Marine Tuning Mercruiser 8.1L | V8 425HP

Original price was: $649.00.Current price is: $549.00.

Marine Tuning Mercruiser | +/—| 15 % Performance | Torque and fuel saving

As a preventive service, we will apply a new conformal coating and reseal the unit to prevent future water intrusion.

Experience the full potential of enhanced power and dependability through our advanced Marine tuning services. Our experienced team guarantees a remarkable boating journey, surpassing all expectations with unmatched performance. Elevate your boating experience with our premium Marine tuning services. Optimize your boat’s performance with ECM tuning. The ECM is an integral component of many marine engines, such as the Mercury Mercruiser, Mercury Verado, Mariner 135/150 HP, Motorola, and other brands. Performance tuning for these marine ECMS is crucial for optimal operation.

Marine Tuning Mercury Mercruiser 8.1L V8 425HP

PCM0308M | 885557 | High Power Boat.



Marine Tuning Mercruiser 8.1L | V8 425HP

Marine Tunig for Mercury Marine PCM 0308 | 885557. Unlock exceptional power and reliability with our advanced Marine tuning services. Our expert team will elevate your boating experience to new heights, ensuring an unparalleled performance that will exceed all your expectations.

Get ready to take your boat to the next level with our top-of-the-line Marine tuning services.

Also, as a preventive service, we will apply a new conformal coating and resealing of the unit to prevent future water intrusion.

When it comes to marine engines, tuning is not just a luxury; it’s a necessity for achieving optimal performance. Your PCM0308M has tremendous potential waiting to be unleashed, and tuning allows you to tap into that power.

Tuning also plays a vital role in increasing overall horsepower and torque output. With precise adjustments to your engine’s settings, you’ll experience improved acceleration, better throttle response, and increased top speed. Whether racing against fellow boaters or enjoying a leisurely cruise with friends and family, these enhancements will enhance your boating experience.

Manufacturer Part Number: PCM0308M | 885557

PN: 885557-031, 856496-13, P180901003, PCM42640806, 885557-007, PCM31421160,

Applications: Mercury 200DFI, Mercury 225DFI, Mercury Verado, Mariner 135/150 HP.

8.1L V8 425HP (PCM0308-ECM070X-ECM555)

6.2L V8 MPI/350HP (ECM070X)

4.3L V6 MPI/265HP(ECM555)

4.3L V6 MPI/190HP (ECM0701)


Marine Tuning Service time

The software programming now supports the increased power. Our technology improves boat performance, satisfying the needs of boat owners, mechanics, and marine technicians.

The service will take approximately two to three business days to complete.


All you need to do is ship your unit to us, and we will diagnose the faults and ship the fixed unit back.

Why trust us

Our engineering team has over 15 years of experience, more than 10K repaired ECMs, and the latest simulation technology. We are always happy to assist you with any technical assistance we can. Feel free to contact us to discuss the faults you are experiencing before sending in your parts.

ECM Engineering USA / ECM Repair USA


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Additional information

Weight105 oz
Dimensions11 × 14 × 7 in