Engine Parts - EFI Upgrade Kits

135 HP Verado Stage 1
Your Price:
$565.99

135 HP Verado Stage 1

485CM-135VER

135 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


150 HP Verado Stage 1
Your Price:
$565.99

150 HP Verado Stage 1

485CM-150VER

150 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


175 HP Verado Stage 1
Your Price:
$565.99

175 HP Verado Stage 1

485CM-175VER

175 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


200 HP Verado Stage 1
Your Price:
$565.99

200 HP Verado Stage 1

485CM-200VER

200 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


225 HP Verado Stage 1
Your Price:
$565.99

225 HP Verado Stage 1

485CM-225VER

225 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


250 HP Verado Stage 1
Your Price:
$565.99

250 HP Verado Stage 1

485CM-250VER

250 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


275 HP Verado Stage 1
Your Price:
$565.99

275 HP Verado Stage 1

485CM-275VER

275 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


300 HP Verado Stage 1
Your Price:
$565.99

300 HP Verado Stage 1

485CM-300VER

300 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


305 MPI Stage 1
Your Price:
$565.99

305 MPI Stage 1

485CM-305MAG

305 MPI Stage 1

The stage 1 maximizes the power output of the stock engine by running 91 octane or better vs the stock 87 octane, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 5600 RPM limit
  • 5% - 8% power increase over stock
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


350 HP Verado Stage 1
Your Price:
$565.99

350 HP Verado Stage 1

485CM-350VER

350 HP Verado Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The stage 1 maximizes the power output of the stock engine by running 90 octane or better, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 6900 RPM limit vs stock 6650 RPM
  • 25HP gain/15 TRQ
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


350 Mag Stage 1 (DTS)
Your Price:
$565.99

350 Mag Stage 1 (DTS)

485CM-350MAG

350 Mag Stage 1 (DTS)

The stage 1 maximizes the power output of the stock engine by running 91 octane or better vs the stock 87 octane, increasing the maximum spark advance, increased ignition dwell from the ignition coil and maximized air-fuel ratio. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds. Customers report far cleaner transoms (less soot) with increased throttle response.

    Key features:
  • Hi-performance PCM calibration
  • 5600 RPM limit
  • 5% - 8% power increase over stock
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


496 HO Stage 1
Your Price:
$660.99

496 HO Stage 1

485CM-496HO

496 HO Stage 1

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The Stage 1 system is a computer re-calibration that increases the maximum rpm level while maintaining a conservative timing curve for 89-octane gas. This calibration is designed to be conservative and reliable like stock, but a higher maximum rpm level for more prop selection. Stage 1 achieves only modest power increases such as 8-10 foot-pounds of torque and 8-10 horsepower.

    Key features:
  • 5450 RPM limit (5250 on Base models)
  • 89 octane safe

NOTE: You will have to remove and send in your ECU to have this process done.


496 HO Stage 1 (DTS)
Your Price:
$660.99

496 HO Stage 1 (DTS)

485CM-496HOD

496 HO Stage 1 (DTS)

 

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The Stage 1 system is a computer re-calibration that increases the maximum rpm level while maintaining a conservative timing curve for 89-octane gas. This calibration is designed to be conservative and reliable like stock, but a higher maximum rpm level for more prop selection. Stage 1 achieves only modest power increases such as 8-10 foot-pounds of torque and 8-10 horsepower.

    Key features:
  • 5450 RPM limit (5250 on Base models)
  • 89 octane safe

NOTE: You will have to remove and send in your ECU to have this process done.


496 Mag Stage 1
Your Price:
$660.99

496 Mag Stage 1

485CM-496MAG

496 Mag Stage 1

 

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The Stage 1 system is a computer re-calibration that increases the maximum rpm level while maintaining a conservative timing curve for 89-octane gas. This calibration is designed to be conservative and reliable like stock, but a higher maximum rpm level for more prop selection. Stage 1 achieves only modest power increases such as 8-10 foot-pounds of torque and 8-10 horsepower.

    Key features:
  • 5450 RPM limit (5250 on Base models)
  • 89 octane safe

NOTE: You will have to remove and send in your ECU to have this process done.


496 Mag Stage 1 (DTS)
Your Price:
$660.99

496 Mag Stage 1 (DTS)

485CM-496MAGD

496 Mag Stage 1 (DTS)

 

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The Stage 1 system is a computer re-calibration that increases the maximum rpm level while maintaining a conservative timing curve for 89-octane gas. This calibration is designed to be conservative and reliable like stock, but a higher maximum rpm level for more prop selection. Stage 1 achieves only modest power increases such as 8-10 foot-pounds of torque and 8-10 horsepower.

    Key features:
  • 5450 RPM limit (5250 on Base models)
  • 89 octane safe

NOTE: You will have to remove and send in your ECU to have this process done.


496 Magnum Base Stage 2 Kit
Your Price:
$707.99

496 Magnum Base Stage 2 Kit

485MK-5350

496 Magnum Base Stage 2 Kit

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The Stage 2 maximizes the power output of the stock engine by running 91 octane or better, increasing the maximum spark advance, increased ignition power from the individual coils, denser air charge from the low temp thermostat and maximized air-fuel ratio in each individual cylinder. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds.

    Key features:
  • Hi-performance PCM calibration
  • Low-temp thermostat
  • 5450 RPM limit
  • 5% - 8% power increase over stock
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


496 Magnum HO Stage 2 Kit
Your Price:
$707.99

496 Magnum HO Stage 2 Kit

485MK-5355

496 Magnum HO Stage 2 Kit

With full PCM control, we can offer customers many different options for stock and modified engines. Whether its the Stage 1 and 2 packages or custom calibrations for your application, we can easily handle it with incredible accuracy and a ultra fast turn-around time.

The Stage 2 maximizes the power output of the stock engine by running 91 octane or better, increasing the maximum spark advance, increased ignition power from the individual coils, denser air charge from the low temp thermostat and maximized air-fuel ratio in each individual cylinder. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds.

    Key features:
  • Hi-performance PCM calibration
  • Low-temp thermostat
  • 5450 RPM limit
  • 5% - 8% power increase over stock
  • Increased acceleration with increased torque output

NOTE: You will have to remove and send in your ECU to have this process done.


500 EFI Tuned & Bored Throttle Body 1000CFM
Your Price:
$629.99

500 EFI Tuned & Bored Throttle Body 1000CFM

620-15530

500 EFI Tuned & Bored Throttle Body 1000CFM

Hardin Marine has taken your factory Mercury Racing EFI throttle body and combined their precision machining and tuning experience into a power producing option for all Mercury 500/525 EFI applications. High flow throttle bodies wake these engines up.

These “Monoblade” flow 1000 CFM to match Mercury’s 525HP EFI engine. The “Monoblade” has self lubricating bronze bushings for the shaft to rotate on, knife edged stainless steel throttle blade, Stock OEM sensors and throttle cable mounts in the original location. 25 HP gain is available with recalibration of the ecu and the throttle valve. Port matching to the plenum chamber and the center divider is required to be removed from the inlet of manifold allowing room for the throttle body blade to move freely.

Now that the units match the 525 efi size. This takes a 525 gasket where it mates to the manifold not the original o-ring that the 500s had. One bolt hole needs to be clearance d slightly once the gasket is laid on the throttle body. The front is machined and drilled/tapped 5/16 fine thread and now accepts the 525 flame arrestor.

Optional High Flow flame arrestor is suggested #625-5250

Note: You will have to remove and send in your throttle body to have this process done. This is not a shelf item. Please call our technical staff for any questions or assistance on the process.

Sold as an Exchange, $500.00 Core Charge.

525 HP EFI Stage 1
Your Price:
$755.99

525 HP EFI Stage 1

485CM-525HP

525 HP EFI Stage 1

The Stage 1 system is a computer re-calibration that increases the maximum power by more than 25 HP and 30 pounds of torque.  This also increases the low rpm power range for a decrease in plane time and a noticeable gain in acceleration. The factory rpm limiter is also increased, giving customers the ability to increase top speed MPH with proper propping. The stock RPM limit of 5400 is modified to 6000 rpm where peak power ends.

    Key features:
  • Hi-performance PCM calibration with MPH gains of 1-3mph
  • Increased horsepower for increased top speed MPH
  • Increased low-speed torque for decreased plane time
  • Increased low, mid and high speed torque for better acceleration and throttle response
  • Increased spark at low and mid speeds for increased engine efficiency
  • 6000 RPM limit vs. stock 5400 RPM limit giving increased propping range and increased horsepower
  • 91 octane safe (RON+MON)/2
  • Stock idle, starting and drive-ability is maintained
  • Fully compatible with all Smartcraft equipped vessels
  • Custom calibrations available upon request

NOTE: You will have to remove and send in your ECU to have this process done.


8.2/502 Mag Base (DTS/ETC) Stage 1
Your Price:
$755.99

8.2/502 Mag Base (DTS/ETC) Stage 1

485CM-82MAG1D

8.2/502 Mag Base (DTS/ETC) Stage 1

A whopping 50 horsepower and 35 foot pounds of torque increase while maintaining use of 89 octane. This works with both the mechanical cable and digital throttle (DTS) as well as engines equipped with and without catalytic converters. This performance calibration of the stock PCM features a 250 RPM limiter increase and a revised fuel and spark curve to better enhance performance.

NOTE: You will have to remove and send in your ECU to have this process done.