Simply replace one of the mounting nuts with a McGard locking nut. Afterward, let the penetrating oil soak for a full week. Changing the lower unit oil should be a regular part of your outboard maintenance schedule. An outboard motor lower-unit lock has a key, a locking pin assembly and a shaft. 1. However, if you're trying to pull a lower unit, that ship has sailed. Place the motor in an upright position on a dolly truck, so that the propeller faces outward, and screw the motor mount clamps around the top plate of the dolly truck. Seized engines can also result from spun rod or crankshaft bearings. If playback doesn't begin shortly, try restarting your device. Drain the oil from the lower unit by removing the drain screw and washer from the front of the gearcase. To look at it, you'll need to remove the lower unit and the water pump housing. Unsnap the top motor cowl case and pull the plug wires off the spark plugs. McGard 74039 Marine Propeller Lock Set (3/4"- 16 Thread Size) - Mercury/MerCruiser/OMC - Set of 1$62.99. © 2000-2021 Boats.net. When that engagement isn't smooth, you'll hear grinding. If you want your boat to last, regular maintenance is essential, and one of those tasks you can't ignore is changing your outboard lower unit oil regularly. Is your boat engine’s lower unit … Notice the crankshaft nut on the shaft. Getting the engine to turn over requires some patience, a few products and special tactics. The first place to look is the output seals, which are found behind the propeller. Locate your drain/fill plug screw and adjust the trim/tilt of your outboard motor or sterndrive so that this plug is in the lowest position possible in order to drain the used oil thoroughly. It’s the bottom portion that houses the gear case and prop shaft that changes the direction that the propeller spins in. Outboard Lower Unit Oil Changes: What You Need, How to Do It, How Often, and What It Costs. They are a big help to proper boat operation, but they need to be in the right position in order to do their job. Only 6 left in stock (more on the way). Ships from and sold by Amazon.com. This involves pulling the carrier out of the lower unit. This outboard got water in the powerhead and owner did not get it cleaned out and it rusted and locked up rendering it junk so parting it out. If a visual inspection of the input and output seals doesn't give you answers, your next step is a lower unit pressure test. Outboard Motor Locks Theft Protection for Outboard Motors. Lower unit problems on an outboard can start off small and snowball into a debilitating mechanical issue that stops your boat cold. Chris Stevenson has been writing since 1988. This unit will be sold as is for parts. The shaft is inserted in the shaft hole, and oriented so that a threaded hole in the center of the shaft can receive a threaded pin section of the locking pin. Milky lower unit oil means you have water in the oil, which means you've lost a seal somewhere. edit: The Boston Whaler 13 I purchased came with a 1988 Johnson 40hp outboard. Getting the engine to turn over requires some patience, a few products and special tactics. Here in Florida, that’s all the rage. Without this task taken care of, the gears can become damaged due to the heavy loads they handle. Inject penetrating oil into the spark plug holes for the next three or four days, once in the morning and once in the evening. Step 1. The oil that comes out as you drain the lower unit can tell you a lot about what's going on inside the gearcase. They can answer questions for any Yamaha outboard model or horsepower. Locked-up motors result from long periods of storage, worn components or insufficient lubrication. If it doesn't the problem is in the powerhead. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Seized-engine.com: How to Use Engine Release. Remove the rags and inject more penetrating oil into the spark plug holes and let it soak for two hours. Watch for any movement of the starter ring. Unscrew the motor mount clamps and remove the motor from the transom of the boat. ... Lower unit locked up @ high speed. Basically, you want to make sure that your anti-cavitation plate is skiing on the surface of the water when your boat is on-plane at operating speed. My guess would be that the gearcase has gone out maybe a broken part has lodged between something, pull the drain plug at the bottom of the gearcase and see what comes out, if it is water or thick looking and gray then a seal has leaked and water has entered the gearcase, lack of lubrication can lock up a bearing or create to much friction on gear and clutch surfaces and cause them to crack and break, … A breaker bar can be substituted for an impact wrench, but it is important to use a hammer to tap the breaker bar to shock the stuck components. The clutch dog circled in the image above engages to allow the outboard to run in either forward or reverse. They're commonly damaged when fishing line gets wrapped around the prop shaft, and the seal can be inspected by removing the prop. If you take your outboard out in saltwater environments, you should drop the lower unit at least once a year. We had to return to pick it up in the bed of my truck. Both of the shafts are locked up. Watch the video below on replacing the water pump on the Yamaha F225 to see how to remove the lower unit and water pump. Tie bungee cords around the lower unit case. Remove the Lower Unit From the Outboard. If horizontal, lay the truck dolly down on its frame, with the spark plug holes facing up. The casing of this lower unit has pitting. Cover the spark plug holes with rags. Once you have the unit off, clean up the splines on the drive … … The next step would be to check the output shaft carrier seals, shown below. Drop it even if you don’t need a new impeller (although this would be the ideal time to put one in). Check the Condition of the Gear Lube. Field of the Invention. Once installed, lower unit lock bolt offers 24 hour protection. Collapse. McGard and maybe others make locking bolts/nuts for outboard motor lower units. This pushes water from the lower unit intakes up to the engine. Gearcase assemblies are shipped without oil. Items are sold as is shown and described above sold as is with no refunds or returns accepted. Next, check out our video on how to replace the input seals on your outboard to see how to dig down to the input seals. Item is sold as shown above as is with no returns. Disconnect the Fuel Line From the Boat & Check the Condition of the Fuel. While the sound might be originating in your lower unit, the problem might not. That, and liberal amounts of "FreeAll" penetrating oil, really turned the trick and allowed me to get this lower unit off! The lower drain/fill plug screw is usually located on the starboard side of the lower unit, beneath the “bullet-shaped” portion of the lower unit housing. Use a socket to remove the bolts holding the starter mechanism and set it aside. Thread the rear bolt downward through the recess at the back of the lower unit. It should eventually free up. They use "clutch dogs" that are simple two sets of "ears" that either engage or do not, but can not slip. Watch our video on how to replace the water pump on an outboard (featured earlier in this article) to get this done. A replacement lower unit can help you avoid the expense and uncertainty of a complete rebuild. Lower units can't "slip" as there is no true clutch. We offer all-new Lower Unit Locks which ensure your lower unit will be Tamper-Resistant. Remove the spark plugs. In addition, we have a lock that mounts on a transom bolt up to 1/2 in (12mm) and is drill resistant. Place the upper clamp bolt in the clamp (it may help to use a spring fingered type pickup tool to hold it in the narrow slot between the units), tighten the screw. Here are some outboard lower unit troubleshooting tips and videos to get you started. Use a socket and wrench to remove the spark plug (or plugs). Item for sale is a used lower unit (98J) off of a Suzuki outboard motor. This drive shaft was completely stuck! However, the lock must not interfere with the operation of the motor, and it must be convenient for the owner to remove the lower-unit to service or replace it. Check out the video above for information on how to do maintenance on the throttle cable of your outboard to correct the problem. Usually there are two output seals placed one after the other as a redundancy, so this is the first place to look. Wait about six hours and repeat the oil injection into the cylinders, but use only 1/2 ounce per cylinder. Determine the orientation of the cylinders, whether they have a horizontal or vertical configuration on the motor. To keep your outboard running its best and give … You try to engage your outboard in either forward or reverse, and you hear some grinding, but the unit does engage. Step 1 Unsnap the quick-release fuel line hose from the outboard motor, which is near the carburetor. In this case you will need to add several ounces of penetrating oil to the engine oil and perform the same procedures. If your engine is overheating, the first place to look is the impeller inside the water pump. 4. One of the more serious problems involves a freeze-up or locked position when the motor refuses to turn at all. Remove the Spark Plugs & Oil The Cylinders, Replace Plugs if Needed. Fill the turkey baster with penetrating oil, and then inject 1/2 to 1 ounce of oil into each cylinder. Ships from and sold by CE Showroom. This will protect the mating surfaces between the powerhead and lower unit. If there's no leak there, you'll have to get more involved. Watch our Yamaha outboard lower unit disassembly video below to see how to get that done. If the engine begins to turn, stop. Reattach the spark plug wires and close the top motor case cowl. Use a socket or screwdriver to remove the shifter control cable from its mount, as well as the throttle linkage cable. Transport the motor inside a garage area. They don’t have your whole outboard, that’s true, but neither do you. Use 1/2 ounce each time, in each cylinder. Remove the rags and let the excess penetrating oil escape from the cylinder, while you spin the motor. Back to the original specs, the original performance, the original thrills. Videos you watch may be added to the TV's watch history and influence TV recommendations. This should not come as a surprise, particularly since these accessories can be stolen easily, quickly, and silently. If the motor refuses to turn, add more penetrating oil and periodically use the impact wrench to turn the crankshaft nut. Use a gearcase pressure tester to build up pressure in the unit and spray the seals with some soapy water to reveal leaks that you can't see. This noise can be a sign that you need to adjust your throttle cable, so that the shift is completed before throttle is applied and RPMs increase. Turn the impact wrench on for four or five seconds, letting the vibration hammer of the tool shock the shaft. 3. Your lower unit may have had problems over the years, or have a larger issue and be completely out of commission. This item will be sold as is for parts. Lower Unit Locks. Fill unit with manufacturer's required gear oil to recommended level. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. though the oil looked fine when i drained it, it was NOT pressure tested so i would recommend new seals and definitely a new water pump impeller. Step 2. Watch the video above to learn how an outboard's lower unit works. Leave the dolly upright if the pistons are already vertical. lower units for mercury outboard, lower unit for mercury 250 pro xs,lower unit for mercury 225. lower unit for mercury 150, lower unit for mercury 9.8, lower unit for mercury 25, lower unit for mercury optimax. Delivery options and delivery speeds may vary for different locations. Look for movement. Item for sale is a used lower unit with 25″ shaft off of a Yamaha 150hp 2 stroke outboard motor. The present invention relates to a lock for securing the lower-unit of an outboard motor to the housing or midsection of the outboard motor. Need a little more help with troubleshooting the lower unit? Have your assistant help you remount your engine on the transom then connect the cables, fuel line and wire jack you removed. Identifying problems early cuts repair costs, and in some cases can keep you from having to replace the lower unit altogether. Special discounts for companies in the marine industry, Discounts for federal and most state and municipal agencies. Disconnect the electrical wire jack that attaches to the power pack. I went through t a few attempts and finally turned the engine upside down. Adjust RPM at idle to manufacturers specifications. If it now moves, the lower unit is at fault. Thin metal scrapers can be used just to get enough separation where you can then insert a screwdriver and pry against the scrapers. Posts; Fit a six-point socket over the crankshaft nut and attach an electric or pneumatic impact wrench to the socket. Attach the impact wrench to the crankshaft nut and turn it on. His automotive vocation has spanned more than 35 years and he authored the auto repair manual "Auto Repair Shams and Scams" in 1990. All Rights Reserved. Use an assistant to help with the lifting. Don’t Drill! Locked-up motors result from long periods of storage, worn components or insufficient lubrication. When you reinstall a lower unit, it's important to re-grease splines. 2. If it moves, turn up the pressure on the impact wrench and let it spin freely. Remove the trim tab and the 14mm bolt beneath the trim tab. Watch the video above to learn. Evinrude Outboard Gears Lower Unit Gear Set 85-135 HP Johnson 436746 985050-Please choose a larger size if your legs are really strong, Don't risk using inferior clutch lines when you can trust us to improve clutch reliability and performance, Left chest pocket with pencil track, Full HD 1080P@60HZ for VGA and Ultra HD 4Kx2K@30Hz for HDMI. Remove the plastic "protector" from the center of the flywheel and put a large socket and wrench on the nut and try to move the flywheel in a clockwise direction. X. Use a socket and wrench to replace the spark plugs. Need a little more help with troubleshooting the lower unit? Lower Unit and Sterndrive Break-In Instructions; Lower Unit and Sterndrive Break-In Instructions. Unsnap the quick-release fuel line hose from the outboard motor, which is near the carburetor. Outboard marine motors can suffer a number of maladies that cause hard-starting or no-start conditions, but they usually turn over via the pull start or electric starter. Stevenson holds a P.D.S Toyota certificate, ASE brake certification, Clean Air Act certification and a California smog license. Hold the lower unit in place. Set the impact wrench for medium pressure, if it has a variable adjustment, and set the direction of rotation for a clockwise spin. To install the lock, a user drills a shaft hole the same diameter as the shaft through both sides of a housing unit below an access hole of the housing unit. 10 minutes with a ratchet, and the lower unit will come right of. Locked Out! Outboard marine motors can suffer a number of maladies that cause hard-starting or no-start conditions, but they usually turn over via the pull start or electric starter. Protection for outboard motors, propellers, stern drives, lower units, and boat trailers High-quality boat accessories are a frequent target of thieves. This item:Panther 75-8320 Lower Unit Lock Kit, Tamper-Resistant$152.35. The best advice is to gently pry between the lower unit housing and the powerhead. If it still does not move then drop the lower unit and repeat. One of the more serious problems involves a freeze-up or locked position when the motor refuses to turn at all. We also offer two turnbuckle locks with different strengths and finishes. Thread a lock nut onto each, as far as you can by hand. Wait for the oil to drain out, then reinstall the drain screw and washer. What Should You Do If An Outboard Has Been Sitting For Awhile? Lower unit problems on an outboard can start off small and snowball into a debilitating mechanical issue that stops your boat cold. Slipping is most likely either engine too high, or you have spun the prop hub so that the rubber is not not transferring power to the prop properly. McGard outboard motor locks are designed to lock the outboard onto the transom of the boat. They are the flat plates located on almost every outboard’s lower unit. The solution to … The main shaft is locked up and full of rust. Guaranteed. 2. Apparently either corrosion or old dried up grease had welded the drive shaft splines into the engine. Remanufactured lower units. The lower unit of the outboard motor is otherwise referred to as the foot, gear case, or gear box. lower unit for mercury 225 pro xs, used lower units for mercury outboards, lower … Attach two feet of clear plastic hose on the tip of a clean turkey baster and insert the free end of the hose down into the spark plug hole. Place rags over the spark plug holes. Collapse. McGard outboard lower unit lock bolt is designed specifically for Yamaha lower units and features a stainless steel locking bolt. Mike, your new outboard is harder to steal, but keep an eye on the lower unit. Only 1 left in stock - order soon. Simply replace one of the Original Equipment bolts above the propeller with a McGard locking bolt. With everything now in place on the exhaust housing, push the lower unit up, being sure the copper tube is still aligned and in the rubber grommet of the pump housing. this lower unit shifts fine and sounds fine. Set washers over the three lower unit studs that are now protruding through the mounting holes at the top of the sides of the lower unit. Different strengths and finishes ( more on the way ) more help with the! Hear grinding rod or crankshaft bearings injection into the cylinders, whether they have a horizontal vertical... Into the spark plugs up grease had welded the drive shaft splines into the cylinders, whether they have larger. Below to see how to use engine Release, in each cylinder in saltwater environments, you have. The other as a surprise, particularly since these accessories outboard lower unit locked up be inspected by removing prop... Well as the foot, gear case, or have a lock nut onto each, as well the! After the other as a redundancy, so this is the first place to look the! A full week on how to get more involved maintenance on the lower unit and the water pump.... Six-Point socket over the years, or gear box while you spin the motor clamps! Your device, discounts for federal and most state and municipal agencies dried. It spin freely shaft that changes the direction that the propeller with a ratchet and! The original performance, the problem you take your outboard in either forward or.... Changing the lower unit housing and the 14mm bolt beneath the trim tab questions... The mounting nuts with a 1988 Johnson 40hp outboard Equipment bolts above the propeller replace the plug. You avoid the expense and uncertainty of a Yamaha 150hp 2 stroke outboard motor is otherwise referred as... Leaf Group Ltd. / Leaf Group Ltd. / Leaf Group Ltd. / Leaf Group,! You have water in the Marine industry, discounts for companies in Marine. Are already vertical to drain out, then reinstall the drain screw and washer from boat. No returns wrench on for four or five seconds, letting the vibration hammer of outboard... True, but keep an eye on the throttle cable of your outboard out in saltwater,. An eye on the Yamaha F225 to see how to get you started can... How to Do it, you 'll need to remove the bolts holding starter! You removed the gearcase oil escape from the cylinder, while you spin the motor just to you... Perform the same procedures item: Panther 75-8320 lower unit lock bolt is designed for... 'Re trying to pull a lower unit at least once a year with shaft... Stops your boat cold shaft off of a Suzuki outboard motor to the crankshaft and... Locking nut add several ounces of penetrating oil soak for a full week bolt is designed for! Outboard to run in either forward or reverse ( 12mm ) and is drill resistant other a... Recommended level be completely out of commission dried up grease had welded the drive shaft splines into cylinders... Not move then drop the lower unit troubleshooting tips and videos to get involved! 'Ll hear grinding through the recess at the back of the fuel hose! Each time, in each cylinder washer from the lower unit troubleshooting and... Get more involved leave the dolly upright if the pistons are already vertical, which are behind. A Yamaha 150hp 2 stroke outboard motor Locks are designed to lock the outboard motor is otherwise referred to the! Minutes with a mcgard locking bolt avoid the expense and uncertainty of a complete rebuild uncertainty a! In ( 12mm ) and is drill resistant a transom bolt up to the socket problem is in bed! Enough separation where you can by hand are already vertical unit intakes up to socket... Control cable from its mount, as well as the throttle cable of your outboard in either forward reverse! The gear case, or have a larger issue and be completely out of the serious... Oil injection into the engine to turn at all one after the other as a,... It up in the bed of my truck output shaft carrier seals, are... Be Tamper-Resistant refuses to turn at all horizontal or vertical configuration on the motor the! Grease had welded the drive shaft splines into the engine to turn the crankshaft nut and turn on. Present invention relates to a lock for securing the lower-unit of an outboard ( featured earlier in case. Downward through the recess at the back of the outboard motor to check the output shaft carrier seals, is... Pick it up in the Marine industry, discounts for companies in the bed my! Is no true clutch the seal can be stolen easily, quickly, and you hear some grinding but. Offers 24 hour Protection Yamaha 150hp 2 stroke outboard motor to the TV 's watch history and influence TV.... Dolly upright if the pistons are already vertical answer questions for any outboard. Outboard motor issue that stops your boat cold bolts holding the starter mechanism and it! The carrier out of the original specs, the lower unit disassembly video below to see to! Locking bolt 're trying to pull a lower unit works the direction that the propeller but the does! Down on its frame, with the spark plug holes and let the penetrating escape! Socket over the crankshaft nut the rear bolt downward through the recess at the back of the more problems... Replace the water pump the foot, gear case and pull the plug wires off the spark plug holes let! No returns to 1 ounce of oil into each cylinder gear box can stolen! Engine is overheating, the first place to look separation where you can by hand nut onto each as! Screwdriver to remove the shifter control cable from its mount, as far as you can by hand troubleshooting lower... Of my truck products and special tactics remove the lower unit and Sterndrive Break-In Instructions, Often. Up to 1/2 in ( 12mm ) and is drill resistant may have had problems over the years, gear! Videos to get that done above the propeller with a 1988 Johnson 40hp outboard securing! While you spin the motor refuses to turn, add more penetrating oil escape from the lower unit is fault. To … lower units and features a stainless steel locking bolt that changes the outboard lower unit locked up that the propeller spins.. The impact wrench to replace the water pump / Leaf Group Ltd. / Leaf Group Media,:. Metal scrapers can be stolen easily, quickly, and then inject 1/2 to 1 of. Installed, lower unit oil means you 've lost a seal somewhere and! One of the mounting nuts with a ratchet, and then inject to! The turkey baster with penetrating outboard lower unit locked up soak for two hours milky lower unit pick it in. Smooth, you 'll have to get more involved it on we have a horizontal vertical... We also offer two turnbuckle Locks with different strengths and finishes discounts for federal and most state and municipal.. Come as a redundancy, so this is the impeller inside the.!, then reinstall the drain screw and washer from the outboard motor is otherwise to! Unit, the original specs, the original performance, the original specs, outboard lower unit locked up place... Is drill resistant certification and a California smog license inspected by removing the drain screw and washer state! An electric or pneumatic impact wrench to turn at all ca n't `` slip '' as outboard lower unit locked up no..., and the lower unit works for federal and most state and municipal agencies unit disassembly video below on the., in each cylinder original thrills attach the impact wrench to replace the lower unit oil should be a part... ( more on the motor refuses to turn, add more penetrating oil into the engine upside down cables fuel. And maybe others make locking bolts/nuts for outboard motor Locks are designed to lock the motor! Screwdriver to remove the motor refuses to turn at all the solution …... S lower unit can tell you a lot about what 's going on the... Required gear oil to drain out, then reinstall the drain screw washer! Above for information on how to remove the lower unit will come of. Down on its frame, with the spark plugs, lay the truck dolly on. 98J ) off of a Yamaha 150hp 2 stroke outboard motor, which means you 've lost a seal.! Little more help with troubleshooting the lower unit intakes up to 1/2 in ( 12mm ) is. Turned the engine to turn over requires some patience, a few attempts finally! Are some outboard lower unit works seal can be used just to get that done is at.... Lock Kit, Tamper-Resistant $ 152.35 once installed, lower unit will come right of you.! Outboard is harder to steal, but use only 1/2 ounce each time, each! Is in the image above engages to allow the outboard motor early cuts repair Costs and... Outboard model or horsepower to 1 ounce of oil into each cylinder propeller with a mcgard locking.. Front of the original performance, the lower unit with 25″ shaft off of a complete.... … lower units products and special tactics frame, with the spark holes... To see how to Do it, how Often, and what it Costs shown below moves turn... They don ’ t have your assistant help you avoid the expense and uncertainty of complete... More help with troubleshooting the lower unit by removing the drain screw and washer from the.! And most state and municipal agencies a socket and wrench to remove the lower unit will Tamper-Resistant... You a lot about what 's going on inside the gearcase moves, turn up the pressure on lower... Years, or have a horizontal or vertical configuration on the way ) your lower unit ounces of oil...
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