For a compression test, the engine itself provides the pressurization. At the same time, you don’t need to go out spending money on services that you don’t really need. )eval(ez_write_tag([[250,250],'bornagainboating_com-box-4','ezslot_6',108,'0','0']));eval(ez_write_tag([[250,250],'bornagainboating_com-box-4','ezslot_7',108,'0','1'])); This will allow you to turn the engine over to get the results from the compression test. Add to Cart Add to My List. Now you can jump the solenoid using your button and turn the engine over while looking at the gauge.eval(ez_write_tag([[336,280],'bornagainboating_com-banner-1','ezslot_1',109,'0','0'])); Continue turning the engine over until the compression gauge levels off up at the top. Boat Reviews. A screw-in compression tester has a hose connected to it and a fitting on the end. Compare to. (Check this out for more information on The Different Sections of an Outboard Engine!). Cylinder Leak-Down Tester $ 24 97. Which isn’t really the case. Keeping this in consideration, how much compression should a 4 stroke outboard have? Whether or not the engine is creating the proper amount of compression to run properly. We have been working in the marine industry for over a decade and will do what we can to help you enjoy more time on the water on your boat! AZUNO Compression Tester Automotive, Digital Compression Gauge 200 PSI for Petrol Engine Small … Driving the pistons of other cylinders up and then doing this in a specific sequence to keep all of the pistons going up and down and creating the power of the engine. 130, 130, 120 are good numbers just check it every year when your annual service is done to make sure the gap doesn't widen. This, by the way, is not the right way to buy a used boat (or new for that matter). Performing the compression test is actually a pretty simple process. You are going to want to take off any of those covers that we talked about earlier from over the top of the ignition coils. I have owned several Johnson / Evinrude outboard motors, a couple of Mercury’s, and at the time of this post one Yamaha four stroke. The top is the top and the last 5 pounds or so isn’t going to matter! Will change the results of your compression test. Check Latest Price. Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. There is just a lot of things that can cause this. Now the Four-Strokes have more moving parts. The results are going to have the same ranges, regardless of what brand engine you are doing the test on. This is another one of those “controversial” subjects. Now it is important to note here that you might see 150 or 160 PSI on certain engines when doing this test.eval(ez_write_tag([[250,250],'bornagainboating_com-narrow-sky-2','ezslot_21',111,'0','0'])); Simply open up the throttle plates by pressing the throttle handles on the control box to wide-open throttle in neutral. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to We are compensated for referring traffic and business to Amazon and other companies linked to on this site. So, if you do the test while the engine is hot. On a Four-Stroke, the same applies, but there is also the issue of the engine having an issue with the valve seats. These tests are used to measure the pressure that is created associated with the motions of the piston in the cylinder, provided in PSI (pounds per square inch). A compression test is still the best test for a 2-Stroke engine and should be performed before any repair service is done on a 2 stroke engine. You will need to be careful because some engines have features that will continue turning the engine over. Boats. Usually, you can find a decent compression tester for under $50 at any of these places. This should only take 5-10 revolutions of the engine, and the gauge should stop going up. To perform a leak down test, you would pressurize the … Both sides will fight to the death of which is right and which is wrong. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Signs of a Bad Outboard Starter & How to Start the Engine. They are pretty standard . Depending again on the Two or Four-Stroke aspect of the engine. The compression test and test results are going to be the same! Your recently viewed items and featured recommendations, Select the department you want to search in, Enter a new vehicle to add it to Your Garage and filter the results below, Price and other details may vary based on size and color. At the same time though, what are you going to do when the engine doesn’t run? Two-Stroke engines should have a compression reading of around 110-130 PSI. Sometimes this is a simple fix and other times it is catastrophic. There's a problem loading this menu right now. Once you are looking at your engine and you get the ignition coils exposed. And if you would like to support us to continue bringing you great content, please click the link below to Amazon where we get a commission from anything you are already going to buy! Check here for special coupons and promotions. What the compression test tells us, is what kind of shape the mechanics of the engine are in. I like to check the spark and compression first, right off the bat.eval(ez_write_tag([[250,250],'bornagainboating_com-mobile-leaderboard-2','ezslot_18',113,'0','0'])); You don’t want to be the guy that spends 6 hours troubleshooting an engine just to find out that it has low compression. A compression test for an outboard is a simple test that can be performed on any combustion engine. Will determine what tools you will need. These testers are really good and surprisingly durable. Testing Compression In Outboard Motors 1. Deluxe Compression Test Kit 24 Pc. 1-2 minutes without water circulating and I know the impeller is shot but I am really worried about the motor. In my personal opinion, and experience of having performed possibly up into the thousands of compression tests. If it won’t get hot, do you skip the compression test and start testing other components of the engine? Why Won’t My Outboard Boat Engine Turn Over!? Get Your Own Born Again Boating Apparel! Compression test results will vary depending on what kind of engine you are working on. It will turn the gears in the lower unit, which transforms this motion to the propeller. When it finally quit working, I broke down and spent almost $300 on a Snap-On, I’ve gone through 5 stem valves, and the screen is cracked, and that is only in the first six months of owning it! You want to take out the bolts that are holding the coils in. Number of Kits: 4 piece. Gauge Diameter, Each. Sometimes having compression as low as 80 and 90, the engine will still run great! . doing a compression test on an outboard motor? Brand: Innova. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. If it doesn’t run, it won’t get hot. Yet, this vital... Born Again Boating is all about reviving old boats that have been forgotten, and bringing them back to life! If the compression is too low though, it will not run at all. As we stated earlier at the beginning of this article. Of all the critical factors necessary for reliable engine performance, a good compression level is certainly one of the most critical. As to... Signs of a Bad Outboard Water Pump & Maintenance Tips. What Outboard Compression Test Results Mean. This rings especially true when you are performing compression tests with purpose. Such as when you do your own service, and you would like to check the compression while doing so. Four-Stroke results should be somewhere in the 180-210 PSI range. Some people will say differently, but when we get down to it. This complete engine compression test kit includes everything you need to check valves and rings, perform carbon buildup inspection and test for late timing on a wide range of vehicles. Dimensions: 12 x 15 x 5 inches. Forgetting to tell you that they were backing down on a sailfish and the engine was partially submerged underwater! You can also run a hot mix of engine cleaner and try and burn off any carbon that is on the valves and get the compression back that way.eval(ez_write_tag([[250,250],'bornagainboating_com-leader-3','ezslot_10',116,'0','0'])); Outside of simple fixes like that. 2021 … $79.99. The first is called a leak down test. Selecting the Best Outboard Motor. Just pull the spark plug wires off of the spark plugs, and then using the correct socket for your plugs. You got the boat packed with your gear and your best friends. Part Number: 3612. These are good readings. Compressing a fuel and air mixture to a certain point, and then setting it on fire.eval(ez_write_tag([[468,60],'bornagainboating_com-medrectangle-3','ezslot_19',106,'0','0'])); When the mixture explodes inside of the cylinder, it will push the piston back down. Top subscription boxes – right to your door, © 1996-2020,, Inc. or its affiliates. For each cylinder, remove the spark plug and screw in the fitting that the gauge connects to. There are two basic ways to compression test an outboard. Instead, they have intake and exhaust valves that also need to close, and they have a much higher compression reading. I want to throw this in here because it really doesn’t matter what manufacturer or brand engine you have. By Jim Hendricks. Bounce/Leakdown Method This test can be performed without a compression gauge. It really helps us out and we thank you so much for your support!eval(ez_write_tag([[300,250],'bornagainboating_com-leader-4','ezslot_13',118,'0','0'])); Here are some other articles that you will find extremely helpful! For those who would just like to check out your engine. First, turn the outboard motor over by hand, using the recoil start ideally at the normal starting pull speed. Depending on what brand of engine and what kind of engine you are trying to test. It is tearing into the engine and investigating what is going on or just getting the engine running and run it until it explodes! Is that really the case though? The biggest player in the electric outboard motor market, Torqeedo makes outboards from one to 80 horsepower. We’ll talk about low results in a minute. Torqeedo Outboard Motors. Order Compression Tester for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Something that a lot of people wonder about. When you go to start the engine, it simply clicks. At its most basic, a compression test will tell you whether or not an engine cylinder has good compression. We hope it has helped you out and cleared up any questions that you might have about performing an outboard compression test. An outboard gas engine actually needs five things to operate correctly. Aaron has been working in the Marine Industry for over a decade and holds certifications for Yamaha and Mercury Marine. That drives the boat forward. If a valve carbons up or burns up, then the air will escape past the valve and loss the compression as well. Another way is to have someone turn the key over, again depending on what kind of engine you are doing this on. Just Click Here! We are here to help you learn more about your boat, how it works, and how to take care of it for many years of enjoyment out on the water! It is the very basic test that can provide the tester with the viability of the engine itself. There are really only two things you will need once you get to this point. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Part Number: LAG-TU-21C Not Yet Reviewed Here are all of the things that you need to know about low compression on an outboard engine, what they mean, and how they affect the running of the engine! Or you can always go down to your local auto store, napa, advanced auto, AutoZone, or whatever is in your area. This is going to be expensive, and the engine is trashed! to bottom - 80, 80, 90, 55. The kit comes with an extension hose, straight and angled fittings and a rubberized gauge protector. MILLION PARTS Professional Auto Engine Cylinder Compression Tester Gauge Meter 0-300 PSI Valv… Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI. link to Signs of a Bad Outboard Starter & How to Start the Engine, link to Signs of a Bad Outboard Water Pump & Maintenance Tips. It is a good idea to run a compression test on engines that have a lot of hours, or years on them. These are the best results for a sound, and mechanically solid engine. As long as it fits your engine, you are good to go! This outboard motor is a 2-stroke traditional engine that will produce 2.5hp. eval(ez_write_tag([[336,280],'bornagainboating_com-large-mobile-banner-1','ezslot_0',119,'0','0'])); How To Inspect A Boat Before Buying & Avoid Buying Someone’s Problem! What Outboard Compression Test Results Mean. There isn’t any need to continue holding the button to see just how much more you can get. Request The Next Technician's Tuesday Video Topic. OTC 5605 Deluxe Compression Tester Kit. A compression test reveals the condition of your engine's valves, its valve seats, and piston rings and whether these parts are wearing evenly. I used that tester for about 4 and a half years and did probably 400 hundred or so tests with it! You will find that in most cases, the whole story hasn’t been told to you.eval(ez_write_tag([[300,250],'bornagainboating_com-leader-1','ezslot_15',110,'0','0'])); Someone might say, the engine won’t run, it was running fine. NAPA SERCLT2 at … When you are being paid to troubleshoot and figure out a problem. Deluxe Compression Test Kit 24 Pc. The gauge on the tester will register at the highest indicated compression reading. So if you do see low compression results, try to warm the engine up if it will run and check again. Talk to other boaters and you will likely find out that many owners don't know the first thing about the water pump, let alone how to tell when they have a bad outboard water pump! The fitting screws into the spark plug opening and fastens it with an O-ring. A compression test would be a partial help (along with a spark check, and some other inspections) if you were not getting a full sea-trial and on the water lake test. okay so I remove all the spark plug wires, then remove one spark plug and put the compression tester in that hole, and id put the boat throttle all the way down, and then turn the engine 4 rotations and read the results... is this correct? Yamaha Outboards. You might be wondering this question, as I’ve had to answer it many times over the years to newer mechanics and boaters. Cylinder Leak-Down Tester. OTC 5605 at $80.68. You will need your socket sets to remove the coils and expose the spark plugs.eval(ez_write_tag([[336,280],'bornagainboating_com-medrectangle-4','ezslot_11',107,'0','0'])); The next tool you will need is the correct deep well socket that will get the spark plugs out. As well as what the results mean for you! Suitable for both freshwater and saltwater, this outboard motor by Sea Dog Water Sports will give you more versatility. In a car, it will turn the transmission and then, in turn, spin the wheels of the car around. If it isn’t making compression, it’s not a good engine! Then, where is the start solenoid so we can get to turning the engine over. This is a question that a lot of people go back to the idea of hearing the word “compression test” and immediately thinking. Invincible 36 Open Fisherman Review. Will An Outboard Run With Low Compression? You will need a compression tester, and a way to turn the engine over. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI. We have a couple of compression testers that you can get from Amazon on our resources page here. It happens to be among the lightest small outboard motor weighing only 21 pounds. How to choose between four- and six-cylinder outboard motors for your boat. Clearance. The second stroke of a four-stroke internal combustion engine is the compressing stroke. Compression Tester, Small Engine, 14mm, 18mm Adapters, 0-200 psi Range, 10 psi Increments, Stop Valve, 2 1/2 in. 2021 Boat Buyers Guide: Flats/Skiffs. & R. 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This is where you will need a couple of specific tools. Which is a great thing to me, because it shows a person’s willingness to learn! Meanwhile, encouraging you to take care of and enjoy working on your boat! Having the engine warm and getting oil up into the cylinders sealing the rings and valves better. So the hot and cold thing can go either way. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Its hard to find good data supporting what an appropriate measurement of cylinder compression should be in older outboard boat motors. It will prove whether the engine has a good powerhead or not. Two-Strokes generally get low compression when the piston rings fail. A compression test for an outboard is a simple test that can be performed on any combustion engine. Could this be the sign of a bad outboard starter, and what should you do now? The pro … Sometimes having a professional’s opinion is a great idea. Should be warm but if not it's not a deal breaker, readings will be a little low. See More Reviews. The motor is a 1973 2-stroke and the readings with this tester were from top cyl. Learning How to test outboard motor compression will provide an indication on whether the piston-rings are in an operational order and whether the cylinder is in good working order. ... it should be fairly easy to perform a compression test on a motor; however there are many different types of motors today that can make this test a lot more difficult. Depending on the brand and manufacturer of the engine, it will determine what you can do at this point. When you are doing a regular service on a 15-year-old engine with 1500 hours. For this reason, they are a popular choice for small boats. It isn’t a bad idea to check the compression just to see if the engine is still in good shape or not. Compression testing is an extremely valuable diagnostic exercise for ensuring the continuing health of your L-series engine, or really any engine. That it is most definitely better to do the compression test with a little warmth to the engine. Compare to. It is the very basic test that can provide the tester with the viability of the engine itself. Get the best deals for outboard tester at Response must be less that 100,000 characters. That is never good for anybody! This will allow more air into the system, and you should see the readings come up to that 180 or so range. You will need a basic set of sockets and a wrench to remove any kind of plastics or covers that protect the ignition coils. $ 49 99. and do this for all four spark plugs? As in any combustion engine, the power of the engine is made when a piston moves upward in a cylinder. Find the factory specs for the motor so you can compare to your readings. It is simply a test to check out the integrity and viability of the engine. Subscribe to the channel and then add us to your favorites so that we can become your go-to resource for finishing all of your DIY outboard and boating service and projects! For us in the boating world. I was wondering what kind of problems to expect. We talked a little earlier about getting a compression tester at any auto parts store for sometimes under $50. You will get the best readings. Bringing us to the next tool that you will need. Compression testers can be extremely affordable. There has to be a reason that causes an engine to have low compression, and there is. They both have different aspects to them that make them beneficial. Take your remote start button and hook up to the starter solenoid on the engine. Remove all of the spark plugs. Mainly, there is a big difference between Two-Strokes and Four-Strokes. If you are dealing with an older engine with a lot of hours and it isn’t running. More Boats. And you can also donate by clicking the donate button here or on the right hand of the screen! With the coils disconnected so the engine doesn’t start, crank the engine for about 10 seconds. Now you can take your compression tester and thread the hose into any cylinder that you want to start with. That’s it; the rest is the same. eval(ez_write_tag([[468,60],'bornagainboating_com-box-3','ezslot_2',105,'0','0'])); Here is everything that you need to know about outboard compression tests. 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Then there is also the time when you are doing troubleshooting. ... Suzuki outboard compression tester adaptor part # 09918-02410-000 See more like this. The first thing that most people think of when they hear the words, “compression test,” is expensive. I recently ran a compression test for my 85 horse Mercury outboard motor. An outboard gas engine needs air, fuel, spark, compression, and unobstructed exhaust — in the right amounts and at the right time. How to Compression Test on Mercury 2-Stroke Outboard Engine November 17, 2016 Repair Manual Do-It-Yourself Outboard Repair Guides 2 Its highly recommended to always use a outboard repair manual for your specific year and model outboard engine when preforming a cylinder compression test on your motor.