displayMicroOffers: false, 1855 Alpine Avenue NWGrand Rapids, MI 49504This email address is being protected from spambots. Many single-engine boats mount a smaller auxiliary motor for emergency use. Determining Your Boat Transom Angle The transom angle - commonly measured in degrees - is the transom's vertical inclination. Why wont Touch ID be under the screen in the iPhone 15 and iPhone 16? To do so, take a measurement from the very top to the very bottom of the transom in the precise center. document.getElementById('cloakd53b59933f6c3f2e8b59f1b4a6d41fa5').innerHTML = ''; The collapsing bubbles are loaded with extremely low-pressure water vapor, which causes damage to a variety of surfaces as they collapse. The height of the boat transom dictates the size of the outboard motor. For boats equipped with a bracket, calculate the same measurement but based on the bracket and not the transom. If you decide to make adjustments, please consult a marine engine dealer about the boatdesign. hulls, such as Allisons, Bullets, Strokers, etc., this measurement could Save my name, email, and website in this browser for the next time I comment. 12 Small Fishing Boat Accessories to Buy Today. A: The short answer is Yes. Get the latest updates on new products and upcoming sales, 2023 Marine Parts Warehouse Incorporated Usually speaking, the farther the outboard is set off the transom, the higher the propeller should be in the water (or the higher the outboard can be mounted). A long shaft engine requires a height of 20 and extra-long shaft engines will need a transom height of 25. However, you will need an understanding of how the degrees will alter the boats usability. Place the point of a yardstick at the middle of the top of the boat transom. Motor height on pontoon? | Boating Forum - iboats Boating Forums Amazon has plate extensions to allow adjustments without buying a new motor: T-H Marine Jack Plate Extension. Beyond motorboats designed for large outboards, you will see outboards hanging on the sterns of everything from small canoes to large cruising sailboats. Not to measure boat speed, but to gauge the mounting height of the outboard motor on the boat transom. Top 10 Choices for Boaters, Mercury Introduces 600HP V12 Verado Outboard Engine, The Outboard Expert: Tohatsu Propane Outboard Engine. publicId: "32bf3437d1346295e03ebcf545f9c839", Finding the right size is a matter of looking at what youve got and taking out the measuring tape. 3 0 obj Copyright 2017 Dealer Spike All Rights Reserved. Youll need a short shaft outboard if its 15 or less than an inch shorter. Proper Mounting Height for an Outboard - Gone Outdoors <> s.setAttribute("type", "text/javascript"); and I'll explain it better, (or point you to someone that can help. How To Measure Outboard Motor Shaft Length [Long v Short] - Boating Hub According to MarinePartsMan.com, the outboard can be raised 1 inch above the standard height for every 10 miles per hour of speed the boat can attain. (Putting a While this is the case there is certain saltwater motors that are extra extra long at 30 and 35 shaft. steel ruler, etc. Any owner seeking the last bit of speed from an outboard-powered boat should grab a yard stick. There are 2 steps to help get a relatively accurate figure. on How to Measure Outboard Shaft Length: The Only Guide You Need, ePropulsion vs Torqeedo: An All-Round Comparison, 55 lb Thrust Trolling Motors: All You Need to Know Before Purchase, Spot Lock Trolling Motor: Is It Worth It & Best Options in 2022, Wiring 24V Trolling Motors: 24 Volt Wiring Diagram (with Video), LiFePO4 Battery: Why Lithium iron Phosphate Batteries Are Your Best Options in 2022, Minn Kota vs MotorGuide: Best Option in 2022. Yamaha Outboard Motors: How To Measure Leg Length function loadScript(script) { The average transom angle is around 14 degrees. Small portable outboards ranging from 2 to 20 horsepower are usually sold only in short or long shaft versions. Outboard Motor Shaft Length & HP to Boat Calculating } It will ensure that the outboards trim will be effective, and it will save you gas too. ), Al Shields If you decide to make adjustments, please consult a marine engine dealer about the boat design. I mean, who wants to purchase something as expensive as an outboard to only realize you bought the wrong one. minAmount: 300.0, brackets. clearInterval(interval); Keep these numbers in mind if you ever have a need for a new outboard motor for your boat. It also decreases the boats lift and increases the time it takes for the boat to reach plane. The mounting height of an outboard motor can impact the speed and handling characteristics of the boat. One of the main concerns is causing the engine to overheat if not enough water reaches the engine to keep it cool. My family and I used it to fish, ski (yes, you can ski behind a pontoon boat), and cruise the lakes near our home. Increased RPM and additional horsepower feed the need for speed. Other factors to consider when determining the mounting height of an outboard are related to performance. Depending on the manufacturer, size names might change. 7. How high exactly do you have to raise the transom?- - Outboard Jets The anti-cavitation plate above the prop needs to be within an inch of the bottom of the transom, therefore, the prop should be well below the transom. Check out the full chart of the Mercury outboard model code and its features. Generally, the anti-ventilation plate on most engines is aligned with the bottom of the vessel. var prefix = 'ma' + 'il' + 'to'; Since the ventilation plate & foil are burried under water it is obviously too low. 1 0 obj Safely but briskly accelerate. not sure that it's still used. Anything bigger than that your obviously going to need an extra long shaft. Whats the best height for my boat motor? This would not be a good thing. In extremes, the engine can have overheating problems if the boat is raised to a point where the water inlets for the cooling system are out of the water. The transom is the flat vertical section at the rear of the boat. On most newer center consoles and offshoreboat transoms might include a rear door leading to a swim platform as well as a molded setback bracket. Other boats that need extra long shafts are: Read my other articles on outboard motors. There are also specialty motor shaft lengths. out the confusion. (Any measurement given as "off the transom" To sum up, there is a simple calculator of the shaft length for outboard motors: Outboard Shaft Length = Transom Height +/- Factors. How do you measure a transom on an outboard motor? If mounting directly to a boat transom: Measure from the top of the transom down to the bottom of the hull or keel (lowest point). The transom is the flat vertical section at the rear of the boat. % If it measures between 17 and 22, youll want to go with a long shaft motor. boats.com, 1221 Brickell Avenue, 23rd Floor, Miami, FL 33131, USA. will be to the flat part; if you measure to the bottom of the brackets to where the brackets were actually resting on the transom. It is unsafe to have the engine block too close to the water on a low transom. :$I>M W$h"%U_yzIb?]NHg_G|r@nX eTf."SQ The point where these measurements intersect is your centerline. The shaft length for outboard motors has nothing to do with the water line. In the case of a larger offshore boat, it may be to the top of a cutout on the . Its still smart to measure it yourself though, just in case, the design changed over the years. xmlHttp.open('POST', 'https://bes.gcp.data.bigcommerce.com/nobot'); How Transom Height Is Measured If your boat planes, pay extra attention to getting the shaft length as close to perfect as possible. You run the risk of possibly unsafe handling if you attempt to put a long shaft engine on a transom designed for a short shaft engine. Safely but briskly accelerate. The Effects of Standard, Lower and Higher Mounting. %PDF-1.7 For over five years he has worked as a newspaper reporter and historic researcher. Read the measurement on the transoms bottom. This measurement was approximately 4". #2. The boat transom can be flat with zero degree angles. var h = d.getElementsByTagName("head"), endobj Required fields are marked *. <> The propellers will also have trouble reaching the water. This, however, is not recommended for the beginning boater. up to the bottom of the motor brackets, (as in #1). disregard the "hooks" at the front of the s.setAttribute("href", "https://cdn.paytomorrow.com/css/pt-mpe.min.css"); You reply, "Im not sure, I think its a long". x\[D~OUCO6[j](l%ay <8cylY{.L2s#]~U6A|Wj]-oo|mubqY6wbY_|!>Z8(RB:RHeTzOGO_=~t\ Step 2: Three Variables to Consider Setting Height of Outboard Motor - YouTube 0:00 / 0:46 Setting Height of Outboard Motor nates90 71 subscribers Subscribe 83 Share 63K views 7 years ago #boatservice #outboardmotor. For slower boats, its less critical to. Disclaimer: As an affiliate I may earn a commission on any qualifying purchases, including those from Amazon.com, at no extra cost to you read more. In the second photo, we've measure down from the top of the Detwiler With this in mind, how can I determine if my outboard has a short or long shaft? I also love helping others, which is why I created this website. Small motors built for sailboats might come in a unique configuration with an extremely long shaft since these are mounted higher off the water. MarinePartsMan.com also says that V6 bass-boat engines have a 20-inch shaft. Thats it. It is possible that the motor could hang low while transporting on the boat trailer causing future boat repairs. The average transom angle is around 14 degrees. With some boats I have a pretty good idea as to what length motor should be hung on them. This is the dimension you'll need to know when deciding between a short shaft, long shaft or extra long shaft for your outboard motor. If your boat is newer and the manufacturer is still in business, you might also want to try to give them a call. If you have an outboard motor, the distance from one end to another will be found on the side or on a label near its bottom. But opting out of some of these cookies may affect your browsing experience. One of the great things about an outboard motor is how versatile it is. <>/Metadata 127 0 R/ViewerPreferences 128 0 R>> By clicking Accept, you consent to the use of ALL the cookies. The motor is what powers the boat so the two go hand-in-hand. Any questions? loadScript(ptScript); What Kind of Fuel Does Your Marine Engine Need? It is possible that the motor could hang low while transporting on the boat trailer causing future boat repairs. Also, the boat will be more likely to hit bottom or submerge objects such as rocks or logs. Some outboards have a serial number that tells you which shaft length to go for. One of the main concerns is causing the engine to overheat if not enough water reaches the engine to keep it cool. want to measure from the transom to the flat part of this bracket, Allowing the propeller to pull water from underneath and push it out behind the boat. Trimming in, trimming down, and trimming out are all terms that a beginning boater should learn. A big NO. Some may call it a standard length while others may call it a short or a long shaft. I run a 9.9 Mercury Bigfoot 20" shaft off the swim platform of my 89 Trophy 2160. Its where the outboard motor is attached, and its also where some boat owners put the boats name. The transom in a boat today is a place to hang your outboard motor. Take a long straight edge, (long carpenter's level or long Transom Outboard Engine Position - YouTube If the propeller fails to ventilate, the motor is mounted to low. These are vertically aligned so the boater can make adjustments. Some boats are equipped with transom-hung outboards while others have a bracket. The boat transom can be flat with zero degree angles. Attention: Remember to measure the outboard shaft length straight up and down instead of measuring along the transom. Spark Plug 25.0nm(18.4 Ft-lb) (2.55 Kgf-m) WHAT LENGTH OUTBOARD DO YOU REALLY NEED? - Van's Sport Center With the motor trimmed so that the propshaft is parallel to the keel, the anti-ventilation plate should be just about even with your straight edge, and thus even with the boat bottom at the keel. If you are looking to repower, they may be able to offer some sage advice. Beginning boaters should be aware of the boats measurements. Check out the Westshore Marine & Leisure Youtube page! Always weigh the risks of making adjustments. No matter what size of boat you are running, one of the most critical choices you can make when buying an outboard motor is the shaft length. What is the Virtual Sundance Film Festival? Extra-extra long shafts are 30-inches long. Place the clubs bottom on the ground as though it were going to be used to strike a golf ball. It was a 23-foot Crestliner Grand Cayman pontoon boat. At least if its too long you can raise the motor or "build up" your transom. A deep Vee hull will result in a different measurement than a flatter . To do so, measure from the stern (back) of the boat to the midpoint of the hull on both sides. You must be still in the blue about that matter. Which Navigation Lights Does Your Boat Need? A yardstick will help you determine if your outboard engine is at the right height. In lower mounting, the engine is set lower than the recommended standard. Then test the boat and adjust the height, if necessary . There is a simple test to see if your outboard motor is set at the best height. However, the motor should not be raised more than 5 inches above the standard position. maxMicroAmount: 0.0, There are instances where a lower mount may be okay. You will also risk hitting bottom or submerge objects more frequently such as rocks or logs. gtag('js', new Date()); Generally, short shaft outboards are 15 inches, long shaft outboards are 20 inches, and extra-long outboards are 25 inches. When the boattransom is too low, the motor could end up underwater. To measure your outboard motor shaft length, measure from the bottom of the mounting bracket where it rests on the transom to the top of the cavitation plate, this is the horizontal surface of the lower unit immediately above the propeller. The boater must also consider if the boat transom support is designed to bear the weight of a higher mount. Engine height with stepped hull at transom - before I screw things up How do you measure a transom on an outboard motor? Here we will guide you in how to get the right boat transom height. (In the case of the faster Engine Oil Type Genuine or Recommended 2str Engine Oil. jackplate to a point level with the top of the transom. Recommended Engine Oil 2-Stroke Outboard Motor Oil. Outboard motors can be fitted to a variety of boats, so manufacturers have standardized their engines to go on virtually anything. Knowing how this can affect the overall operation of the boat is a factor to be considered. This cookie is set by GDPR Cookie Consent plugin. window.dataLayer = window.dataLayer || []; Follow Westshore Marine & Leisure on Twitter! motor brackets The standard installation of an outboard has the top of the transom of the boat at the same level as the bottom of the motor portion of the outboard. Tilt your motor until the bullet of the gearcase is On this type of boat, if you are in doubt, default to the longer-shafted outboard. For really big boats, the biggest and baddest six- or eight-cylinder outboards can have extra-extra long shafts up to 30 inches. Lubrication System Engine Oil Mixed Gasoline. The pros and cons of properly . Measure straight down to the lowest point on the hull. What are Apple Podcasts Subscriptions and Channels? How to Measure a Boat Transom - Gone Outdoors Ask a friend to hold one end of a measuring tape at the extreme outer edge of the top of the transom while you pull the tape across its width to the opposite outer edge to measure the "length of the taffrail," which is the width of the boat across the top edge of the stern. As a dealer I run into this situation from time to time, which is fine but getting the right length outboard for your boat is crucial. But in many cases, its a little more complicated than that alone. As mentioned above, the operation of the propeller relies on the transom height. An outboard motor can drive just about any sort of boat with proper mounting. Now that you have a better understanding of boat transom heights its time to take out the ruler and get the perfect measurements. parallel with the straight edge.
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