Search by Model, Part or Item Number
Highlights & Update
Backed by an efficient European manufactory producing exclusively for Magnum Tuning, we have always strived to provide the best possible service experience and quality, and deliver the most ammo to your ride for your hard earned bucks. Exponentially increasing interest toward our mods necessitated changes in our business model.
Due to high demand for Magnum Upgrades magnumtuning.com has operated as a Wholesale Site since 2022.Dedicated Human Technical Support for retail orders ceased to exist.
Limited number of products are available for retail purchase until 06/30/2024.After this date you can buy our upgrades from local distributors and resellers or feel free to check out our repetitive retail offers under Highlights & Update tab.
We set up an efficient semi-automated Support Center available 24/7 which serves all your needs be it a question about tracking numbers or wiring instructions for a tuner. Don't hesitate to get instant answer to your question.RUSH-RUSH Help Center >>> replaced former Magnum Tech Support.
Thank you for shopping with Magnum Tuning.
Magnum Tuning Highlights & UpdateLast Updated on 04/19/2024
European Upgrades only. * From-stock Shipping by our US 3PL shipper. * Semi-automated 24/7 RUSH-RUSH Help Center replaced Human Tech Support.Read more >>>
Q:
A:
- close
- Home
- Boat Performance Chip - Inboard / Outboard Performance Part
- Mercury 50 ELHPT 4 MAGNUM Smart-Tune-X Boat Fuel Tuner Performance Module
- SPECS - W. THEORY
- INSTALL / MANUAL
- HIGH NOTES / Tips
- TECH-TRAINING
Description
With Mercury 50 ELHPT 4 programmable ECM Tuning in a short time you’ll receive 18% addend raw Power Output better sliding out and torque throughout the RPM range. This wondrous Magnum Fuel Tune will adeptly and effortlessly overwrite the lean factory fuel injection settings to remove the strangleholds being applied by manufacturers because of stringent requirements they are ruled by. Revamp your marine engine’s Power Output and wave adieu to the laggard stock fuel trim settings. Magnum’s ECM chip will reprogram the Engine Computer’s fuel delivery to Free up your Mercury 50 ELHPT 4’s full Output. FOR CORRECT FITMENT PLEASE ACKNOWLEDGE IT IS IMPORTANT TO DOWNLOAD THE HIGH NOTES TIPS PDF ABOUT YOUR Mercury 50 ELHPT 4 Performance Chip.
Mercury 50 ELHPT 4Performance Chip will fool engine sensors’ signals processed by the Engine Computer, ending up with a horsepower-optimized adjustment to the fuel mapping software, to crank up the Output, kick-out time and engine responsiveness; throughout the RPM range.
This Boat Remapper Chip wires inline with the hot return wire of the Intake Air Temp sensor (IAT or MAT) that can be a 2-wire sensor or the part of the compact 4-wire (up to 6) Mass Air Flow Meter; also referred to as (MAF, TMAP, etc.) unit. The Engine Management Chip also hooks up into the O2 Sensor’s harness to trick the limitations imposed by the Powertrain Control Module and that would hold back the fuel mapping software remap from going through. With Automatic Temperature Compensation (ATC) you can stay calm, your vessel will outrun any other Mercury 50 ELHPT 4, be it stock or perked up.
- Are you wise to this? The Intake Air Temp plays major role in the computing of fuel map programming. The majority of competitors’ Remap Chips use the stock Inlet Temp sensor’s signal which is being spoofed whereas Smart-Tune ECU Tune boasts a two-wire sensor add-on Manifold Absolute Temperature sensor which makes the product able to set the perfectly sound and optimum fuel mapping.
Let your Mercury 50 ELHPT 4’s power plant run at its best Horsepower Potential when you have to squeeze out the most horsepower of the power plant. Mercury 50 ELHPT 4 Smart-Tune Race Tuner Kit undoubtedly is designed to successfully Bolster the Horsepower of your substantially restricted factory motor. Cast away the laggard stock fuel programming. Magnum Tunung’s Mercury 50 ELHPT 4 ECU Tuner will give notable horsepower-gain.
On electronic fuel-injected Boats you are definitely not be able to to change the Air Fuel Ratio in order to produce more active Performance with re-jetting, like on old carbureted engines. Mercury 50 ELHPT 4 Smart-Tune Race Tuner Kit's primary reason to be hooked up is to perform this adjustment to Revamp your watercraft’s Horsepower Potential. This Five Star Quality Magnum Tuning Product impacts neither your motor’s reliability nor its lifespan.
If you are capable to execute a few electrical wiring you are capable to surely wire in this wondrous Fuel Tuner Do-It-Yourself lickety-split. Unlock every bit of Engine Performance in your power plant with the Excellent Quality Magnum Smart-Tune Mercury 50 ELHPT 4 Performance Chip.
Specs
Claims
- 17% extra Horsepower and Torque
- 22% faster acceleration throughout the RPM range
- 6% fuel mileage improvement
- Higher top end speed (until redline limit)
- Improved throttle response w/o flat spots
Features
- Hassle-free installation
- Dual-mode emission control feedback system
- You can go back to factory settings
- 10-year warranty
- Full adjustability w/ high-resolution LCD display
- Remap correction w/Auto Temperature Compensation
- In-built oxygen sensor control (for emission controlled models only)
- Waterproof design (not submersible)
Taps into
- Intake Air Temp and Oxygen Sensor (if any)
- Ignition key activated +/- 12V power feed
Required skill
- Minimum electrical and mechanical skill
Dimensions
- (L x W x H) w/o knob: 5 3/4" 146 mm x 2 7/8" 73 mm x 1 1/2" – 38.1 mm
- Weight: 0.77lbs - 0.35 kg
- Harness length: 5' - 1.5m
Packing List
- 1 x Smart-Tune-X Controller
- 6 x Bullet Connector
- 2 x Scotch Lock
- 2 x Zip Tie
- 6 x Heat Shrink Tubing
- 1 x Installation Instructions
Download Installation Instructions
The fuel trim on fuel injected up-to-date vessel’s are controlled by the Electronic Engine Management, also referred to as ECU, or ECM. Most factory ECU's are set to maintain a 14.7:1 air/fuel ratio. This is known as a stoichiometric fuel mix however this is a lean mix as well because of rigorous emission standards the manufacturers have to comply with. On new generation fuel injected motors, from the early 80's you have been unable to adjust the A / F ratio in order to add more HP Output to the powertrain - with rejetting, like on carbureted models. Smart-Tune-X is designed to commit this adjustment to achieve maximum performance boost. Lambda-Boost mode (applies on emission controlled watercraft’s only)
- Dual-mode oxygen sensor control system reads constant feedback through fluctuation voltage or resistance signal of stock oxygen sensor. Smart-Tune-X identifies the sensor type and voltage range automatically. After alterations are being made to the fuel maps, oxygen sensor senses rich mix that would cause the ECU lean out the mix as opposed to our intent. Chip’s Exhaust Gas Oxygen Sensor control system overrides that restriction would be employed on the fuel trim by stock Electronic Control Unit programming.
- Standard mode provides an average remap on the fuel trim whilst advanced lambda-mode guarantees zero restriction from the oxygen sensor on emission controlled watercraft’s.
- The inbuilt oxygen sensor control system automatically identifies oxygen sensor signal type, probe material and range, ie. voltage- or resistance-based, narrowband or wideband, zirconium or titanium sensor. Depending on engine management type or performance parts preinstalled, check engine light (CEL) might be triggered in Lambda-Boost mode. If so, turn this function off.
In-built Auto Temp Compensation - ATC
Fine fuel trim adjustment ensures maximum Power. This is essentially what we achieve through the implementation of ATC. With automatic temperature compensation, the amount of fuel delivered to the combustion chamber is automatically corrected, so that new air to fuel mix remains optimum throughout engine operation. Even though the physical volume of fuel changes as its temperature changes, the energy value per gallon remains constant.
Customer Reviews for Smart-Tune-X Boat Fuel Tuner Performance Module
Average Rating
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
159 Customer Reviews
premium rate 4.5 up to 5 star82%
good rate 3.5 up to 4 star9%
average rate 3 star4%
poor rate 2 up to 2.5 star4%
very poor rate below 2 star1%
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
superfast
Reviewed by Cordell W.(Orange County, California, USA), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Volvo Penta KAD43 DP-E 235HP – Monday, 2:49 PM
Superfast shipping, smooth transaction
11 of 13 people found this review helpful.
Was this review helpful?
YesNo
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
performs as claimed
Reviewed by John(Flint, United Kingdom), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for G3 Angler V178F powered by Yamaha VF90LA – Sunday, 11:17 AM
Magnum brand name has recenlty slipped under lot of US forums' radar while the majority had not posted the best evaluations but I decided not to follow the herd and I was not mistaken Awsome google ranking helped me to weigh out pros and cons. Product's design is a lil outdated unlike eyecatching programmers for double or even triple price and a definite drawback to be prevented from simply plugging in to a connector but my tests proved smart tuner performs as claimed to do and this is what makes sense. I recommend it with no reservation.
1 of 1 people found this review helpful.
Was this review helpful?
YesNo
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
runs and averages better
Reviewed by harold w.(Limestone, New York, USA), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Sport Nautique powered by PCM 5.8 EFI Pro Boss – Sunday, 9:02 AM
i've been always pretty sure my outboard would be in jeopardy if i dump stock fuel settings but obviously I was definitely wrong. Right now I'm under the assumption I passed up the opportunity to pep up my trucks and this motor for years. Boat runs and averages better on fuel. Next i gonna try higher octane gas and revise my review. Thanks guys for your persistent help regarding my wiring questions.
15 of 17 people found this review helpful.
Was this review helpful?
YesNo
(4/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
beyond expectations
Reviewed by Harry B., roof plumber(Mishicot, Wisconsin, USA), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Mercury 90 Optimax – Sunday, 2:42 AM
results were beyond expectations but difficult to mount it undercowling and adjust it with the remote
9 of 10 people found this review helpful.
Was this review helpful?
YesNo
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
like
Reviewed by Pankratios E.(Chios, Greece), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Malibu Wakesetter 21 MLX powered by Monsoon 6.2L 350HP CAT – Wednesday, 9:07 PM
like
2 of 9 people found this review helpful.
Was this review helpful?
YesNo
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
eruptive horse power
Reviewed by marquise y.(Miami Springs, Florida, USA), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Kodiak 8.2 MPI – Friday, 12:01 PM
eruptive horse power
3 of 7 people found this review helpful.
Was this review helpful?
YesNo
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
Gains are impressive
Reviewed by freeman(Oakbrook Terrace, Illinois, USA), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Mercruiser 5.7L 350 MAG MPI – Monday, 6:36 AM
I'm pretty amazed by the professionalism of these guys. Although web site didnât promise help of any kind for your technical issue youâd come across they still were eager to guide me through the can of worms as Iâm not tuning savvy at all. Gains are impressive both mileage and performance wise. A lil hard to spot on the correct tap-in points and connectors provided in package should ensure more waterproofness with a lil extra labor your can cope with ironclad wiring with ease. Thank you gentlemen for drawing a nice grin to my face.
27 of 34 people found this review helpful.
Was this review helpful?
YesNo
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
I'll purchase again
Reviewed by Baal J.(Athens, Greece), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Mercruiser 502 EFI – Monday, 5:05 AM
Amazing products, I'll purchase again from Magnum
9 of 13 people found this review helpful.
Was this review helpful?
YesNo
(4/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
OK
Reviewed by Zhengsheng T., mining technology specialist(Singapore, Singapore), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Mercury 175 XRI EFI – Monday, 3:12 AM
Arrived in time, everything OK
4 of 11 people found this review helpful.
Was this review helpful?
YesNo
(5/5)
Ease of installation
Quality
Price to value ratio
Shipping & Wrapping
Customer & Tech Support
net gains
Reviewed by kerry(William P. Hobby Airport, Texas, USA), reviewed for Smart-Tune-X Boat Fuel Tuner Performance Module for Evinrude E175 E-TEC – Monday, 11:37 PM
I have thus far left my outboard in a stock configuration and have let all restrictive elements stay fitted but surfing thro google I deduced you can see horses beyond factory settings and entered smart tuner. This being said, resulted in net gains that are really noticeable underway and engine runs freely even its sound resemble a larger motor and reacts to the throttle aggressively. Installation was a bit challenging especially the mounting as there are neither holes nor screws that would allow you to fix the controller to any fixture. Finally I decided to leave in under the cowling as it turned out its sufficient to just adjust the tuner once. Overall disregarding minor infirmities, Iâm a very satisfied customer and my assessment for the customer service is 5 star.
20 of 23 people found this review helpful.
Was this review helpful?
YesNo
At first, it is difficult to believe that an aftermarket part can improve your ride, whilst manufacturers obviously employ the extremely proficient engineers and consult with experts renowned for their top of the top knowledge, but all doubts disappear just after the first test ride with new magnum Fuel Tune ECU Chip equipment. It is also important to pick a proper Fuel Tune ECU Chip to your Mercury 50 ELHPT 4 as each of them offers different features. For some people, a couple of options is enough, while others prefer to control all the systems of the Boat. This magnum mod is the best device for your Boat. Mercury 50 ELHPT 4 Fuel Tune ECU Chips won't be a problem as well. Install your Fuel Tune ECU Chip, results will show are stunning. Go through our Fuel Tune ECU Chip reviews with an average rating of 4.5 out of 5 stars to find a product that fits your 50 ELHPT 4 application.
Mercury 50 ELHPT 4
The installation of a new 50 ELHPT 4 Smart-Tune Boat Fuel Tuner is easy to do and will give you the opportunity to play on those benefits provided by this Mercury Fuel programmer. This is one of the best ways to upgrade your Inboard/Outboard and the results will fascinate you as soon as your Fuel Tuner installed. Place an order from Magnum Factory Outlet with confidence today. Your 50 ELHPT 4 upgrade will come with Magnum factory warranty. With a newly upgraded Mercury, your Inboard/Outboard will be much more receptive to all the minute inputs your right foot sends to the motor. Improve engine performance and torque but do not forget, hole shot also will be enhanced right away. Most people are intimidated when it comes to tampering with any part of a stock Mercury, but definitely this is a safe an simple upgrade that has been proven and perfected to yield results. 50 ELHPT 4 Fuel Tuner simply installs to the Inboard/Outboard part and modifies the Mass Air Flow Sensor Temp signal. This evaluation was left by Sargent, Hello, honestly the best jerry Fast shipment, affordable, price and quite easy to fit. Very respectful service. Thank you!!! Sargent