ATK Chevy 502 Marine Engine 515HP Base HP95

Looking to replace your existing or worn-out marine engine? Get this replacement engine for a Mercruiser 450hp 502ci marine engine. Designed to exceed expectations, this engine offers unmatched performance and lasting durability.

Engine Specifications:

• Horsepower: 515 @ Crank - Estimated prop power 450HP
  
• Torque: 570 @ Crank - Estimated prop power 500TQ
  
• Block: Dart Big M 9.8 4 Bolt Main 1pc Seal
  
• Bore/Stroke: 4.470 x 4.000
  
• Displacement: 502 C.I.D.
  
• Crankshaft: Scat Nodular Iron 4.000" Stroke Externally Balanced
  
• Connecting Rods: Scat 4340 Forged I Beam 6.385" ARP 8740 Bolts
  
• Pistons: Forged
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 8.9:1 Compression
  
• Camshaft: Hydraulic Roller
  
• Camshaft Specifications: 224/224 @050 .483in/.483ex 115LSA
  
• Camshaft Bearings: Installed & Clocked to OEM Position
  
• Cylinder Heads: Dart Iron Eagle Rect-Port 119cc/308cc 2.25/1.88
  
• Freeze Plugs: Brass Installed & Sealed
  
• Rocker Arms: Stamped Steel 1.7 Ratio
  
• Oil Galley Plugs: Installed & Sealed
  
• Oil Pan: OE 5qt.
  
• Weight: 565
  

ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty. Check out our three stages of performance Ford Engines: they are separated by level of dress.