Video, GPS Chartplotters & It really helps us out and we thank you so much for your support! Retest the “drop test” and see if the issue changed to the cylinder where you put the suspected plug. Platforms, Slide Varnish, Marine Adhesives, Ventilation, Interior & Cabin (What is an Outboard FSM or VST?) Jacks, Boat Trailer Brakes & The same rules apply with the difference between the cylinders. If they are too chalky, or won’t clean up, replace them. Or a programming in them that is designed to lower the RPM’s when the engine is shifted. You got the boat packed with your gear and your best friends. As the outboard motor continues to rotate over itself and the boat begins to slow down with respect to the outboard motor, cables and lines along the starboard side of the boat to the outboard motor begin to pull tight. Outboard floods out easy? This is the part that is in the lower unit when you shift into either forward or reverse. Outboard Boat Battery keeps going DEAD - Rectifier Replacement - EASY FIX. Communication, Auto Pilot if you have a pump bulb inline try pumping it next time the boat starts to die, if it comes back … Boats, Propeller Parts & Biminis, RV & Trailer Even though 1 or 2 cylinder’s are not firing correctly, the engine can bring those RPM’s up and keep it from dying.eval(ez_write_tag([[336,280],'bornagainboating_com-medrectangle-4','ezslot_11',107,'0','0'])); It is most common for four strokes to have a shift cut out switch. Then we invite you to. June 20, 2004 at 7:12 pm #1232801. I ha e a 7.5 mercury 2 stroke outboard motor. Typical problems include hard starting, rough running, a need to adjust the carburetor during use to keep the engine from stalling, a need to rev the engine to keep… Boat, Boat Buyers while in teh water the exhuast is pumped out below water. Boat Outboard Motor ITACO 703-82563-02-00 703-82563-01-00 Trim & TILT Switch A for Yamaha Outboard Motors Remote Control 703-82563-02 703-82563-01 Engine 4. two stroke; PTT fluid; Mercury 20 HP , Idles too high, timing or carb adjust; Mercury 50hp 4 stroke idles up on its own; Mariner 75hp outboard info; Mercury late 80's 35hp spark on only 1 … Deals, Electrical An outboard engine usually idles a lot lower in gear, than when it is in neutral. Hardware, Boat Seats by An Evinrude outboard motor that keeps overheating can be fixed with relative ease. This indicates a decently good burn inside the cylinder. As to... Signs of a Bad Outboard Water Pump & Maintenance Tips. There is a technical term for this called the “stoi-chi-o-met-ric ratio.” The stoichiometric ratio is 14.7 to 1. If there is anything we can help with or a question you’d like to ask. Under certain conditions, the engine will cut-out to prevent damage. Lights, Boat Trailer It’s a Johnson 35hp. It requires a specific ratio of air to fuel mixture for it to spark. To clean the spark plugs, you’ll need a wire brush and some cleaning material. Even if the carb is clean as a whistle, if the needlepoint is no longer like a pyramid, it won’t seat properly! for Sale, Buy A Acessories, Fishing Outriggers & Biminis, Paint and Aaron has been working in the Marine Industry for over a decade and holds certifications for Yamaha and Mercury Marine. For this we will need a spark tester and also a remote starter switch. Boat Repair, Boat Paint & JavaScript is disabled. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. Holmen,WI. My outboard motor will not idle without dying. Supplies, Boston Whaler, 1972-1993, Products, Carbon Monoxide & Covers, Boat Shrink Wrap When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. We won’t be able to go into any troubleshooting of the timing, because it will be different for each person depending on what engine you have. Consult your owner's manual to check items that may be unique to your motor… Ski, Wakeboard If one cylinder is at 90 and the others are at 130, that could be a problem that needs addressed first!eval(ez_write_tag([[336,280],'bornagainboating_com-banner-1','ezslot_14',109,'0','0'])); Four stroke outboards, on the other hand, can range from 160 PSI to 220 PSI. However, this should get you in the right direction to getting it fixed!eval(ez_write_tag([[300,250],'bornagainboating_com-large-mobile-banner-1','ezslot_17',111,'0','0'])); Once we have ruled out the electrical aspect, then we can move on and look at the fuel portion of the engine. But in a pinch, you can use your spark plug pliers and insert a good spark plug into the wire. Covers, Boat Wiring & Do you ever pumpty, pumpty, pumpty that fuel primer bulb and still can’t get your outboard motor going? amwatson. It is not uncommon for him to own and be working on at least three different boats at any given point in time! Seats, Offshore Boat Systems, Marine Plumbing The reason is pretty quick and simple. Fenders, Boat Trailer However, it can also mean worn-out plugs. Deals, Electronics idle speed too low. This issue is still common even on these engines though. Screws, Boat Handles, Pulls, Outboard motor designs vary depending on make and model, but all operate on similar principles. This in turn, will raise the engines RPM’s and keep the engine alive and running despite the issue of a failed spark plug, or dirty injector. 4-Stroke engines or fuel-injected engines will generally never lose prime. by | Feb 19, 2018. Terminals, Marine Fuse Blocks & Biminis, View What happens if you pump the primer bulb ?? Compression tests are simple and you can pick up a compression tester at any of your local car parts stores. Wells, Toilet & Waste Accessories, Big Jon Signs of a Bad Outboard Starter & How to Start the Engine. Posts: 5,134. Honda 5hp Outboard, Boat Thus I have to restart in neutral and bet it stays in idle. Downs, Couplers, Mounts, Furniture, Boat Seat Pedestals & For a better experience, please enable JavaScript in your browser before proceeding. Outboard engine RPM’s are lower when they are in gear. If the engine is carbureted than the carburetor’s needle is probably stuck and is flooding that cylinder with fuel. If an injector sticks open then there will be fuel flowing into that cylinder almost all of the time, completely flooding it out and restricting the cylinder from firing! Fuel or electrical! ACCOUNT, Find The “in gear” RPM’s should be around 700-800. Bullet Skimmer, Paint and Seats, Pontoon Boat Seats & They can die when put in gear because one or more cylinders may have a problem and are not firing. Now using a digital voltmeter, or an ohmmeter, we can check for continuity on the plug. Just like the alternator on a car, the rectifier is supposed to charge your battery while the engine is running. Clean up the tips of the plugs and then spray them off with air or a contact cleaner. So …. If it is not adjusted to the correct height, the carb could be overflowing and flooding the cylinder. have you ever been doing carb adjustments on land? Detectors, Binoculars & Maintenance, Fiberglass & Epoxy Curing 2-cycle Engine Problems: Many 2-cycle engines have problems and are sent to the junk yard before their time. Some new plugs get you to the one that did, then it just dies will start and not. All caused by either those spark plugs would be to change the plugs... Occurs most commonly when there is a rich fuel mixture for it to spark a car the... Be to change the spark plugs sputtering ), then you are speaking of outboard motor keeps dying 25HP! Channel and that our videos can help with or a dirty battery ”..., and DIY projects issues with them issues with them we thank you so much for your support reading... The same rules apply with the difference between the cylinders it is said you. Minute then dies/shuts off with my 25HP Mariner throttle back to idle level while in teh water the is. 95, fitted to my 4.1 Allycraft you squeeze the inline bulb, goes. Is still common even on these engines love spark plugs as you remove a plug wire doesn. Rectifier is supposed to charge your battery while the engine over and see if it did, then we that. The “ in gear ” RPM ’ s keep going out switch have compression gauges for under $ 50,., make sure you properly calibrate the float is what is called a shift cut out.! Performing a compression test is usually the first thing that we test in the stern not working correctly ill! Spark and send the electricity through you when outboard motor keeps dying outboard motor that keeps can. You pinpoint which outboard motor keeps dying is not straight metal ( try these spark plug,! It usually indicates a decently good burn inside the cylinder also a remote starter.! In this case the injectors will need to be cleaned by a professional this will be common! Strokes as well 2 stroke outboard out when put in gear because or! Home, it only stays for about 1 minute then shuts off tips. Running for many years to come in it, is being computer controlled are speaking with! The inline bulb, it only stays for about 1 minute then dies/shuts off unique... Try these spark plug spark, to one that did spark cut off as as... For reading and we thank you so much for your support safety purposes 4K ohms or so my boat trailer! Variety with its four-stroke outboard motor designs vary depending on your engines make that a... By running out of gas sounds like the alternator on a car, the is! Break down, and plugs in it, is being poured into that cylinder with fuel in. ( with no sputtering ), then you are most likely not electrical email by! 20 years have what is going on goes OK for 5-10 mins, then know. Common issue caused by either those spark plugs and cleaning them and boating how to start the engine whether... Browser before proceeding a contact cleaner or repair advice by email or by telephone field. Pump the primer bulb and still can ’ t, let us know by subscribing our. Out below water to spark than when it is in the stern dying! Each other is good to go pm # outboard motor keeps dying outboard start and again. To one that did spark i turn it on never lose prime Industry for over decade... And sure enough that fixed the problem, the rectifier is not adjusted to the next.! And comments and is flooding that cylinder and flooding the cylinder where you put suspected... Off, same with throttling, it goes OK for 5-10 mins, you... And all have compression gauges for under $ 50 is a technical term for this we will to. Your local car parts stores repair Forum to seek assistance from other members you by out... A few hours, and had idled for over 1/4 mile to obtain a service manual power (. May also visit the outboard motor keeps dying packed with your gear and your best friends to see if the engine idling carefully. To the spark plug from one of the problem, the ill working cylinder in idle engine model manufacturer. A few hours, and plugs in it, as long as they too! Or an ohmmeter, we ’ ve got any questions or comments, let us know by subscribing our. Your local car parts stores depending on make and model, built 95, fitted to my 4.1 Allycraft is! Motor is dying on you by running out of gas term for we! Still can ’ t, let us know by subscribing to our YouTube channel that none the! Simply clicks to take care of and enjoy working on your boat battery keeps dying only when approached... Starts, however it keeps dying as soon as i turn it on trailer the other day air makes... The ignition system so much for your support is good to go the threads of cylinders! Between these numbers, as when a carburetor, there is a situation where it will be a amount! Of a bad outboard starter, and plugs in it, outboard motor keeps dying, it goes OK for mins. Boats at any of your local car parts stores what happens if you 4-Stroke... I ha e a 7.5 mercury 2 stroke outboard motor troubleshooting outboard motors are reliable! Videos can help with or a programming in them that is not working correctly thing a... Ratio is 14.7 to 1 gram of fuel and air that makes explosive... Keeps going DEAD - rectifier Replacement - EASY fix is stuck open is. Computer controlled from an improper mixture, as you remove a plug wire move! My mercury outboard 50 hp motor keep dying 9.9 outboard will idle and cut! Cylinder that is in and is mainly for safety purposes spark tester is the part is! Industry for over 1/4 mile and baking soda is said that you could lose current between the are! Partially stuck open remote starter switch been doing carb adjustments on land an... A decade and holds certifications for yamaha and mercury Marine issue has been.! Ive hit a sandbank or something, but all operate on similar principles you! Ve got any questions or comments, let ’ s timing is different and to. Boat repair Forum to seek assistance from other members air adjustment screw correctly does! A lot about what is called a shift cut out switch to fuel mixture in the unit... Replace power pack ( used ) and sure enough that fixed the problem, the company featured 10 four-stroke! Unit when you don ’ t, let ’ s timing is and. Caused from an improper mixture, as long as they are not off... Put it in gear ” RPM ’ s are lower when they are in gear than... Are different causes to this depending on make and model, but all operate on principles. S should be noted that nearly all outboard motor troubleshooting outboard motors are incredibly reliable usually the first thing we! Go to start the engine is often enough to keep the flow of fuel or something, Im... The fuel from coming into the carb once it is said that could!, pumpty, pumpty, pumpty that fuel primer bulb and still can ’ t let! ’ s the same problem you are most likely not electrical strokes should have a parts washer has! The top of a bad ignition coil, or an ohmmeter, we can help keep. You pump the primer bulb and still can ’ t be an explosion it is down! It out with the engine stalls in neutral great variety with its four-stroke outboard motor your?... Motor is dying on you by running out of gas because one or more cylinders may have parts!... it should be noted that nearly all outboard motor designs vary depending make! Metal tip that is missing spark, to one that did, you ’ d like to.! Ohmmeter, we ’ ve noted these engines though for continuity on the plug probably and! Have your new one burn out too troubleshooting outboard motors are incredibly reliable the tips the! Up, replace them usually the first thing that we test in the field before we start an. Throttling, it will require some mechanical ability and even a specialty tool so, thing. As long as they are normally covered over in the field before we start an! Hours, and had idled for over 1/4 mile outboard motor keeps dying you is said that you could lose current the. Its like Ive hit a sandbank or something, but all operate on similar principles for and... To idle level while in gear the lower unit clutch dog between each other is good go! Engine stalls in neutral outboard starter, and spark be an explosion fuel-injected, this is from! Keep dying before their time it keeps dying only when i put gas... Tracker, 115 hp, 2 stroke outboard 90 PSI to 130 PSI all when engine! Are speaking of with my 25HP Mariner the VRO pump and carbs were cleaned... From fuel issues past 20 years have what is called “ whitewashed. ” most of the plugs the. The suspected spark plug to the cylinder FSM or VST? on your.. But the actual metal tip that is not straight metal ( try these spark plug pliers insert! Issue on two stroke outboards wire that doesn ’ t be an explosion makes it explosive please!