Select a battery that meets all of the following specifications:
See full version: Mercruiser Battery Cable Sizing Requirements
Select a battery that meets all of the following specifications:
IMPORTANT: It is recommended (required in some states) that battery be installed in an enclosed case. Refer to regulations for your area. more
IMPORTANT: Boating industry standards (BIA, ABYC, etc.), federal standards and Coast Guard regulations must be adhered to when installing battery. Be sure battery cable installation meets the pull test requirements and that positive battery terminal is properly insulated in accordance with regulations.
IMPORTANT: Engine electrical system is negative (–) ground. here
IMPORTANT: Do NOT use a battery with wing nut connectors. more
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2012The 2012 with the 4.7 has 16 spark plugs.
5.7L Hemi Applications and Estimated Horsepower The engine displaces 5.7L or 348 CID, and at its introduction produced one horsepower per cubic inch. Upgrades to the 5.7L motor raised output to 390 horsepower.
Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.
There are three primary pros of HEMI engines when compared against standard V8 engines. … This allows for better temperature control of the engine and reduces the chances of the engine overheating. Another pro of HEMI engines is larger valves and increased space available between the valves.
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The Hemi engine, by design, does a better job of burning all the fuel in the cylinder. Also, because of its design versus a flat head, the surface area is smaller and that means less heat escapes, plus peak pressure can be higher. Also advantageous, is the size of the valves.
5.7 Hemi engines are good for 250-300 000 miles and more if properly cared for and regular maintenance is carried out. Early models suffered from valve seat issues which was rectified after 2008. It’s not uncommon to find high mileage 5.7 Hemi trucks running around today.