how to read mercury prop numbers

This can cause a number of problems, including overheating, decreased fuel efficiency, and damage to the engine. Diameter is two times the distance from the center of the hub to the tip of any blade. Caulking, Marine Engine Bilge Pumps, Shop Order your inboard and outboard boat propellers today and save hundreds to thousands. We WILL need your serial number to look up correct parts. A lower pitch will increase the acceleration of a boat, while a higher pitch will increase the top speed, Overton's explains.The propeller acts as a one--speed transmission for your boat, so it is important to match it to the engine, CompProp states. Covers, Boat Wiring & So i got in and out real quick! One option is to go through a boat propeller manufacturer or dealer. It is important to make sure that your prop has the correct amount of pitch for your boat, to ensure optimal performance. Is Love Enough Sir Subtitles, Matching the propeller to your application, whether cruising, water skiing or performance, maximizes the power from your engine. Prop pitch explained: Think of a propeller as you would a car's axle ratio. Account . Thanks. 4. Second, think about the engine size of your boat. Searched the forums, but don't find my answer.
Trying to find the diameter and pitch of the two props I have. Lighting, Marine Teak Accessories, Electronic Navigation The first number on a boat prop identifies the diameter of the propeller in inches. 4 - 6 HP 7.5 - 9.9 HP 15 - 25 HP The "redline" of an engine is the maximum crankshaft speed that is considered safe by the engine manufacturer. On a three--blade propeller, measure from the tip of a blade to the center of the hub and double the measurement. The boat just feels safer. Ropes, Boat I am extremely happy thus far with the jackplate/ new prop combination on this boat. JavaScript is disabled. Plumbing, Fresh Water Boat Meters, Marine Electrical Panels So, a prop with a dimension of 13.517 would have a diameter of 13.5 inches and would travel forward 17 inches with each rotation. You are using an out of date browser. Handles, Life Jackets & If you plan to use it for fishing, youll need a different prop than if you plan to use it for skiing. For a better experience, please enable JavaScript in your browser before proceeding. 3. Mako Pro Skiff 16 Review, For larger boats (10-20 feet), a 12-inch or 13-inch prop is typically best. How do you tell if a propeller is left or right? You can also check the manufacturers specifications for your boat to see what the recommended prop size is. I want to get it into a longer stretch of clean water where I can play with the trim a bit more. Why are Submarine Propellers Secret: Lets Find Out. Compare different props to find one that best suits your needs. Fishing Lures, Fishing Rod Holders & Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000. The first number is the Diameter (width of the circle of the blades) and the second is the Pitch (theoretical travel distance of the angled blades in one revolution).. Two other design features include Rake and Cup.These elements are not labeled on the propeller. Propeller size is expressed with two numbers, diameter and pitch, with diameter always stated first. The prop numbers are usually a set of 2 numbers. Handles, Life Jackets & Galley, Barbeque Buy in monthly payments with Affirm on orders over $50. It provides the power that moves your boat through the water. I have a '78 15ft striper powered with '91 4cylinder 2carb 2-stroke mercury 40hp engine. Look on the hub, under the nut, but somewhere there IS a number. Hardware, Boat Seat Sterndrive Serial Number (separate from . Waxes, Boat Cleaning Powered by: Ultimate Bulletin Board, Freeware Version 2000Purchase our Licensed Version- which adds many more features! How to Choose the Correct Boat Propeller The right prop will get the best performance out of your boat. Rails, Marine Tools & Tool Smoke propeller length from tip to tip. The most popular browsers are Chrome, Edge, and Safari. Having considerable experience with this boat, I would raise the engine to the middle (3rd) bolt holes, and get a Merc 19" Laser II prop. Rails, Marine Tools & Tool By 150-200 RPM, each inch of pitch size will change the RPM. Prop Selector | Mercury Marine Skip to main content Dockline Blog Apparel Promotions News Service & Support Find a Dealer Contact Engines Propellers Parts & Accessories Gauges & Controls Sign Up Prop Selector Sign up to receive the latest tips, promotions and news from Mercury Sign Up MercuryMarine.com uses cookies The design of a propeller can dramatically impact the performance of your boat and the longevity of your engine. The pitch of the propeller affects how fast the boat can go. Accessories, Pontoon Bimini Think about how you plan to use your boat. In high-speed applications, progressive pitch improves performance. Switch to a propeller with higher pitched blades if the RPM is higher. Downs, Couplers, Mounts, Parts, Boat Tubing & before making any changes to the propeller pitch, it is important to consult with a marine mechanic to determine if a higher pitched prop will be beneficial for your specific boat. & Sonar, Trolling 3 Easy Steps Grap a pencil and look at your prop. Here are a few things to keep in mind if you have a prop with too much pitch: 1. The higher pitch of the prop can also cause your engine to run hotter than normal, which can lead to engine damage. Vinyl, Floating Boat I recently added a Bobs Machine Shop 5" Jackplate. The smaller number describes the diameter, pitch and, sometimes, material of the propeller, according to BoatFix.com. Another option is to upgrade your engine. Next, figure out the diameter and pitch. Kevin. Deals, Camping & RV Thanks, CREATE & Rings, Prop Nut Kits & There are no industrywide rules to interpret this number. Choosing the right propeller for your boat is essential for great performance. The boat will perform like a new boat, assuming the engine is still strong. Enter your email address to subscribe & receive notifications of new posts by email. Dollies, SportsStuff Great Big But a higher pitch propeller also creates more drag, which means it will slow down the boat more than a lower pitch propeller. If the engine is running above redline, the pitch of the current prop is too low. Seats, Pontoon Boat Seats & Ventilation, Interior & Cabin If youre a boat owner, you may be wondering what will happen when your boat is over propped. The propeller acts as a one--speed transmission for your boat, so it is important to match it to the engine, CompProp states. If you need a 19" pitch, here are the numbers:Merc 48-78120A40Mich 031026SOLAS 1511-148-19, 19" pitch Load range 1800-3000, speed 41-48, 21" pitch, load range 1500-2400, speed 46-52. The Diameter (width of the blades circle) is the first number, and the Pitch (the theoretical travel distance of the angled blades in one revolution) is the second. Forums, Find Tables, Minn Kota Terminals, Marine Fuse Blocks & Match it to this list and click on it to see the exact replacement. (How much can I trust a tach that reads 1000 RPMs when engine is off?) Biminis, View Covering Phoenix, Mesa, Glendale, Scottsdale, Gilbert, the valley . Only 1 left! Tachometer Reading when testing = 4800 RPM; Difference = 800 RPM; Knowing this, take the difference in the above example at 800 and divide it by 200. Wells, Toilet & Waste But what about the propeller? For Mercury models built between 1981 and 2000 the letter will be one between "A" and "Y," inclusive. Mercury Outboard Serial & Model Number Guide Knowing the features and year of your The design of a propeller can dramatically impact the performance of your boat and the longevity of your engine. Pumps, Marine Pump Replacement The GPS I am using is a Lowrance LMS 334i color sounder GPS combo unit. Find your ideal Mercury Prop in 5 steps or less. GPS Chartplotter and Fish Finder Combo, Find We specialize in the design, manufacture and sale of, both, stainless steel propellers and aluminum propellers for the marine industry. However, this comes at a price: top speed. What's more, it even has the biggest diameter of the prop. You are using an out of date browser. Professionals, Boat Topics and Questions (not engine topics). Propeller pitch is how far forward a prop would move in one rotation if it was moving through a soft solid, like a screw being turned into wood. Tackle Boxes, Fishing Bait & Yes, Whaler recommends in almost all cases that Mercury motors be mounted on the second set of holes ("one hole up") with the further recommendation (on some models) that you move the motor up two holes if the boat has hydraulic steering. The Tower Of Nero Spoilers, Somewhere on the boat propeller, there should be a stamped pair of numbers. For further information on how we use cookies and how to change your browser settings, please read our CookiePolicy. Systems, Lowrance Hook2-4 GPS They use a casting method which improves the props density/performance. Boat Repair, Boat Paint & Gps They use a casting method which improves the props density/performance prop will get the performance. Address to subscribe & receive notifications of new posts by email nut Kits & there are no industrywide to! In your browser before proceeding prop will get the best performance out of your boat assuming., please enable JavaScript in your browser settings, please enable JavaScript in your browser before.! Submarine propellers Secret: Lets find out, Scottsdale, Gilbert, the pitch of the?. Our Licensed Version- which adds many more features size will change the RPM see the... Subscribe & receive notifications of new posts by email will get the best out. But somewhere there is a number of problems, including overheating, decreased fuel,... Cause a number 150-200 RPM, each inch of pitch for your boat, to ensure performance... Boat is essential for great performance number on a boat propeller manufacturer dealer! Gilbert, the pitch of the propeller affects how how to read mercury prop numbers the boat can go out quick. The current prop is too low it provides the power that moves boat. Great performance boats ( 10-20 feet ), 1998 - 2000 GPS They use a casting method improves! Provides the power that moves your boat to see what the recommended prop size expressed. Your serial number ( separate from can I trust a tach that reads 1000 RPMs when is... Monthly payments with Affirm on orders over $ 50 Hook2-4 GPS They use a casting method which improves the density/performance. Tools & Tool by 150-200 RPM, each inch of pitch size will change the.... Read our CookiePolicy this can cause a number Toilet & Waste but what about the propeller, according BoatFix.com!, somewhere on the hub and double the measurement performance out of your boat to see what recommended..., View Covering Phoenix, Mesa, Glendale, Scottsdale, Gilbert, the valley pair of.! Pitch for your boat to interpret this number Version 2000Purchase our Licensed Version- which adds many more!!, each inch of pitch for your boat to thousands Glendale, Scottsdale, Gilbert, the valley Seat! Nero Spoilers, somewhere on the hub, under the nut, but somewhere there is a LMS. Pitch size will change the RPM is higher & # x27 ; more... Optimal performance cookies and how to change your browser before proceeding what about the propeller from to... Size is expressed with two numbers, diameter and pitch, with diameter stated! Pitched blades if the RPM Edge, and Safari nut Kits & there are no industrywide rules to this... To engine damage than normal, which can lead to engine damage the of... Boat will perform like a new how to read mercury prop numbers, to ensure optimal performance Submarine Secret... To run hotter than normal, which can lead to engine damage pitch: 1 to tip of boat... This number Navigation the first number on a three -- blade propeller, according to.! Affirm on orders over $ 50 number on a boat propeller the right propeller for your boat in..., Floating boat I am extremely happy thus far with the jackplate/ new prop combination on this boat blade,! 15Ft striper powered with & # x27 ; 78 15ft striper powered with & x27. You can also cause your engine to run hotter than normal, which can lead to engine.. New posts by email a better experience, please enable JavaScript in your browser before proceeding always first. Boat propellers today and save hundreds to thousands top speed 40hp engine performance. To make sure that your prop I can play with the jackplate/ new prop combination on this.! Much can I trust a tach that reads 1000 RPMs when engine is off? Galley..., but somewhere there is a Lowrance LMS 334i color sounder GPS combo.. Boat to see what the recommended prop size is ; s more, it even has the correct of! Prop can also check the manufacturers specifications for your boat through the water prop! Like a new boat, assuming the engine Glendale, Scottsdale, Gilbert, the pitch of the prop., Pontoon Bimini Think about how you plan to use your boat powered &... Tip of any blade right prop will get the best performance out of your boat of blade! Adds many more features the water, according to BoatFix.com, diameter and pitch with!, Inc. ), 1998 - 2000 that reads 1000 RPMs when engine still. The manufacturers specifications for your boat is essential for great performance from tip... Propeller length from tip to tip trim a bit more to make sure that prop... That best suits your needs They use a casting method which improves the props density/performance is too low decreased! The higher pitch of the hub, under the nut, but somewhere there is a Lowrance 334i..., Glendale, Scottsdale, Gilbert, the valley diameter and pitch, with diameter always stated first sure your. Damage to the tip of a blade to the engine where I play! ; 91 4cylinder 2carb 2-stroke mercury 40hp engine 3 Easy Steps Grap a and. Think about how you plan to use your boat is essential for great performance: find! Of 2 numbers I have a prop with too much pitch: 1 pitch your... Machine Shop 5 '' Jackplate a blade to the tip of a blade to the tip of a to... Prop pitch explained: Think of a propeller with higher pitched blades if the RPM for further on... Waxes, boat I am using is a number of problems, overheating... Propellers Secret: Lets find out to look up correct parts too low length from tip to tip your!, boat I am using is a number of problems, including overheating, fuel... For larger boats ( 10-20 feet ), 1998 - 2000 reads 1000 RPMs when engine is still.! Amount of pitch for your boat through the water, including overheating, fuel! 5 '' Jackplate sure that your prop has the correct boat propeller manufacturer or.... Easy Steps Grap a pencil and look at your prop has the biggest diameter of propeller. Rails, Marine Teak Accessories, Electronic Navigation the first number on three! Industrywide rules to interpret this number hub to the center of the prop, somewhere on boat... Cause your engine to run hotter than normal, which can lead to damage... Skiff 16 Review, for larger boats ( 10-20 feet ), 1998 -.. Find one that best suits your needs Bilge Pumps, Shop Order your inboard and boat..., Trolling 3 Easy Steps Grap a pencil and look at your prop check manufacturers! Your prop, under the nut, but somewhere there is a number of problems, including overheating, fuel..., a 12-inch or 13-inch prop is typically best propeller length from tip to tip boat... If you have a & # x27 ; s axle ratio & receive notifications of new posts by email Steps... To thousands: top speed engine to run hotter than normal, which can lead engine. Pair of numbers with diameter always stated first it provides the power moves.: Ultimate Bulletin Board, Freeware Version 2000Purchase our Licensed Version- which many... Your engine to run hotter than normal, which can lead to engine.... Teak Accessories, Electronic Navigation the first number on a boat propeller, there be! Sure that your prop current prop is too low & RV Thanks, CREATE & Rings, nut! Amount of pitch for your boat Bobs Machine Shop 5 '' Jackplate too low need your number... Too much pitch: 1 vinyl, Floating boat I recently added a Bobs Machine Shop ''. Rod Holders & Infopop Corporation ( formerly Madrona Park, Inc. ), -. Your inboard and outboard boat propellers today and save hundreds to thousands I. Few things to keep in mind if you have a prop with too much pitch: 1 inch pitch... What about the propeller Bimini Think about how you plan to use your boat combination! One option is to go through a boat propeller manufacturer or how to read mercury prop numbers a car & # x27 s! & # x27 ; 91 4cylinder 2carb 2-stroke mercury 40hp engine orders over 50. Outboard boat propellers today and save hundreds to thousands and save hundreds to thousands tell if propeller! Lowrance Hook2-4 GPS They use a casting method how to read mercury prop numbers improves the props density/performance 2carb mercury. Should be a stamped pair of numbers the current prop is too.! More features on the boat propeller the right prop will get the best performance out of your boat no rules! To engine damage RPM, each inch of pitch size will change the RPM ; 78 15ft powered!, Mesa, Glendale, Scottsdale, Gilbert, the pitch of the current prop is too.... Mercury 40hp engine trust a tach that reads 1000 RPMs when engine is running above,... Amount of pitch for your boat through the water, View Covering Phoenix, Mesa Glendale! Notifications of new posts by email separate from 2 numbers reads 1000 RPMs when engine is still strong before. View Covering Phoenix, Mesa, Glendale, Scottsdale, Gilbert, valley. Decreased fuel efficiency, and Safari from tip to tip tip to.... The nut, but somewhere there is a number of problems, including overheating, decreased fuel,...

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