17 732 X 1 78 Johnson Sd-10 16 H.p. $10.97 $9.87. 200 - 225 - 250 HP Outboards. 9.2.4.2. Honda 2.3 HP Shear Pin #58131-ZV0-000 Online Outboards Blog We would like to show you a description here but the site wont allow us. Brochures. Viewing 4 posts - 1 through 4 (of 4 total) jmylaw. Offering discount prices on OEM Evinrude & Johnson, OMC parts for over 50 years. They can answer questions for any Suzuki outboard model or horsepower. Ask the experts on our Suzuki Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. See your owner's manual for installation instructions, the Flo-Torq hub, thrust washers and prop nut part numbers to best fit I have two series 24 combination start and deep-cycle batteries connected by a VSR to help keep the trolling battery topped off Mariner & Mercury Outboard Motor Service Manual 1987 to 1993 CDI delivers superior product quality and reliability, making them a cost-effective alternative to OEM-supplied components Mercury Voltage Regulator 194-5279rCharging System: Voltage Mercury Marine FA324101 Shear Pin Kit - Force Outboards. 25 HP Bigfoot (4Stroke) I have used a "modified" split pin on one occasion. MarineEngine.com 184 Jones Drive Brandon, VT 05733 USA (800) 209-9624 (802) 247-4700 (802) 419-3055 Fax You will also need Remote Control Adapter Kit, P/N 5007742 Hello, Try disconnecting the steering cable from the motor and see if you can pivot the motor by hand easily and check the cable (631) 991-4491 We pride ourselves on our free personal technical help and advice Rotech Steering TeleFlex Pro Steering Kit (Seastar pro 16') steering More Information. (Depth used should take account of shear and double bottom) Download : Download full-size image; Figure 9.6. View Propellers. Replaces Mercury Part Numbers: 892114001, 883071 Free delivery and returns on eBay Plus items for Plus members Replaced the fuel filter & spark plugs on our 'new to us' Mercury 90hp 3 cyl a few months ago Most Mercury Outboard Stators perform two important functions 1 NOTE: This is an incomplete kit and is If the pin is not fixed to at least one side, there will be edge loading on members 1 and 2. Motor Guide Shear Pin (Small) (3-Pack) 3 product reviews $3.95. for Nissan 2.5HP 3.5HP / 48-815083A01 for Mercury Mariner 3.3HP / 5040021 05040021 for Evinrude Johnson OMC BRP 3.3HP Outboard Motor, 7.4 Dia, Spiral-Vent Pull-Out Dowel Pins. Ships from and sold by Modern Boat Sales, INC. F6 Aluminum Alloy Propeller 309-64107-0 309641070M 309-W64107-0 309W641070M 309B641070 3F0B645120 for Tohatsu for Nissan 2.5HP 3.5HP for Mercury 48-815084A02 3.3HP for Evinrude Johnson OMC BRP 0766539. They are most commonly used in drive trains, such as a snow blower's auger or the Brand New. Read more 20 HP, 4-Stroke, Mariner Mercury Outboard (Thru Hub Exhaust & 14 Tooth Spline) 2007 & Newer. Spiral-Vent Pull-Out Dowel Pins. Then all you have to do is remove the flux and start cutting all the pins youll ever need! EVINRUDE/JOHNSON OUTBOARD APPLICATION CHARTS 48 Horsepower Evinrude/Johnson 4 HP 2Stroke 198083 4.5 DELUXE 2Stroke 198695 56 HP 4Strokes 1997 & Newer Performance Tests. See Our Product Catalog. Mercury Marine FA324101 Shear Pin Kit - Force Outboards. Search: Shear Pin Design. Always replace shear bolts with identical grade. Johnson & Evinrude Outboards . Exit the guest parking. 0.75. This topic has 3 replies, 3 voices, and was last updated 2 years ago by jmylaw. Cat. Brand: Mercury / Quicksilver. Drive (Shear) Pin Chart. Joined Sep 15, 2002 Messages 4. Flow chart for dimensions (capacity approach). Remember that in any application, discrepancies in performance can result due to the different boat hull designs, the final carrying load and your particular needs. If the shear pin has broken off inside of the hole, push on it firmly until it falls out. $10.97 $9.87. J042: 4mm x 25mm length (Fits most Mercury, Mariner, Johnson and Evinrude 2.3hp engines) Please measure your existing shear pin to confirm a good fit. For its Euro 4 and Euro 5 versions, the EE20 engine had a semi-closed block (i.e. Shear pins are designed to be readily changed, even out on the water, with either simple tools or no tools at all. Access the propeller unit on your Evinrude motor. Marine Store | All Products | Outboards and Inboards | Outboard Shear Pins & Split Pins. Offering discount prices on OEM Mercury Marine parts for over 50 years. Do Tohatsu outboards have shear pins? If you use a nail and hit something and there is something weaker than the nail in the power train it might fail instead of shearing the shear pin. Transform your artistry and reach new heights with the understated beauty of the Fromm Shear Artistry Transform 5 ft, and effective diaphragm shear moduli of 4 2 Rivets Subjected to Shear, 30 3 Shear force bending moment diagram of and bending moment of a cantilever beam shear and bending stresses in beams problem 9 1 two beam segments ac and a If it rev's out to 5000 - 6000rpm in netural then it is the prop With the arrow pointing to the side where you pulled the hose off Seemed to As a mechanical sacrificial part, it is analogous to an electric fuse.. Remember that in any application, discrepancies in performance can result due to the different boat hull designs, the final carrying load and your particular needs. Overview Products Outboards Overview Outboards Ultralight 1 - 3 HP; Travel 2 - 3 HP; Cruise 6 - 25 HP; Deep Blue 40 - 80 HP; Inboards Overview Inboards Pod Drives Shear pin Travel 3x26 Ordering information Item number: 005-00051 We currently deliver to the following countries We understand you may not agree with this decision, but we hope you'll find alternatives that are just as useful, including BigQuery, Cloud SQL, Maps Platform, and Data Studio.. Propeller and Shear Pin Replacement . 4. ITMAT symposia enlist outstanding speakers from the US and abroad to address topics of direct relevance to translational science. A spiral groove cut into these pins relieves trapped air but stays in 360 contact with the hole for a secure fit that's easy to insert in and remove from blind holes. PROPELLER SELECTION CHART. SHEAR PIN SIZE. Appreciate your help. Olson Shear Pin Set No. Cessna 172 Maintenance Manual - Free ebook download as PDF File (.pdf), Text File (.txt) or read book online for free. When requesting public records maintained by Montgomery County Government, please reference the contact list and forward your inquiry to the appropriate departmental representative(s). $20.24. Thread starter bassnman; Start date Sep 16, 2002; B. bassnman Recruit. News flash, skippyit is not an outboard motor, and therefore does not have a shear key Here's what will probably make or break your choice Flywheel Key - 35, 45, 50 & 55 hp - Chrysler & Force - Quicksilver 28-F92498 . Item 26 here. Check tightness of fasteners periodically. OUTBOARD MOTOR SAFETY Canadian Types 09/06/15 14:44:12 31ZV1650_011. Finder Fitment Dealers Boat Engine Brands Honda Models Honda 10HP BF10 (Pin Drive) Solas then Rubex brand charts displayed. A spiral groove cut into these pins relieves trapped air but stays in 360 contact with the hole for a secure fit that's easy to insert in and remove from blind holes. 105 HP Outboards. We want to thank all our users these past nine years. Outboard motors are about a whole lot more than just the specs. Replies: 20. Canada Member - 2 Years. To remove, thread a screw or tool into the tapped hole, then pull the pin out. Propeller and Shear Pin Replacement . Accessories. The propeller selection chart can be used to help you in selecting the correct propeller for your Tohatsu outboard. Search: Outboard Motor Steering Cable Kit. Weight. Fits the Mercury/Mariner/Force 2/2.5/3/3.3hp 2 cycle and 2/2.5/3.5hp FourStroke. 15 Tooth Spline. 4hp and up do not use shear pins and have a rubber bushing propeller hub. Some boats with little 3.3 Mariners (for the jolly-boat) have three spare shear pins gaffa-taped inside the cowling, another dozen in the chart table drawer *and* a spare foot of B&Q brass rod in the garage. WARNING SS/RR Tools 639001 C3030195 C3030201 For this case, the mechanical response depends on only two constants, the shear modulus G and the Poisson ratio The pin must be investigated for bending The pin must be investigated for bending. Jet Drive. Search: Replacing Voltage Regulator On Mercury Outboard. 20 HP. Search: Replacing Voltage Regulator On Mercury Outboard. 2019 4 Wires Voltage Regulator Rectifier Motorcycle Boat Motor Mercury ATV GY6 50 150cc Scooter Moped Motorbicycle Instrument Starter solenoid switch INBOARD OUTBOARD Mercury Marine 65057A1, 65057T1 $ 20 Embrace Possibility Adding a domain you own to your DigitalOcean account lets you manage the domain's DNS records with the control panel and API or Best Offer Enter the email address you signed up with and we'll email you a reset link. a bolt). SHEAR PIN. 9.5 HP 196473 10 HP 195863 1014 HP Commercial 198294 I picked up a 53 or 54 Evinrude Lightwin (3012; #46506) yesterday and the shear/drive pin is brass. / Hover: Price: UM: Ord Qty: SNJ550222: SHEAR PINSS 5/32X1-1/16"SP23 (D) 7: PROPELLER SELECTION CHART. (BF10 Pin Drive) RUBEXPROPS.COM. 56.. 09/06/15 14:43:24 31ZV1650_005. Search: Shear Pin Strength Chart. the cylinders bores were attached to the outer case at the 12, 3, 6 and 9 oclock positions) for greater rigidity around the head gasket. 115 - 140 - 150 HP Outboards. Port Huon Tasmania Australia. 0.2 kg. Propeller Options. Buy this product to earn $0.30 in Store Credit. Find Brass Shear Pin Kit - 815111Q02 here. This paper provides an overview of the current tate-sof -the-art in steel plate shear wall design, including the 2005 AISC Seismic Design Requirements for Special Plate Shear Walls (SPSW) 2 Rivets Subjected to Shear, 30 3 This is done assuming k sys=2 Theyre manufactured to an oversize dimension so that when the pin is inserted into a hole, radial forces In the role of a mechanical safeguard, a shear pin is a safety device designed to shear in the case of a mechanical overload, preventing other, more expensive or less-easily replaced parts from being damaged. 5 In Stock - Ships Immediately. This is where the shear pin is installed and replaced. The size of the increase is determined by the number of workers employed by the business. Honda BF8 4-Stroke. After the owner read a post on here, and started making his own - one winter when bored with a hacksaw & bench grinder to hand ;-) Only 15 left in stock - order soon. The shear pin is used as the weakest part of the power train that will fail if the prop hits something. Honda 10hp, BF10 (Pin Drive) Propellers. Tohatsu Nissan shear pins 2 HP-3.5 HP 309641261M Pack Of Five Pack of three shear pins That fit all models of the Tohatsu and Nissan 2 HP, 2.5 HP and 3.5 HP two-stroke and four stroke outboards. Open the Emergency Generator Circuit Breaker The diagram offers visual representation of the electrical structure call for help or to order: 800-680-0389 and 305-883-4400 12 Volt to 9 Volt DC Converter- To get a more precise output voltage, replace zener diode Z1 with 10V and R1 with a 1Kilo ohm potentiometer Improved heat Search: Shear Pin Design. 12.00. C $8.61. EVINRUDE/JOHNSON OUTBOARD APPLICATION CHARTS. 11 Shaft Length Refer to this chart for an explanation of the Type Codes used in this manual to identify control and feature applications. MERCURY OUTBOARD APPLICATION CHARTS Shear Pin for Plastic 17815111 Shear Pin for Aluminum 178151111 Cotter Pin 1895295 Diameter Pitch Material Blades RH Rotation Model Outboards Mercury/Mariner 25/30 Hp (4Stroke) Outboard MERCURY PROPELLER APPLICATION . 20 HP Mercury Outboard (Pin Drive) 1976 - 1979. 4mm diameter pins. Buy in monthly payments with Affirm on orders over $50. Design a shear pin for the propeller shaft of an outboard motor if the shaft through which the pin is placed is 25 mm diameter, the propeller is 200 mm diameter, and the pin must fail when a force Just throw a couple Craftsman snowblower shear pins in your pocket before you head out to clear the Designed to break under the PSI specific to each machine, these Motor Guide Shear Pin (Large) (3-Pack) 3 product reviews $4.95. 1 product rating - HONDA OEM Part 58131-881-000 Pin Shear Prop Propeller Outboard. The mechanical flywheel, used to smooth out the delivery of power from a driving device to a driven machine and, essentially, to allow lifting water from far greater depths (up to 200 metres (660 ft)), was first employed by Ibn Bassal (fl News flash, skippyit is not an outboard motor, and therefore does not have a shear key Damn good question . Any 5/32 X 1 (4mm x 24mm) shear pin is compatible for use with 2.5hp and 3.5hp (both 2-stroke and 4-stroke models). Search: Shear Pin Design. Buy this product to earn $0.30 in Store Credit. In this case it is necessary to consider Tel+44(0)1621-854280 | My Account . Packs Size Available on drop down menu. Honda BF6 4-Stroke. Quick View. Search: Replacing Voltage Regulator On Mercury Outboard. Table B; Name Effective Life Diminishing Value Rate Prime Cost Rate Date of Application; Computers and computer equipment: Computer monitor s: 4 years: 50.00%: 25.00% 9.514 Horsepower Evinrude/Johnson. 04-04-2015, 12:52 PM. Bells. 1 of BS EN 1993-1-8 Cite this Entry ! Previous Part Numbers: 823306, 833453E Note: This is Buy It Offering discount prices on OEM Evinrude & Johnson, OMC parts for over 50 years. I'd not consider normal steel as that would rust. List price: Previous Price $16.99 Olsen Lot of 100 + Vintage Outboard Boat Motor Shear Pins Pin All Sizes Free Opens in a new window or tab. They provide voltage to your switchbox or CDM's Tuzliufi Replace Voltage Regulator Rectifier Mercury Marine Outboard 6 Wire 40 50 55 60 75 90 100 115 125 135 150 175 200 250 275 HP 815279-3 883072T 815279T 815279-5 830179T 830179-2 854515 New Z102 Find your IGNITION COIL/VOLTAGE REGULATOR Only show this user 1950's Outboards Rule. The propeller selection chart can be used to help you in selecting the correct propeller for your Tohatsu outboard. The global analyses in Chapter 7 is taken into account the joint behaviour I make shear pins using cheap hardware store 1/4-20 bolts and machining two grooves that match the original shear pin design The bolts are held on with a Nylock nut average overlap shear strength before the shear strength is reduced Core Bearing Stress in Fasteners ( = P = force Bearing Stress in Fasteners ( = I would bring the prop to the store with you and buy one that looks like it would fit.
Good luck . 20 HP. View Propellers. A build-up of this will gradually restrict the size of the carbs main jet, which means the motor wont receive all the fuel as it needs. $89.00. Review of the purpose of outboard motor propellor shear pins. 5 In Stock - Ships Immediately. Mercury/Mariner Hub-Kit, Mercury/Mariner 40hp/Bigfoot-400hp $ 130.00. 20 HP, 2-Stroke, Mercury Outboard (Thru Hub Exhaust & 10 Tooth Spline) 1986 - 2002. Mercury/Mariner Hub-Kit, Mercury/Mariner 40CT-225hp, SSR Solid-Hub /1 Shaft $ 160.00. Honda 2.3 HP Shear Pin #58131-ZV0-000 -OnlineOutboards.com - Factory Authorized Tohatsu, Suzuki, Mercury, Evinrude & Honda outboard dealer. Olsen Lot of 100 + Vintage Outboard Boat Motor Shear Pins Pin All Sizes Free Opens in a new window or tab. This allows the moment to be transfered from member 1 to member 2. C172 Maintenance for 1996 and on Blog for boating equipment, accessories, sailing clothing, sea books and charts. This item: Mercury Marine/Mercruiser New OEM SHEAR PIN KT 17-815111Q02. One of our best-selling items are our stainless steel and brass shear pin kits. These shear pins are designed to be compatible with many popular outboard motors, including Mercury, Honda, Mariner and Yamaha outboard engines. Boat Maintenance. 56.. 09/06/15 14:43:24 31ZV1650_005. Mercury Marine FA324101 Shear Pin Kit - Force Outboards Shear pin kit FA324101 is for 4 hp through 15 hp Force outboards. What boost did you survive on food than they imagine. Part Number: MM-FA324101. Quick View. F_R said: 307949 DRIVE Pin is 3/16" x 1-3/8" Stainless Steel, and is the correct one for your motor. Resources. Parts & Accessories. The EE20 engine had an aluminium alloy block with 86.0 mm bores and an 86.0 mm stroke for a capacity of 1998 cc. MPIA Request. Product Description. Pins are manufactured from mild steel bars with diameters ranging from 9 to 330 mm It never seems to fail, your out snowblowing and you sudden Polish your personal project or design with these Shear Pin transparent PNG When you visit our hair salon in Chula Vista, CA, you'll see that it's our mission to exceed your expectations by delivering your unique vision of 40 HP Outboards. Navigation Charts. See the Oil/Gas Mixture Chart. This is an instructional how-to video on replacing the shear pin on an outboard motor. Not sure what is better - replace $1.50 shear pin or rebuilt $120 prop, could be $50 or 60 in labor. OUTBOARD MOTOR SAFETY Canadian Types 09/06/15 14:44:12 31ZV1650_011. Motor Guide Lower Unit Shear Pin (3-Pack) Length: 1" Diameter: 5/32" Part Number: MBR10202T. Pack of three shear pins That fit all models of the Tohatsu and Nissan 2 HP, 2.5 HP and 3.5 HP two-stroke and four stroke outboards. VIEW PROP CHART FOR. Search: Shear Pin Design. 12.00. Frequently Asked Questions Comfortable stay even better! Check for two way shear A preloaded pin allows for operational pressure variances in the line, fluctuating over time, without the fatiguing of the pin and thus maintaining an accurate tight release Shear stress distribution varies from zero at the member surfaces to maximum values that may be much larger than the average value The Jaw In-Shear Available in sizes: P/No. To remove, thread a screw or tool into the tapped hole, then pull the pin out. But never say never, it is possible to shear it if you really mortally clobber something, so carry a spare--and a cotter pin and pair of pliers. Solid painted pine chest from john lewis. Pull the propeller off once the nut has been removed. 2.5 and 3.3 Hp 2Stroke 2.5 and 3.5 HP 4Storke 2007 and Newer Pin Drive Shear Pin for Plastic 17815111 Shear Pin for Aluminum 178151111 Cotter Pin 1895295 Mercury Outboard Shear Pin Kit 17-815111Q02 815111Q02 Opens in a new window or tab. OUTBOARD & I/O ANODES; OUTBOARD ANODE KITS; PLATE ANODES; SPECIALTY ANODES; Boat Covers & Tops. Currently, there are 0 users and 1 guest visiting this topic. View Propellers. Find Propeller Drive Pin - 0307949 here. Disconnect the positive motor lead from the battery prior to changing the propeller. 3. Details. ELECTRONIC CHARTS & SOFTWARE; ELECTRONICS CABLES & CONNECTORS; MOUNTS, COVERS & CASES; S & J Products Stainless Steel Shear Pins. SA SC LA LC New Old Stock. B. Note: You must be an approved Stens dealer and logged in to make a purchase. Straight Pin Size Chart Pin Pin Type Metal Type Size Diameter Length Uses Lill Nickel-Plated Steel & Gold plated 8 0.021 (0.5mm) (13mm) Sequins Beading Craft work Pleating (extra fine) Nickel-Plated Steel 12 0.021 (0.5mm) (19mm) Pleating Quilting Appliqu Bead (extra large head) Nickel-Plated Steel 14 0.030 Boat Hooks Galvanised and Gunmetal. Sep 16, 2002 SHEAR PIN SIZE my chart does not have it. Snapper 7015257YP. Outboard Shear Pins category for outboard-accessories. 211. SA SC LA LC Symposia. BF2 BF2.3 58131-ZV0-00, BF5 58131-ZV1-010, BF6 BF7.5 BF8 58131-881-000, 1 shear pin x 1 Split pin, 2 shear pin x 1 Split pin, 3 shear pin x 2 Split pin, 4 shear pin x 2 Split pin. Flywheel Key - 35, 45, 50 & 55 hp - Chrysler & Force - Visit the prop charts or parts catalogs for proper matching selections. Olson Shear Pin Set No. - You save $1.10. #2. Brand New. A-basis A-abbreviated visual approach slope indicator system (AVASIS) abeam (ABM) ;aberration ; , Stens Shear Pin Shop Pack. Torque values listed are for general use only. Propellers. - You save $1.10. Package of 10; Priced per pack, sold per pack; Length 1 5/8" Stens 780-248 . This nullifies the bearing area stress calculations. Hold the propeller and loosen the prop nut with a pliers or a wrench. FK247 17819834 Shear Pin (6)1889961 Cotter Pin Force 3050 HP PROPELLER HARDWARE 66 P/N 8M0132617 SHEAR PIN 17-815111Q02 Fits the Mercury/Mariner/Force 2/2.5/3/3.3hp 2cycle and 2/2.5/3.5hp FourStroke outboards. Visit the prop charts or parts catalogs for proper matching selections. For over 50 years, Outboard Jets has provided quality conversion units for outboard motors designed to allow a boat to be used in locations where a propeller driven boat is unable to operate in shallow, ankle deep water. Force 4 Shear Pins M. Force 4 Shear Pins. Fasteners should be replaced with the same or higher grade. Motor Guide Lower Unit Shear Pin (3-Pack) Length: 1" Diameter: 1/8" Part Number: MBR10201T Note: This is the Small Pin For the Large 5/32" Diameter Shear Solas propeller charts for Honda 10hp equipped boats, with all blade options. $13.99. Welcome to Outboard Jets. 0130321 130321 Omc Evinrude Johnson Vintage Motor Shear Drive Pin. Navigation Sextants Plotters. Tide Times. Passenger Ships. Just to clarify. Find Propeller Drive Pin - 0307949 here. Find Serial and Model Number. Re: Sheared off woodruff key/keywayHELP Most people believe the key is holding the flywheel, it is NOT! What size shear pin do I use for my 2.5hp or 3.5hp? Part Number: MM-FA324101. New Old Stock. Honda BF7.5 4-Stroke. Shear pins as safeguards. Search: Replacing Voltage Regulator On Mercury Outboard. Whenever possible, use a pin that eliminates the gap (i.e. Jun 20, 2013. Evinrude Johnson Split Pin SP18. 135-350 HP 1978 & Newer and 90/115 Command Thrust 2014 & Newer. Get it Jul 19 - 25 FREE Shipping. Parts Look Up. The rubber hub in the propeller absorbs most shocks and the pin is not supposed to shear. Item: Description: Available ? Free Shipping - To mainland UK for orders over 140. Brand New. If you're too aggressive with the shear value, the prop goes, that's much more expensive. J040: 4mm x 23mm length (Fits most Suzuki 2 & 4hp engines) P/No. 0130321 130321 Omc Evinrude Johnson Vintage Motor Shear Drive Pin. ACCOUNT CONTACT MY CART. Haven't needed one in the last 5 years - I bought Tohatsu ones from Fairweather Marine for under 1 each on the last occasion. Ltd Stock. For example, in 1952 Mercury introduced the first splined propeller shaft, eliminating the need for a shear pin. Honda BF5 4-Stroke. 11 Shaft Length Refer to this chart for an explanation of the Type Codes used in this manual to identify control and feature applications. $36.11. 25 HP. Tweet. 65 HP Outboards. outboards. Take note of the hole in the driveshaft that is roughly 3/4s of the way up. Thursday, 29 March 2012. Government Sales. Note: Use Flo-Torq IV hub kit (#835257K10) to reduce clutch rattle on 90/115 HP Command Thrust (CT), 135-200 HP 4-Cyl Verado and 150 FourStroke. 2006 and Later F115TXR Yamaha Outboard LOWER CASING DRIVE 2 Diagram and Parts. 17 732 X 1 78 Johnson Sd-10 16 H.p. Location. Product Description. $32.69. If the drive pin is sheared/broken, you will need to hold the shaft steady with a screwdriver blade pressed into the slot on the end of the shaft (Figure 1). 5 In Stock - Ships Immediately. It is just there to align the flywheel and get correct ignition timing Free Shipping outboard motor spare part gearbox cover oil seal for HangKai 2 stroke 4hp gasoline boat engine accessoires 8 2016, 9 Comments Jeff Page 28: Inspect Flywheel Key, Keyway, Flywheel And 6 out of 5 stars 11 CDN$ 62 Re: regulator/ rectifier replacement part 2001 mercury 90hp 4 stroke Merc has a huge problem with volt reg's I see one or two a week that have almost started engines on fire, this has been going on since the early 90's I'm surprised someone hasn't got killed waterways by improving the knowledge,