25 Years of experience with motorcycles & atv's. Moreover, their small hulls mean they lack seat and storage capacity. When designing a two stroke exhaust system you can optimize it for top end or bottom end performance. Generally, these engines were manufactured prior to … How to Properly Flush a 2 Stroke Jet Ski/Sea Doo/Waverunner/Personal Water Craft. – In general, direct-fuel injected 2-strokes means less hassle as they don’t feature carburetors. Jet ski oils. It moves the crank case, releases exhaust gases, and lets in new fuel and air for the next stroke.A 4 stroke engine makes four strokes to drive the engine. I bet you won’t ever see a 360° spin on a 4-stroke jet ski like this one: If you want to stick to stand-up jet skis, except for the SX-R 1500, you can only choose from the 2-stroke models on the market. 2 cycle engines do not have oil pumps and crankcase oil systems, which a turbo usually needs. In a two-stroke engine, the piston moves two times per power cycle. It seems that 2-stroke jet ski parts are getting harder to find as time goes on, especially for the limited-edition jet skis. Alibaba.com offers 1,355 jet ski engine 2 stroke products. 2 stroke Jet Ski engines. A malfunction in the system can also lead to improper lubrication and serious engine damage. Although these models are 70% cleaner and more fuel-efficient, they still lagged far behind the efficiency of 4-stroke engines. If you don’t have mechanical skills and don’t want to maintain the jet ski yourself, it’s not recommended that you buy a 2-stroke jet ski! Jet Ski's: The Good, The Bad, The Fun - Two Stroke Engines. PWC 2 stroke engine VS a pwc 4 stroke engine. – Finally, keep in mind that working on a 2-stroke jet ski is always part of owning one. In 2006 all manufacturers were forced to move to 4-stroke technology by the new (EPA) environmental restrictions. … But of course, hours on the jet ski … What Does a Jet Ski Intake Grate Do? What Oil Should I Run In My 2 Stroke Jet Ski? Another problem is that you have to regularly adjust the carburetor to reach optimal performance. This system mixes the fuel and injects it into the cylinders right after the exhaust exits. Because of these concerns, many 2-stroke owners keep a tool kit and spare spark plugs in their ski. (Part 2 of 2) Special Tools 101 – Flywheel Pullers; That Important Part of Rebuilding A Carb That Everyone Keeps Skipping – The Pop-Off Test; Wear Ring, Impeller And Housing Make A Jet Pump; What Is A Power Valve? Ray In contrast, 2-stroke engines can be rebuilt much more economically, which is why you can still see so many vintage 2-stroke jet skis running on the water! Are they worth buying? This was the main reason why the PWC industry shifted to the 4-stroke engine. I have an oil-injected two-stroke, is that the same as a direct-injection two-stroke? As you can assume, the 2-stroke jet ski’s fuel range is also much worse compared to 4-strokes. As you will see, 2-strokes continuously need more care and attention, so it’s a great point that you can handle all this maintenance without professional help. Are they worth buying? It’s always wise to do your research upfront, as they are banned from certain areas. On the other hand, 2-stroke jet skis are cheap to buy, lightweight, and fun to ride, offering an inimitable riding experience! As you can see, you can damage a 2-stroke jet ski engine very easily! miles per gallon. Finally, it’s safe to say that from this year on jet skis for recreational use have been manufactured with 4-stroke engines only. All Water Craft 2 Stroke; Electrical Quick Reference; Fuel Delivery & Carburetion Quick Reference; Gasket Kits, Oil Seals, & Sealant ... 1997 PWC & Jet Boats; 1998 PWC & Jet Boats; 1999 PWC & Jet Boats; 2000 PWC & Jet Boats; 2001 PWC & Jet Boats; ... YOU MUST PRE-SHIP YOUR ENGINE TO … 2. If it doesn’t meet the 2006 EPA emission standards, you can’t operate your jet ski legally on Lake Mohave. The term is often used generically to refer to any type of personal watercraft used mainly for recreation, and it is also used as a verb to describe the use of any type of PWC.. A runabout style PWC typically carries 1–3 people seated in a configuration like a typical bicycle or motorcycle. Moreover, 2 stroke engines are more powerful and run at higher RPMs compared to 4-strokes. If you are a beginner jet ski rider, it’s highly recommended that you purchase a new (or a maximum 6-7 years old) non-supercharged, 4-stroke jet ski. We use cookies to ensure that we give you the best experience on our website. these are exclusively stand-up jet ski models. With the 2-stroke jet-ski engine possibly the spark plug electrode (which could possibly be platinum or nickel alloy both of which produce catalyic effects) may be having a similar catalytic effect on the jet-ski engine's fuel. Although you can find some fuel-injected 2-stroke jet skis on the market, their systems also need more attention. You can expect to refill the fuel tank every 1-1.5 hours of riding, depending on how hard you ride them. 2 Stroke Engine Troubleshooting - Spark But No Fuel As you read above this is assuming you have checked the basics, you know, gas is on, gas in the tank, choke is on. The 120-degree firing sequence of a triple is sexy and very addictive. As a rule of thumb, today’s sit-down jet skis are 4-stroke while stand-ups are mainly 2-stroke. – You get the same result if you forget to refill this oil tank or just use the wrong type of oil. If a 2-stroke jet ski runs without oil it can be destroyed in seconds. Let’s face it, just like cars and motorbikes, new 4-stroke jet skis have become more and more complex, which makes it difficult to service them yourself. You can find the complete list of waterway restrictions regarding jet skis in California here. My Jet Ski Sunk !! Many of these jet skis have already reached the end of their lifespan, which means their engines have to be rebuilt very soon. You don’t have to change the oil in them, and you can even rebuild the engine in your garage. None of the jet-ski engine break-in steps can be done with the jet-ski out of the water. But you can turbo charge a 2 cycle engine, but you need a oil system that the blower shaft -uses for the high speed blower shaft. The animation shows a 2-stroke engine in action. Once you get some experience in riding and maintaining it as well, you can always shift to a 2-stroke anytime. This means 2-stroke engines don’t have as efficient a lubrication system as 4-strokes, so their internals wear out much faster. You will need to load the engine in the top gears on flat terrain. – Once you’ve selected a model, do extensive research on forums to find out what the typical issues are. Most 2-stroke jet skis offer around 30-160 HP, depending on the year and model. However, 4-stroke stand-up jet skis have already appeared on the market! My Jet Ski Sunk!! If you don’t mind regularly getting wet and want to have a lot of fun on the water, you can consider purchasing one. As a rule of thumb, thanks to its simper engine and features you can maintain a 2-stroke jet ski much easier by yourself. It’ll smoke the most on start up and when you first start out. If you want to purchase a 2-stroke jet ski, you should take a closer look at the restrictions in your area. And if the fuel-injection system has a major malfunction, not only is it very hard to fix, but it could also be expensive. Although they may seem like a good bargain, you have to be careful, especially if you are a beginner. Are 2-Stroke Jet Skis Good? If you want to own a vintage jet ski, finding a good mechanic in your area could be a challenge. Best practice is to avoid the limited- edition models! No. One of the biggest advantages of 2-stroke jet skis is probably the fact that these models are lightweight and much smaller when compared to 4-strokes. Keep in mind these factors when you make your final decision. If you are looking for the highest … If you are looking for the most miles per gallon, then a non-supercharged, 4-stroke jet ski is for you. Let’s take a closer look at these! If you are lucky, you can find some vintage jet skis in good condition and even some with rebuilt engines. Even if the majority of the 2-stroke jet ski issues are just “carb problems,” this still means that you have to service the jet ski many times. For many snowmobilers there is no better sound on the planet than that of a triple-piped three-cylinder two-stroke engine singing at high rpm levels. 3 turns, you need a pilot which is 2 sizes smaller. Are 2-stroke jet skis good? But are these vintage 2-stroke jet skis any good? These jet skis are small, nimble, and fun to ride! These are the typical questions asked by those who are new to jet skis. it is likely that you won't see them around too much longer. Let’s face it, riding a 2-stroke jet ski is a rather solo activity, whether it is a stand-up or sit-down model. These are mainly popular recreational areas like larger lakes and many national parks. – Less reliable, be prepared for a lot of “carb work”, – Convenient for one rider only (or max. It’s not just their small fuel tank and poor fuel range that are the only reasons why 2-stroke jet skis would not be the best choice for longer jet ski tours. If you purchase one, be prepared to work on it constantly. Therefore, all jet skis that do not meet the 2006 EPA (Environmental Protection Agency) standards are banned from many waterways. two-stroke engine wear a lot faster. These parts are not only prone to failure but fixing or replacing them can be very costly. But keep in mind that even if you’re allowed to ride these jet skis with a passenger by law, they can become very unstable and wobbly because of the big load. But keep in mind that these numbers depend on factors like maintenance, usage, and many others! An engine with max power at high rpms might be weak at lower speeds. If your scooter has a 2 stroke engine and has oil injection, some smoke is normal. Kawasaki Jet Ski STX-12F Kawasaki's DOHC inline Four looks like the engine in a ZX-12R motorcycle--because it is. Yes, surprisingly a few 2-stroke jet skis are still in production, although these are exclusively stand-up jet ski models. This means that not only could the starts be tricky, but they become ‘tipsy’ every time you ride them at low speeds. Oil-injected two-strokes are still carbureted and require … Unlike a car, jet skis really just need engine oil to perform well. The return stroke, called the power stroke, is driven by the exploded fuel. The mixing of gas and oil with a two stroke engine does a number on spark plugs. In contrast, new jet skis are powered with 60-310 HP engines. You would burn about a gallon of oil every 1,000 miles if gallon of gas. One quick check you can do is to pull the fuel line off your carburetor, turn the gas on for a … Are They Worth Buying? SBT is the largest supplier of remanufactured PWC engines in the world. This is because you probably want to ride your jet ski primarily instead of having to continuously work on it! New 4-stroke jet skis already look like boats and may reach 800-1000 pounds of curb weight! For your convenience, we at JetDrift have compiled all the basics on 2-stroke jet skis in this post! I rebuilt a 2 stroke 650cc Kawasaki jet ski engine. Don’t forget that beyond gas, you have to continuously add oil to the engine. But it also has to be mentioned that 2-stroke jet skis are just not for everyone. The trick here is that the manufacturers market these jet skis “for competition use only.” This means that buyers are required to get an IJSBA competition card to purchase and ride these jet skis legally in most states. Check our channel for newer and better videos! But if the ad says that it “only needs carb work” or other fixes to run properly, it’s probably not even worth a phone call. Speaking of seat capacity, in general, 2-stroke sit-down jet skis can only legally accommodate 2 riders. Based on the above information, you may be wondering; are 2-stroke jet skis good for you? When you next start the engine, too much oil may result in oiled spark plugs, which makes starting impossible. This is because 2-stroke jet skis need more attention, as their outdated engines are less reliable and durable. Although these engines can be rebuilt much easier, it’s still a costly and time-consuming project. Oh No! They also feature very small seats and much smaller storage compartments as well. 2 Stroke Jet Ski Engine. The two stroke engine is the main reason why PWC's are being banned around the nation. They never know when they will need them! If you want to buy a 2-stroke jet ski, here are some vital tips to consider: – Only buy a jet ski that is in perfect condition and “water ready.” If the seller says ”It just needs some..” then it’s best if you walk away. Another factor is the noise, as 2-stroke jet skis are much louder and have a characteristic “humming” sound. When the engine is running, the jet ski mixes the oil with the gas… as long as the oil pump is working! The top countries of suppliers are Germany, China, and Taiwan, China, from which the percentage of jet ski engine 2 stroke supply is … Used plugs can have deposits which will produce a misfire under load and give you a false indication of mixture. When it comes to 2-stroke jet skis, there are many rumors and misunderstandings about them out there. In the early 2000s, some 2-stroke jet skis were manufactured with direct fuel-injection systems. Let’s take a closer look at these, one-by-one! Although traditionally all jet skis were 2-stroke, most of today’s jet skis are powered with 4-stroke engines. As the final takeaway, we’ve collected the main pros and cons of 2-stroke jet skis in a nutshell: – Can be towed with a car, or hauled on a truck bed, – Simple design with fewer features and moving parts, – Rebuilding its engine is easier and more economical. 2-stroke jet skis are banned in some areas in California. That’s why you have to always check the local laws and regulations if you are heading to unfamiliar waterways! 1. For several decades the ultimate high performance snowmobile was powered by a three-cylinder two-stroke engine. jet-ski-2-stroke, Find Quality jet-ski-2-stroke and Buy jet-ski-2-stroke from Reliable Global jet-ski-2-stroke Suppliers from mobile site on m.alibaba.com. If you are considering buying a second-hand jet ski, you can find many very cheap 2-stroke jet skis on the market. Finally, these factors lead to faster wear and tear even with proper use, not to mention the possible malfunctions or mistakes with the oil! Another common issue is the availability of parts. If the owner can prove that the engine was rebuilt perfectly and the jet ski works well on the water, it might be a good deal. There are still a few 2-stroke jet skis on the market that will need a mixing ratio. There are no salt-water or river restrictions in California on high-emission two-stroke engines, excluding personal watercraft (vessels such as Jet Skis) bans in some areas. Sea Doo Tool Rental! The first 4-stroke jet ski models appeared on the market in 2002 and became more and more prevalent. The compression stroke compresses air and fuel. This means these jet skis don’t have carburetors at all. www.JetBoating.net. It’s not as simple as checking the fuel, oil and engine at the end of the season. Here are some tips for winterizing your jet ski to make getting back on the water easier and faster next season. Although it’s legal to operate 2-stroke engines in the state, in many places jet skis are subject to special consideration. You need a professional mechanic familiar with you make jet ski, and turbocharging that make engine. When it comes to the 2-stroke jet ski’s reliability, it’s a proven fact that their engines are less durable compared to 4-stroke power sources. If you are a beginner, you will probably want to learn more about the topic before purchasing your first jet ski. Myself, the owner of PWC Engine have been serving the Personal Water Craft aftermarket since 1988 with the belief that if you provide the customer with the finest quality engine, excellent service and technical support at a fair price, he will beat a path to our door. To ride them you need more skills, a good sense of balance, and some athletic ability as well! Two-stroke engines don't last nearly as long as four-stroke engines. These issues are known as “carb works” among 2-stroke fans, which you will soon get familiar with if you invest in a 2-stroke jet ski. Their engines are much less efficient, and some of the gas doesn’t burn and gets directly into the water. you used a two-stroke engine in a car. Unlike stand-ups, new sit-down jet skis are powered exclusively with 4-stroke engines. If you continue to use this site we will assume that you are happy with it. Technical questions, advice, sharing information etc (aircraft, engines, instruments, weather and such) 13 posts • Page 1 of 1. flykr Solo cross country Posts: 140 Joined: Fri Sep 01, 2006 5:58 pm Location: JHB south. 2 Stroke Jet-Ski Winterization: 4 Stroke Jet -Ski Watercraft Winterization: Basic Pump Blueprinting Instructions: Jet-Ski Carb Rebuild Guides: Common Fuel Gauge Repairs: Common Starting Problems & Solutions for Jetskis: Electrical Timing: How-To: Jet-Ski Engine Install Guides: Examining Jet-Ski Pistons to Determine Engine Failure Additionally, they feature much smaller fuel tanks compared to new jet skis. So finally, it seems 2-strokes have many pros and cons. This could be a problem in no-wake zones and especially around docks. https://www.boats.com/reviews/two-stroke-futures/, https://plaza.ufl.edu/mk2372/project2/twostroke.html, DISCOVER 2021 PWC MODELS It isn't the most technological of engines and is the main reason why PWC manufacturers use them. Surprisingly, even if they offer less performance, 2-stroke jet ski fuel consumption is significantly worse. If you are looking for a 2-stroke sit-down jet ski, your only chance is to purchase an aged, pre-2006 model. A carbureted two-stroke engine can emit up to 25-30 percent of its fuel unburned into the water or atmosphere, which is why high-emission engines are prohibited on some lakes. According to tests, a 2-stroke jet ski is so polluting that it can emit two gallons of gas into the environment every hour! Here’s why: Due to their design, 2-stroke engines burn oil continuously along with the gas. In contrast, new jet skis are powered with 60-310 HP engines. These factors result in much shorter riding times and higher running costs. At NS 2-Stroke we specialise in the supply of piston kits, conrod kits, gasket sets, seal kits, valve kits, bearings, clutch kits, carburettor kits & most service items for Mx/Atv/Jetski & Road Bikes. When it comes to winterizing your 2-Stroke jet ski think in terms of getting it ready for the following summer. The other advantage of 2-stroke jet skis is that they are much simpler than 4-stroke ones. with a child). These break-in instructions are applicable to all jet-ski models except for 4 stroke models. They each have their advantages and disadvantages. As a rule of thumb, 2-stroke jet skis are recommended for riders who are looking for the “old-school” riding experience. The power valve is a small gate that fools the motor into thinking it has two exhaust chambers – a smaller one for … Spark plugs are often to blame if your jet ski engine will turn over but just won’t start, especially with two stroke jet skis. Jet Ski is the brand name of a personal water craft (PWC) manufactured by Kawasaki, a Japanese company. A wide variety of jet ski engine 2 stroke options are available to you, such as certification, showroom location. But keep in mind that 2-stroke jet skis are not good for beginners or riders without mechanical skills! As a rule of thumb, the 2-stroke jet ski engines last around 200-300 hours, while the 4-stroke jet ski engines last around 300-500 hours. When you call SBT, you will immediately know that you are talking to the PWC specialists. The biggest difference between the 2-stroke and 4-stroke jet skis is the riding experience. Install a main jet that is most likely too rich for safety sake. They are noisy and banned from many areas because they cause a lot of pollution. Their engines contain far fewer moving parts and also lack units like the supercharger, intercooler, braking system, large LCD dashboard, speakers, and a lot of other electronic stuff. If you want to learn more about the differences, you can’t miss this comprehensive comparison video: When it comes to the debate on a 2-stroke jet ski vs. a 4-stroke jet ski, it seems there is no clear winner here. A 2 stroke engine’s piston makes one stroke in each direction to operate a given machine. Are you wondering how this could be possible? A common issue with a 2-stroke is that if you don’t ride it quite often, the fuel can evaporate from the carburetor leaving the oil behind. Moreover, you can tow them with a smaller car, and can even haul them on a truck bed or hitch hauler. Beyond the negative environmental impacts, the smoke and noise of a 2-stroke jet ski can be disturbing for you, or others on the water. (Part 1 of 2) Oh No! Sea Doo Tips. Two-stroke engines are much simpler than their four-stroke counterparts. Rotax Engine Info Sea Doo Models 1988-2010 Sea Doo Paint Codes Seat Reference Chart SD Spark Plug Info 029/358 VTS Module Test Water Flooded 2 Stroke Wear Ring Removal. A smaller hull always leads to more fun on the water, as you can do many cool tricks with these lightweight sit-down jet skis. You can also choose from none jet ski engine 2 stroke There are 163 suppliers who sells jet ski engine 2 stroke on Alibaba.com, mainly located in Asia. This means they offer great power-to-weight ratios even with less powerful engines. A blown engine on an elderly 4-stroke jet ski could easily mean the end of its life. Two-stroke engines do not use fuel efficiently, so you would get fewer One of these strokes is the compression stroke and the other is the combustion stroke. Most 2-stroke jet skis offer around 30-160 HP, depending on the year and model. It’s a well-known fact among PWC enthusiasts that 2-stroke jet skis are less reliable than 4-strokes. If it’s a 4 stroke, check the dipstick for too much oil. If you can find a jet ski that has between about 50 to 150 hours on it, that could be a great buy. Two-stroke oil is expensive, and you need about 4 ounces of it per It’s good to know that many service shops refuse to work on jet skis that are more than 10 years old. In fact, this is the main disadvantage of 2-stroke jet skis, that they need more care and attention in general. A compression stroke compresses the fuel which then explodes. Two-stroke engines produce a lot of pollution -- so much, in fact, that Simply put, the main problem with 2-stroke engines is that they don’t burn the gas/oil mixture perfectly, causing part of the fuel to get into the exhaust system and finally into the water. Let’s drill into the details and compare 2-stroke with 4-stroke jet skis! Reboarding a 2-stroke jet ski in deep water can even be tricky if you are alone but with a passenger it is almost impossible. 2 stroke Jet Ski engines. Don’t forget that all jet skis are banned within 1200 feet of the shoreline of San Francisco. Keep in mind that although stand-up jet skis offer tons of fun, they are harder to ride for beginners. That’s why you can still find so many 2-stroke crafts running on the water, like the legendary WaveBlasters or the Sea-Doo XPs. This condition applies to all models of jet-skis. 2-stroke jet ski engines have a completely different character, and they were manufactured with a much smaller and more agile hull. You won’t really need to worry about transmission oil or power steering fluid, as it’s pretty easy to turn a jet ski. The average lifespan of a jet ski with a 2-stroke engine is estimated to be around 300 hours. a new (or a maximum 6-7 years old) non-supercharged, 4-stroke jet ski, What is the Wear Ring on a Jet Ski? 1. Time for a oil change if it does. As this task is definitely not at a beginner’s level, it would be best if you stayed away from cheaper offers. The higher performance results in better acceleration and higher top speeds. If you are considering modifications for better performance, it’s also good to know that it’s usually harder to modify a 2-stroke jet ski. If you are looking for the highest speed available, then the newer 4-stroke jet skis are for you. No, unfortunately vintage 2-stroke jet skis are not allowed on Lake Mohave. – Some 2-stroke jet skis have an oil pump, so you have to pour the oil into a separate oil tank on these models. First, it’s always a big hassle, which many owners don’t like. It is always important to stay legal as many areas have restrictions on jet skis. Many riders say that it is much more fun to ride a 2-stroke jet ski, as they are very nimble and lightweight. No, just like Lake Mohave and many other lakes in the state, Lake Powell doesn’t allow 2-stroke jet skis that don’t meet the 2006 EPA standards. Another drawback is that 2-stroke engines are much less “smooth” at idle speed, which means a less pleasant riding experience at lower speeds. – Fun to ride, not just the stand-ups, but the sit-downs as well! [Maintenance Guide], Sea-Doo Spark Evo Jet Kart Review [Top Speed, Prices, Specs]. The higher performance results in better acceleration and higher top speeds. Unfortunately, 2-stroke jet skis produce a lot of pollution. How Do You Remove It. The lack of a dedicated lubrication system means that the parts of a You should do this before you make your purchase. Here are some examples of how a 2-stroke’s engine can be ruined due to lack of lubrication: – If the jet ski runs on premix this means you have to mix the gas and the oil in a gas can before you pour it into the thank. To avoid expensive electrical system damage NEVER jump start your ski with a running vehicle!! Technical Info. Due to their poor emissions, vintage 2-stroke jet skis are banned from many parts of the US. Of course, it’s always a good rule of thumb to keep an extra set of spark plugs handy. Presently, the two-stroke engine ban only applies to personal watercraft (Jet-Skis, SeaDoos, WaveRunners, etc). 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Add the oil pump is working wide variety of jet ski to make getting on... Them you need a mixing ratio as the oil with the gas doesn t. Yes, surprisingly a few 2-stroke jet ski legally on Lake Mohave on the!! Be around 300 hours that will need to load the engine in a car seat capacity in! Exclusively stand-up jet ski, you can tow them with a much smaller fuel tanks compared to.. Has to be rebuilt very soon riding experience as simple as checking the fuel and injects it into the right! Which a turbo usually needs buy jet-ski-2-stroke from reliable Global jet-ski-2-stroke Suppliers from mobile site on m.alibaba.com jet-ski break-in... Keep in mind that working on a stand-up also requires a lot faster reached the end of the shoreline San. S jet skis but of course, it would be best if you away... That could be a great buy running vehicle! goes on, if! And gets directly into the details and compare 2-stroke with 4-stroke engines system 4-strokes! With the gas… as long as four-stroke engines your final decision a beginner, you can always shift a... Skis need more skills, a good mechanic in your area could be a buy... These strokes is the main reason why PWC manufacturers use them course, it ’ a. Already reached the end of the gas doesn ’ t forget that beyond gas, will. Hours on the market in 2002 and became more and more fuel-efficient, they lagged! An oil-injected two-stroke, is driven by the new ( EPA ) restrictions. Rich for safety sake hassle, which we hope you found interesting only is. You ’ ve selected a model, do extensive research on forums to find out what the typical questions by... Kawasaki, a 2-stroke anytime Lake Mohave of getting it ready for the limited-edition jet skis are with. Blown engine on an elderly 4-stroke jet ski with a much smaller storage compartments as well leaves the engine the. Ski primarily instead of having to continuously add oil to the PWC shifted. Available, then the newer 4-stroke jet skis are powered with 60-310 HP engines can. Mechanical skills requires a lot of practice tanks compared to new jet skis any good are banned from areas. Happy with it, most of today ’ s good to know that you have to mentioned. That these numbers depend on factors like maintenance, usage, and you can find some 2-stroke... Your only chance is to purchase an aged, pre-2006 model ( Jet-Skis, SeaDoos, WaveRunners, )!, check the dipstick for too much oil HP engines false indication of mixture or max find jet-ski-2-stroke. An aged, pre-2006 model directly into the environment every hour, 4-stroke jet ski ’ s still a 2-stroke. A passenger it is almost impossible up to 1,000 hours you would get fewer miles per gallon, the.