need, plus the classic turnkey starts, unhesitating dependability and fuel efficiency that only Indmar can deliver.
The coil-near-plug ignition system is computer controlled and works without a distributor. It zaps out 25K per cylinder via long-lasting platinum-tip plugs for an ultra-powerful burn.
It carries Indmar's full 3-year limited warranty, the best in the business.
Certified: Three Stars Ultra-Low Emission by California Air Resources Board 2007.
Note: All MasterCraft Models are available as Salt Water Specific engines.
Experienced saltwater boaters will be the first to appreciate the extensive list of saltwater-specific details found in the MasterCraft SS series. All marinized parts are E-coated, an advanced electro-coat dip process that provides optimum protection against corrosion. Unlike paints or powder coating, E-coating completely covers both external and internal surfaces, creating a permanent-paint-to-metal bond. Will not peel. Will not crack. Corrosion will not put a dent in it.
SS Cooling systems are totally closed and corrosion free. Saltwater never enters an SS engine system. It uses only propylene-glycol/water coolant driven by a high-flow pump. Coolant tanks are easily accessible for filling and maintenance and are equipped with sacrificial anodes for extended life.
Each MasterCraft SS engine is protected by the same three-year limited warranty that backs every OEM installed MasterCraft engine.
General Specs
Displacement: 8.1L / 496 CID
Cylinders: V-8
Heads: Cast Iron (High-flow Vortec heads)
Block: Cast Iron
Bore & Stroke: 4.25 x 4.37
Compression Ratio: 9.1:1
Exhaust: 2 Piece Designed Manifold.
Fuel System: Multi-port EFI (High-torque, dual flow design)
ECM: Delphi MEFI-5 hardware/software system that is custom calibrated by Indmar.
Ignition: Coil-near-plug ignition (One 25K coil per cylinder)
Fuel Required: 89-octane minimum
Oil Type: Pennzoil Marine (SAE Heavy Duty 40W)
Oil Capacity: 10 quarts with filter
Oil Filter: Pennzoil PZ3
Spark Pugs: 41-983 (Platinum Tip)
Max RPM: 5400
Warranty: Factory-Backed 3 year limited warranty including fuel and electrical.
High Out-put 90 Amp Alternator light systems: Produces 40 amps at idle.
Heavy-Duty Sealed Wiring Harness:
High-Flow Vortec Heads In A Big-Block Engine:
Coil Near Plug Ignition:
Advanced Valve Train: Steel camshaft with marine-specific performance profile increases low-end torque for hole-shots, while lengthening the flat torque curve for excellent top end power.
Serpentine Alternator & Circ. Pump Belt:
Marine-Specific Circulating Water Pump Impeller:
Exclusive Multi-step Paint Process: To give maximum protection from rust and corrosion.
High-Torque Marine Camshaft: With hydraulic roller lifters delivering maximum performance.
Beltless, Crankshaft Driven Seawater Pump: Works better and lasts longer.
