Services - Engine Upgrade Packages



Teague Custom Marine is excited to offer engine upgrade packages for several Mercury Racing engine models. These upgrade packages are complete engine rebuild and upgrade programs that maximize your engine’s potential with increased overall performance and durability. Designed for use with 91 octane pump gas.



Teague Custom Marine Mercury Racing Engine Upgrade Packages:

Mercury 500EFI to TCM 600 EFI

• 605 HP and 650 TQ on 91 octane!

• 6 Month Warranty

• 5600 RPM Redline, 509 cu.in., hard anodized aluminum heads, heavy duty fuel system, upgraded camshaft and valvetrain components, increased compression, ECM calibration, larger throttle body, retains stock low profile intake and plenum.

Mercury 525EFI to TCM 625 EFI

• 625 HP and 660 TQ on 91 octane!

• 6 Month Warranty

• 5600 RPM Redline, 509 cu.in., cylinder head chamber and port blending, increased compression, upgraded camshaft and valvetrain components, ECM calibration

Mercury 525EFI to TCM 850 EFI

• 890 HP and 860 TQ on 91 octane!

• 6 Month Warranty

• 6200 RPM Redline, 509 cu.in, Whipple Supercharger and intercooler kit, lowered compression, cylinder head chamber and port blending, upgraded camshaft and valvetrain components, ECM calibration

Mercury 600SCi / 700SCi to TCM 875 EFI Full Rebuild / Upgrade

• 875 HP and 875 TQ on 91 octane!

• 6 Month Warranty

• 6200 RPM Redline, 509 cu.in., heavy duty fuel system, dual stage water pump, CNC ported heads, hi-flow arrestor, ECM calibration, includes adjustable water pick-up and dump, as well as boat side fuel plumbing.

Mercury 850SCi / 1025SCi / 1075SCi to TCM 1275 EFI Full Rebuild / Upgrade

• 1275 HP and 1100 TQ on 91 octane!

• 6 Month Warranty

• 7000 RPM Redline, 565 cu.in., new Whipple Quad Rotor 2.9L compressors, custom camshaft and upgraded lifters, indestructible steel T&D shaft rocker upgrade, ECM calibration

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Please call Teague Custom Marine at (661) 295-7000 for further specifications, details, and pricing

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