They aren't making the 2 strokes anymore, and I can see how parts could become an issue. #13. They usually start easier and there is no need to worry about 2 stroke fuel mix issues. But only the first 3 years will be covered by Suzuki. When checking the oil its important to take notice of the oil level and to be sure that its not too high or too low as it can indicate a plethora of serious problems. Moody says that his Evinrude two-stroke outboard costs are at least 50% less to maintain that a four-stroke outboard of similar capacity. Additionally, four-stroke outboard motors put out few emissions and are amazingly fuel-efficient. Nowon to you! With outboard engines, the fundamental principle of the engine remains the same. Fresh fuel only. So depending what a mechanic prefers to work on will influence which was worse, ie, it's easier to clean a carb than an efi system so get a 2 stroke. Moody had his two-stroke engine tested and found that it generates up to 25% more torque than four-strokes of the same capacity. New comments cannot be posted and votes cannot be cast. They have incredible longevity, durability, economy, and safety (theyre less likely to catch abrupt fire because diesel has a higher flashpoint than gasoline. On the forum website, The Hull Truth one senior member of the forum replies with the following to the post, Life Expectancy of Outboard Motors. Skinny water in Matagorda Bay. That being said, there are still differences between the two. The main disadvantage of the two-stroke outboard motor is that it does not have the same longevity as a four-stroke. Price is probably the least significant number. The one thing that is responsible for many outboard engine failures is lack of use. When checking the oil there are several things that must be checked. Having said that, the later yamaha 2 strokes are considered to be some of the best outboard engines ever built. The main factors are weather to purchase: used outboard (two or four stroke) new 4 stroke outboard new direct fuel injected 2 stroke outboard In this test, the 4-stroke Yamaha and Honda outboards maintained the advantage in fuel efficiency, burning 22% less fuel at full throttle. By comparison, standard 2-strokes blow 1/3 of their oil directly into the air/water. As a result, the weight comparison of a 2-stroke vs. 4-stroke engine is now less of a concern. earlier this year i unbolted a yam F-100 4 stroke and replaced it with a merc 115 Opti. Posted November 22, 2013 Posted Posted Posted Well that's news to me. A 5 year old engine with 400-500 hours on it will probably be more reliable than a 5 year old engine with 20 hours.. He also tested the fuel efficiency by running his boat powered by a two-stroke engine alongside one with a four-stroke engine as a control. Two-strokes are said to be noisy, low performers at or near idle speeds and not very fuel efficient with high emissions. There not turning 10,000 rpms like a race bike engine,they lope along at 4-5 grand and are pretty much bullet proof. It may be warm, but it shouldnt be hot. This engine produces higher torque at low speed (rpm). Start the engine again and check the output. Todays new 4 and 2 strokes should get many, many hours of use before a major breakdown will happen. The downside is that it's just too large to put in the well, so it lives on a lifting bracket on the stern, but the good part of that is that it's much quieter out there. Each one of us at Outdoor Troop is an outdoor enthusiast in one area or another. Check the tank vent to make sure it aspirates properly. 4 strokes can be extraordinarily reliable but when you try and match the power output of a 2 stroke with a similar size/weight 4 stroke you have to work the engine very hard to get anywhere close (by definition 2 strokes are roughly To summarize, 2 stroke motors and 4 stroke motors each offer their own unique benefits as well as drawbacks. However, it is worthwhile to note that advanced technology has eliminated many of the disadvantages of four-stroke outboards. Older 2 strokes are all but indestructible. Additionally, two-stroke engines offer double the power for their size due to the fact that there are twice as many strokes for each revolution. Two-stroke engines are generally noisier than 4-strokes, but manufacturers have managed to bring down the noise levels in recent years. After done flushing the system and disconnecting the fuel line turn the motor off. 2 Stroke v 4 Stroke Outboard Engines. If you're concerned about pollution, 4 stroke engines are significantly more environmentally friendly than their 2-stroke . 3. Advanced Search Cancel Login / Join. Because the speed of four-stroke engines is lower than that of two-stroke engines, these outboards last longer than [two-stroke engines]., Once you get over 100hp, you dont see any outboards from the 70s and few from the 80s. But in 4 stroke engines, power is only generated in one of four total strokes. Simple, affordable maintenance is another factor that weighs in due this motors basic functionality. Boat Safe suggests the following. Or Redid the vinyl today for the boat name. Increased Torque That said, the 2-strokes kicked butt when it came to acceleration, with Evinrude leading the pack. 2 strokes are f. 4 stroke engines are less noisy and . 4 stroke outboard motors are rich with features and functionality intended to keep them running for longer periods of time. You just have to decide what works best for you. Remove the engine cowling. There are several ways that one can prolong the life of their motor. This is why having more 4-stroke motors is desirable from a water quality standpoint. barnaclebillsmarine. The website Boat Safe lists out what these signs mean and how to deal with them in their article, The Life Expectancy of the Marine Engine.. However, once running, both offer speed and power. When comparing these two types of engines, there are pros and cons to each. They are generally more expensive. Which is better 2 stroke or 4 stroke? The 4 stroke also has a lot more extra parts & complexity that adds to the weight of it. When the season ends and youre getting ready to winterize the boat and outboard, this should include draining the tanks of the fuel leftover. 2 Sticks vs 4 Sticks / T Topology vs Daisy chain is there 2 paddles vs 4 paddles and switching to PC? Smooth as warm honey. Replaced a 1972 evenrude with a 90 honda, wish I had not. Outboard motors are cooled by water, which means if this system gets messed up for whatever reason, the outboard is in high risk of overheating. According to Moody, he gets more power and torque from his two-stroke outboard as compared to a four-stroke engine of equivalent rating. So, hes not paying $4,000 a year to maintain his two-stroke outboard. Larger and heavier than its two-stroke counterpart, four-strokes are more expensive to build, although manufacturers are now building more space-efficient models. Check the filter for clogging. Return the engine cowling to its place and wipe it down. Anything you would like to add that you would consider an important factor for our readers looking to make a decision? When engines are allowed to set up unused for long periods without proper preparation, a surprising number of things can go wrong.. Make sure the water pump is functioning properly. A common belief is that a fourstroke outboard has more power than the two-stroke variety. At 4000rpm the difference was greater with the OptiMax using 31.2lt/h compared to only 21.3 for the FourStroke 150. On the forum, one member said the following. However, 4 stroke outboard functionality is known to be more reliable overall. I prefer a 4 stroke, it's quieter, gets better fuel economy, and engines are easier to find in better shape (where I'm at). Two-stroke motors require a mixture of oil and gas to lubricate all of the moving parts, which can be expensive and somewhat difficult to formulate. No matter what you do, purchase your new outboard from a reputable source such as L & M Marine, which features a wide variety of both two- and four-stroke outboard options. They will usually outlast the hull if maintained & run properly.. Old 2 strokes if properly maintained will be fine. On the other hand, Yamaha only offers 3 Years of warranty for 4 stroke outboards. As the piston turns, the fuel and air are compressed and then ignited in . Thats why outboards last so much longer if they are taken care of and maintained. At the very least, the oil should be checked at least once a day before heading out on the water. All told, the used oil that is burned is combusted very cleanly and recaptures a useful energy source. There are some very reputable brands of motors, but each has its benefits and drawbacks. Moody gives an example as follows: If he ran a four-stroke engine, servicing it every 100 hours, he would service it five times a year. The propeller could be bent or damaged. 12 Small Fishing Boat Accessories to Buy Today. This process is a repetitive action, and as the crankshaft is attached to the other moving parts of the engine, it causes them to move. Check out the Westshore Marine & Leisure Youtube page! 4-stroke is smoother and quieter. Both technologies are solid and highly evolved. The 2-stroke are much easier for a DIY mechanic to work on and parts tend to be much cheaper (plus less parts overall). If they are both 250s and ridden the same, I'd say the 2stroke because it will put out twice the power of the 4 stroke, the 2 stroke will live a easy life when compared to the 4 stroke. Due to advancing technology and on going research the majority of consumers have several options when finding the right outboard for their requirements. At 1000 hours it will start to exhibit the small problems that often start occurring from old age. Another way to look at it is that Big Lake could accommodate more 4-stroke motors and still meet water quality criteria than if there were as many carbureted 2-strokes on the lake. Where can you ride your new ATV in this part of After reading our last post on kayak fishing, you were inspired to give it a try. Many people were pretty split. A 2 stroke outboard motor has a faster pick-up speed than a 4 stroke. He has a two-stroke engine which needs a spark plug change and gear oil change every 300 hours. Re: 2 stroke vs 4 stroke pro's and con's ? Make sure the fuel-line fittings seat properly and dont leak. Yamaha 100 4S (this engine is now rated at 90HP): Pretty heavy at over 350lb. Most four-stroke outboard motors on the market today feature high-tech computer management systems to keep the motor running smoothly, which grants them great performance. Again on The Hull Truth, a senior member states the following about outboard longevity. The main difference between 2 stroke and 4 stroke engines is the way they operate i.e., the movement of the crankshaft and piston is the major difference between these two engines. I recall somewhere also if you have a 4-stroke spark plug where the side electrode extends past the . A dipstick attached to the oil tank cap allows for easy checking of the oil level. Some people love the quiet efficiency of a 4 stroke, and the fact you don't have to mix oil in the gas. If maintenance is kept up with the boat is it less likely to have major problems later. Here we will go over what some people are saying about these factors, but personal research will have to be done so you can find the outboard motor for you. Also those old carburetors need to be "floored" to clear them out. Both should get the same amount of hours on them. Well, thats a wrap! Others prefer 2 stroke engines when the . A four stroke usually has greater longevity and uses a little less fuel. Photographer on the dock got us coming in last night. A two-stroke outboard requires only two piston movements to complete a cycle. Then the Suzuki dealership will cover the 4th & 5th years. However, depending on how the fuel burns, we classify the engine as a two-stroke outboard or four-stroke outboard. There are four stages to the functioning of an internal combustion engine suction, compression, expansion, and exhaust. November 29, 2017 at 2:45 pm #68065. While in the process of flushing out the motor be sure to check that the water pump has a good steady water flow. 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