Overview

The Indmar 5.7L HO MPFI (Vortec 5700/350 CID) for 2007 offers even more with 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 to recreational water-ski and wakeboard families.

All 2008 Indmar 5.7L HO's feature the patented one-piece ETX/CAT (Extreme Tuned Exhaust with Catalyst). The most dramatic achievement for boater safety is ETX/CAT's substantial reduction of Carbon Monoxide (CO) gases in all part-throttle operating modes. Neither the California Air Resources Board (CARB) nor the Environmental Protection Agency (EPA) currently regulates CO emissions, but when they do Indmar is ready to meet or surpass those regulations.

There is no measurable engine power loss thanks to ETX/CAT's extreme tuned manifold/catalyst design. The ETX/CAT system is a free breathing, header style performance exhaust manifold designed to incorporate the catalytic converter as a compact assembly.

Certified: 4-Stars Super Ultra-Low Emission by California Air Resources Board 2007.

Add an Indmar-designed torque-tuned multi-port intake manifold, GM's high-flow Vortec heads and a high-lift roller cam for even more performance.

The Indmar 5.7L HO'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 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.

Outstanding performance and durability, all backed by Indmar's exclusive 3-year limited warranty, which includes both fuel and electrical systems.

General Specs

Displacement: 5.7L / 350 CID
Cylinders: V-8
Bore & Stroke: 4.00 x 3.48
Compression Ratio: 9.4:1 (High-flow Vortec heads)
Exhaust: ETX/CAT (Extreme Tuned Exhaust with Catalyst).
Fuel System: Multi-port electric fuel injection (MPFI)
ECM: Delphi MEFI-5 hardware/software system that is custom calibrated by Indmar.
Ignition: HVS High Voltage Switch Ignition System
Fuel Required: Unleaded, 89-octane minimum.
Oil Type: Pennzoil Marine (SAE 15W-40), service SJ/CG4
Oil Capacity: 5.5 quarts with filter
Oil Filter: Pennzoil PZ3
Spark Pugs: 41-993 (Platinum Tip)
Max. RPM: 5,200
Warranty: Factory-Backed 3 year limited warranty including fuel and electrical.
High Output 90-Amp Alternator: Produces 40 amps at idle.
Heavy-Duty Sealed Wiring Harness:
Exclusive Multi-step Paint Process: To insure maximum protection from rust and corrosion.
Beltless, Crankshaft Driven Seawater Pump: Works better and it lasts longer. Marine-Specific Circulating Water Pump Impeller:
Serpentine Alternator and Circulation Water pump Belt:
Advanced Valve Train: Camshaft with marine-specific performance profile increases low-end torque for hole-shots, while lengthening the flat torque curve for excellent top-end power. Hydraulic roller lifters allow use of fast-action cam lobes to boost power while retaining a quiet idle and reducing friction and wear.