Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm — Stage 1 file (+55 hp)
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Stage 1 file for Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm
Target +0 hp. Custom development for your engine.
Chip tuning for Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm ECU
Mercury Marine MerCruiser 4.2L 300 (I) 300 HP 300hp (221kW) 645Nm — marine diesel engine of the marine segment of the Brunswick Corporation group (США, 1939). Stage 1 chip tuning raises power from 300 to 355 hp (+55 hp, +18%) and torque from 645 to 770 Nm (+125 Nm).
Mercury Marine is the global leader in outboard motor production volume. Mercury Verado is the flagship range of high-output outboard motors. Mercury Marine is an American marine engine manufacturer, founded in 1939. Mercury Marine builds mainly petrol engines.
Marine chip tuning is a narrow niche, with calibration tailored to propeller load and operating conditions. Marine engines are a specialised chip tuning segment focused on torque and fuel consumption. High-output Mercury Verado are premium outboard motors.
Frequently asked questions
How many horsepower does the Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm reach after a remap?
Stage 1 for the Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm adds +55 hp — power increases from 300 to 355 hp (+18%). Torque rises from 645 to 770 Nm (+125 Nm).
What does a Stage 1 remap of the Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm include?
Stage 1 chip tuning of the Mercury Marine MerCruiser 4.2L 300 is a rework of the ECU maps: boost pressure, ignition advance, target lambda and the removal of factory torque limiters. The gain is +55 hp with no hardware changes.
Is Stage 1 safe on the high-output Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm?
Stage 1 on the powerful Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm “lifts” the factory limiters with no hardware changes. The gain is noticeable in the mid and upper range. There is headroom left for moving to Stage 2 (downpipe + intake + intercooler).
How much does Stage 2 add on the Mercury Marine MerCruiser 4.2L 300?
Stage 2 for the Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm is Stage 1 plus hardware changes: a downpipe, a larger intake and a performance intercooler. The gain is considerably higher, but it requires professional component selection.
What happens to the Mercury Marine MerCruiser 4.2L 300 warranty after chip tuning?
The factory warranty of the Mercury Marine MerCruiser 4.2L 300 does not remain valid after Stage 1 — the manufacturer withdraws its obligations once the ECU software is changed. CHIPOK provides its own warranty on its work and support.
How long does remapping the Mercury Marine MerCruiser 4.2L 300 take?
On the Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm: OBD flash 25-30 minutes, Bench (if required) about an hour. The file processing itself takes 5-30 minutes once the original bin is received.
Is the original file kept when chip tuning the Mercury Marine MerCruiser 4.2L 300?
Yes, the original ECU firmware of the Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm is kept and can be flashed back at any time. Returning to stock via OBD takes 25-30 minutes.
What is the price of a Stage 1 remap for the Mercury Marine MerCruiser 4.2L 300?
Stage 1 for the Mercury Marine MerCruiser 4.2L 300 300 HP 300hp (221kW) 645Nm is paid for with CHIPOK credits (1 cr = 1 €). The final amount is set in the calculator, taking the extra options (off functions) into account.