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E-TEC 50-hp

Brief Summary

Evinrude's E-TEC 50-hp is one of the smaller of the line of workhorses. The engineering has enables Evinrude to make some profound claims regarding lack of required maintenance and a substantial reduction in moving parts which translates into longer life. today, we take a look at some of the key features of this little engine, and put it through a full test and performance review. Your choices with the 50… pull cord or electric start, tiller or remote, blue or white.

Key Features


Type of Engine 2-Stroke
Number of Cylinders 2
Horse Power 50
Configuration In-line
Weight 240.00lbs
Fuel Type Gasoline
Fuel Delivery Fuel Injected
Shaft Length Options 20 in
Shift Throttle Control
Steering Control
Recommended Fuel 87 Octane
Alternator Output
CARB Rating 3-Star
Engine Monitoring System

Captain's Report

Evinrude E-TEC 50-hpThe E-TEC 50-hp is a 2-cylinder, two-stroke engine that our tests have shows burns cleaner, and requires less maintenance than a four-stroke. At 250 lbs (113 kg) it's also light.
In This Corner…
Weighing in at 250 lbs (113 kg) and hailing from Waukegan, IL is the Evinrude E-TEC 50-hp. It's had an outstanding season putting all of its 52.7ccs to work plying the waters of the world. It's not an engine that you'll put on a fiberglass bowrider, but as for an aluminum fishing boat, it's downright ideal. That's why when it came time to test the E-TEC 50-hp we sought out its ideal match, a 16'4" (4.98 m) aluminum fishing boat.
Evinrude E-TEC 50-hp
Our test boat had an empty weight of 895 lbs (406 kg), and with our 50 E-TEC, 10 gallons (37.8 L) of gas, two people and test gear we had a test weight of 1580 lbs (716.7 kg).
We reached a top speed at 5600 rpm of 29.6 mph. At that speed we were burning 4.7 gph and getting 6.36 mpg for a range of 114 miles.
Best cruise came in at 4000 rpm and 19.2 mph where we were burning only 2.1 gph. That translated into a whopping 9.16 mpg for a range of 165 miles. Time to plane was 3 secs and we reached 20 mph in 6.4 secs.
Aside from the great performance and economy, there are really a lot of impressive features about this E-TEC 50-hp. Let's take a look at some of the standouts.
The two E-TEC injectors work very much like the speaker coils in your home stereo. A wire coil goes around a magnet stack in the injector housing. Evinrude is able to define the amount of current going through the coil and cause it to oscillate and move the coil to pump fuel. An interesting feature of these injectors is that at idle they actually inject about 5 cubic millimeters per shot, which is about the size of a champagne bubble. That is partly how these engines are so fuel efficient.
At shutdown, there's fuel stored between the nozzle and a check valve, and that fuel will allow you to do a one-pull start next time you go to run your engine.
Evinrude E-TEC 50-hp
Oil Tank
The oil tank is set up so that you will be able to run a minimum of 30 hrs on the standard oil. If you switch to the premium oil, you can easily double that. Evinrude wanted to have the capacity to carry the engine through an average season for the average operator without having to refill. Clearly, your results may vary.
Evinrude E-TEC 50-hp
Vapor Separator
The vapor separator pressurizes the fuel system and sends 30 to the fuel injectors. In this manner Evinrude is able to eliminate the fuel pump. The vapor separators on all E-TEC's are water cooled.
Evinrude E-TEC 50-hp
The mechanical linkage is a common architecture throughout the E-TEC range. It's easily replaceable with an electro mechanical actuator should you decide to equip your boat with digital engine controls, and it's extremely easy to swap out to a tiller control. If you purchase a tiller kit, you plug into the same connectors in the control box, you use the same links to connect to the mechanics. The neutral lockout is actually on the power head making a tiller conversion even easier than you would normally find. The tiller, is in effect, plug and play. Remove two bolts from the front and you run the cables through. Longer cables allow you to control remotely from the helm.
Evinrude E-TEC 50-hp
Shaft Length
Part of what confuses people with small, or large for that matter, outboards is how to determine what shaft length you need. Our 50 E-TEC was a 20", and that measurement is taken as a length from the top of the transom to the top of the anti-ventilation plate. Now you can start to see the logic of why builders will notch a lower portion of their transom to accommodate an engine.
Evinrude E-TEC 50-hp
Lower Unit
Taking a look at the lower unit shows a clear view of the sacrificial zinc designed to deteriorate before the other metal components of the engine. It is easily replaceable, and should be if you see that yours is eaten away, or missing. Behind the zinc are the six holes that make up the water dump. This is the cooling water for the engine’s water cooled components. The intakes are just below. At the bottom is the skeg that is designed to provide directional stabilization as well as protection for the prop.
Evinrude E-TEC 50-hp
The EMM or Engine Management Module is basically the brain of the engine. It's divided into two halves, with the voltage regulation and battery charging done in the bottom half, the remainder of the engine control at the top half. The high-current drive circuitry is in the water-cooled passage in between. And yes, I did say "water-cooled:" Just as your computer needs to be cooled with a fan, this computer circuitry is cooled by flowing water through and acting as a heat exchanger.
Evinrude E-TEC 50-hp
Starter Motor
The starter is connected to the flywheel and activated by a high power solenoid. In this manner, the starter engages with a "bang" rather than a casual "clunk." This will ensure that you have positive starts, no problems with a sticking starter, and mainly it's the reason that Evinrude's starters are good for so many thousands of starts.
Evinrude E-TEC 50-hp
Whether buying a new boat, or re-powering an old one, you owe it to yourself to explore the advantages of bolting an Evinrude E-TEC onto the transom.