Overview
For 2007 Indmar's Saltwater Specific 8.1L HO SS inboard engine now features Indmar's ETC system (Electronic throttle and cruise) now standard. The Indmar developed system allows the helm throttle control to electronically connect to the engine's ECM. Throttle response is quick and smooth. The Electronic Throttle Control with Cruise feature is a bonus for everyone from cruising families to fishermen, wakeboarders to waterskiers.
The Indmar 8.1L HO SS is a multi-port EFI inboard engine marinized specifically for saltwater applications, such as bay runabouts, small cruisers, sportfish and workboats. It has huge low and mid-range torque capabilities. 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 cruising families, fishermen, 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.
Saltwater boaters will appreciate Indmar's detailed touches, such as stainless steel for all external engine fasteners; high-mounted starters and alternators with remote oil filters; and bronze naval-grade crankshaft-driven water pumps.
Full freshwater cooling is standard. Because it is a totally closed system, including exhaust manifolds, saltwater never enters the engine system. Coolant tanks use a propylene glycol/water mix and are easily accessible for filling and maintenance.
Marinized components are all E-Coated for optimum protection against corrosion. Unlike industry standard paint, E-Coat is an advanced process that completely covers both exterior and internal surfaces, creating a permanent chemical bond between metal and paint. It will not peel or crack.
The Indmar 8.1L HO is backed by Indmar's 3-year limited warranty and customer service.
Certified: Three Stars Ultra-Low Emission by California Air Resources Board 2007.
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.
