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Our Listings : Mercury Racing Rebuilt 525 EFI

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Date Added: 03/10/2021
Last Updated: 03/10/2021
Refresh your 500 EFI Mercury Racing engine while adding a bit of horsepower! A true marine rebuild that's drop in ready to run. 580 Horsepower @ 5400 RPM 605 FT/LBS of Torque @ 4500 RPM Runs on 91 Octane with 9.10:1 Compression Block: Magnafluxed, re-bored & honed to 4.5" gen VI Chevrolet big block freshly align honed. Rotating Assembly: SRP/JEP Forged Aluminum Pistons, 9.2:1 Compression Valvetrain Hydraulic Roller Camshaft Trend Performance Chromoly 1-Pc. .080" Wall Pushrods Scorpion 1.7 Ratio Full Roller Aluminum Rocker Arms Hydraulic Roller Lifters Hydraulic Roller Valve Springs Heads: GM Reconditioned, 2.25" Stainless Steel Intake Valves, 1.88" Iconel Exhaust Valves Also Included: Melling Hi-Volume Oil Pump W/ Tig Welded HD Pickup Roller Timing Set Clevite CL-7 "H" Series Rod/Main/Cam Bearings Fel-Pro Head Gaskets New Head Bolts Completely Assembled & Internally Balanced Dyno Sheets Included *Core Required* LOOKING FOR MORE POWER? Upgrade to 700 HP/675 FT-LB ( See 540 CI upgrade)
Ad Number: 79506
Price: $12995
First Name: Bill
Last Name: Lawson
Company Name: ATECO Engine & Dyno Shop
Company Website:
Phone: 847 623-2737
Phone 2:
City: Ingleside
State: IL
Zip: 60041
Year: 525 EFI
Make: *Core Required*
Model: 580 HP
E-mail: Reply to Ad

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