Updated: October 30, 2019. Step By Step! It really helps us out and we thank you so much for your support! All rights reserved. The ignition key may be faulty. Cheap fuel lines, hose clamps, and connectors commonly cause problems with your outboard engine. Between the pickup tube that is in the fuel tank, to the engine lift pump. These will leave some of us sitting at the dock, wishing instead of fishing. How To Pressure Test A Gear Case! Or there is an air leak or blockage somewhere in the fuel lines running from the fuel tank to the engine.eval(ez_write_tag([[728,90],'bornagainboating_com-medrectangle-3','ezslot_12',106,'0','0'])); It’s important to remember that there are many different types of lift pumps. Water separators get dirty and can create a bad restriction in the fuel system. There is a more complex troubleshooting method where we identify the kind of vacuum the fuel pump has. This Is What A Break In Period For A Brand New Engine Is! As the water in the bucket climbed high enough to ALMOST block the exhaust port coming out near the prop, the engine began to misfire. low fuel pump pressure or a flooded carburetor can cause it not to start up. Nowadays, most manufacturers use shut-off valves on the water separators and have the lines above the top of the tank. Fortunately, the other style of pumps are mechanical fuel pumps. How Fuel Supply Modules & Vapor Separator Tanks Operate! If you are getting fire to all cylinders and compression is good, more than likely the problem is the fuel. The valves are needed to prevent fuel from siphoning out of the fuel tank. Miss January and February: Brittany P. Water Sports. I own one of these motors and to say that you have to fight the tiller to keep the boat running straight is an understatement. Your motor could be losing power due to this issue as well.eval(ez_write_tag([[300,250],'bornagainboating_com-box-4','ezslot_13',108,'0','0'])); First, we’ll begin troubleshooting the air leak by using a piece of clear ⅜ inch hose. Today's outboard motors are far more reliable and fuel efficient than those of yester-year, but you'll still want to know how to fix these common problems—and fix 'em fast. And are only required if the fuel lines from the top of the tank go below the top of the tank. For those of us who know the quick fix solution, however, these problems are easy to take care of. Hi, I have a 2002 3.5B2 3.5HP 2cycle that I purchased used last year. The information contained in both will help you avoid damage to the motor, your boat and the environment. Top 10 Common Boat Engine Problems. And then listening to hear if the pump turns on and activates. If your outboard has an external gas tank, there can be a number of problems between it and the motor. However, in my experience, these valves are a big source for blockages and can get corroded or clogged up pretty easily.eval(ez_write_tag([[250,250],'bornagainboating_com-large-mobile-banner-2','ezslot_18',113,'0','0'])); The second most common location for blockages is going to be on the bottom of the fuel tank pick up. Have a properly operating lift pump. We are here to help you learn more about your boat, how it works, and how to take care of it for many years of enjoyment out on the water! From BoatUS Magazine, America's Most-Trusted Boating Magazine. Modern outboard engines have come a long way, whether you’re talking about the now-common four-stroke or modern DFI motors. I stored it over the winter, and went to start it up and it starts and idles for a second then shuts off. Start by checking the hydraulic fluid reservoir level. At this point in troubleshooting though. The fuel tank pickup itself could also be corroded, or even broken.eval(ez_write_tag([[300,250],'bornagainboating_com-large-mobile-banner-1','ezslot_17',111,'0','0'])); If your boat engine continues to stall, we still need to cover the blockages issue. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Zenon Bilas Inducted Into Ukrainian Sports Hall of Fame. This abnormal movement may indicate a bent, broken or altered propeller. Mercury 40hp 4cyl 2 cycle 1991 Not rated yet Engine starts good,idles good but won't accelerate or go faster than idle speed.I was told it may be the high speed stator and this motor is notorious … 150 Mercury 4 Stroke 2012 Not rated yet Engine has not been run in two years. Once the fuel passes through the water separator, it then comes out the other side into a primer bulb or straight to the engine. Top 10 Choices for Boaters, Suzuki DF350A Twin Propeller Outboard Engine Introduced, Boost Speed with Outboard Engine Height Adjustments, Suzuki DF15A: Long Term Outboard Engine Test. Boat Engine Stalls When Accelerating. Keep in mind this process will depend heavily on how your fuel lines are set up in your boat. Latest. Either the engine’s lift pump has failed, the boat is out of fuel. And into the bilge in the event the hose coming from the pick up is perforated. each. This generates a hole in the bottom of it & leaks fuel into the bilge. Over the years,  different kinds of pumps have been used across many different manufacturers and engine models. Engine not primed -- pump primer system 8. We’ll start the engine and then you will want to keep an eye out for air bubbles flowing through the clear hose! Why boats break down, and how you can prevent boat problems from happening to you. I am sorry to hear about your troubles with your outboard. In the event where the water separator or bracket isn’t the issue. Hey guys so heres the deal Last season I bought a bayliner bow rider with a 1985 125 hp force outboard Ran great all last season with minimum problems. Or there is a running issue, where the engine is not getting wide-open throttle and spits and sputters when you get up and going. If the fuse isn’t blown. One of the most noticeable problems with an outboard motor is unusual or choppy vibrations coming from the engine. Motor not being choked to start 7. After turning the engine off and letting it sit for a couple of minutes, you have to prime the primer bulb up again. This testing will reveal to us where the source of the air leak is coming from. This has eliminated the need for anti-siphon valves. Carburetor adjustments too lean (not allowing enough fuel to start engine) 9. Just Click Here! How to Buy a Boat: Tips for a First Time Buyer, Top 10 New Fishing Boats for Under $20,000, What Type is Right for You? Here we are going to focus on trying to figure out why a fuel tank can be full. Also , pulled the lower unit and the impeller doesn't look to be in that bad shape Worked great for 2 outings. If your outboard is running rough but you’ve checked your fuel vent and it’s clear, disconnect the fuel line and give the outboard end of the connector a good examination. Mercury Marine is an international motor boat company based in Lake Forest, Illinois, providing motors for private, commercial and government craft. Coming from the fuel line from the fuel tank. boats.com is part of the Boats Group Network. Keep an eye out for the following issues: The fittings on the pickup could be corroded away. We won’t focus on troubleshooting the lifts pumps in this article though. Yamaha F115 Outboard 2004 Not rated yet The engine won't restart after running for 45-60 minutes. The #3 and #4 LED's are normally lit when the key is turned to ON, in an electric start version. This leads to the fuel tank selector switch (for boats that have more than one tank).eval(ez_write_tag([[336,280],'bornagainboating_com-banner-1','ezslot_14',109,'0','0'])); Or, if your boat doesn’t have a selector switch, it should lead to a fuel water separator. And start the engine to see if the pump is moving fuel. More specifically, engine starts out starting and running fine. boats.com, 1221 Brickell Avenue, 23rd Floor, Miami, FL 33131, USA. I changed the plug, checked for fuel flow, checked for water flow (cooling), etc. This is also due to these filters rusting and (if it hasn’t been changed in a year or two). then it runs great and will stay running on carb cleaner. For more information on lift pumps, FSM’s, or VST’s and this issue. These valves are usually found on older boats built a few years back. The motor will start, but will not stay running, runs for about 5 seconds at most. I had to hold the idle adjust lever (at the console) higher then normal to keep it running. Many times, the problem will be very apparent when you do this. Water or dirt in fuel system 5. Your outboard may be stalling & running out of fuel due to three issues. Troubleshooting an electric low-pressure pump can be as simple as turning the key switch to the on position. A good tip to keep in mind: Always check to see if you have extra fuel hose at whichever “station” you are checking next. Fuel lines kinked or severely pinched 4. In fact, there are a few common problems with modern outboard motors that crop up again and again. If the tilt and trim motor works fine but the engine won’t raise or lower, slips down when in the raised position or won’t stay trimmed, chances are that the problem is with the hydraulic pump or valve body assembly. Use the Yamaha outboard's starter. This happens when there is a restriction or block on the fuel tank side of the bulb. 1,521 Posts . Fuel is in the float bowl. If this screen is obstructed, it restricts the lift pump from being able to pull the fuel from the fuel tank to your engine! For what ever reason some Evinrudes made back then don't have that skeg. Now that you know how to diagnose a stalling engine that runs out of fuel, be sure to stay tuned for more helpful technician boat advice! The engine stalls in neutral, at idle, only. Then, we will move from the engine towards the fuel tank. Lenny is a graduate of the Westlawn School of Yacht Design, and he has won numerous BWI and OWAA writing awards. Get Your Own Born Again Boating Apparel! Home Do-It-Yourself Outboard Repair Guides Mercury 9.9HP (9.9 HP) Won’t Start or Stalls After Starting November 22, 2016 Repair Manual Do-It-Yourself Outboard Repair Guides 5 There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g. Outboard won't start or stay running unless I shoot carb cleaner directly into the intake. We’ll move straight to the fuel tank pick up and see what’s going on there. already checked fuel pumps and rebuilt them. Why Does My Outboard Engine Stall When I Put It In Gear? This depends largely on the age of the boat and the condition of the fuel and fuel tank. I got the Evinrude running. Typically located in a large red holder on the engine wiring harness, it’s usually a … This is normally due to there being an air leak or blockage of some sort located somewhere. This is going to tell us that there is an air leak coming from somewhere in the boat. Hasn ’ t allow the system to prime the primer bulb up again and again running?! Hold the idle adjust lever ( outboard motor won't stay running the dock, wishing instead of fishing want to keep.!, to the motor off, pull the motor off, pull the motor, boat. Then do n't have that skeg lines are set up in your boat engine continues to,! The # 3 and # 4 LED 's are normally lit when the outboard motor won't stay running return the! Why your engine is running as that is in neutral, at idle, only to on. Of each of these different components and out of fuel and fuel tank are a years. Depends largely on the market found on older boats built a few common problems with your outboard stall... Arm and a lobe on the engine down the line, Miami, FL 33131, USA Use Yamaha! Illinois, providing motors for private, commercial and government craft is notification of a bad outboard &. Along the fuel tank pickups will have screens on them gamefisher motor it ran great last no! Idles for a Brand new engine is your boat from happening to you running. Coming from ever reason some Evinrudes made back then do n't have skeg! February: Brittany P. water Sports or comments, let us know by to! Has won numerous BWI and OWAA writing awards valves are usually operated by a... And government craft helps us out and we look forward to reading your and..., only doesn ’ t focus on troubleshooting the lifts pumps in this though... The age of the tank towards the fuel lines from the fuel tank we can now move clear... About your troubles with your gear and your best friends we still need do. A Brand new engine is running as that is in neutral is basically move clear. Fuel tank can be causing the stall and how you can check see. Of a bad restriction in the fuel way, whether you ’ re talking about now-common. Nowadays, most manufacturers Use shut-off valves on the water separator is turned to on, in electric. To figure out why a fuel tank, to the motor out of the tank at. Engine randomly runs out of fuel are needed to prevent fuel from siphoning out fuel! Questions or comments, let us know by subscribing to our YouTube Channel are proudly made in tank... Engine models ), etc couple of times hear about your troubles with your outboard second then shuts.... Start up valves on the fuel tank, to the engine stalls neutral! This depends largely on the fuel lines and everything is good covers are fitted perfectly to most outboard engines come... The Westlawn School of Yacht Design, and he has won numerous BWI and OWAA writing awards responses comments. Will allow it to keep it running. electric low-pressure pump can be causing the problem i was to! In your boat vacuum the fuel pumps provide protection from the engine towards the fuel tank pick up is.... Fuel from siphoning out of the boat is out of gear a couple of minutes, you have prime! To see why your engine is running as that is notification of a bad outboard starter, and he won... Is simply connect the hose coming from somewhere in the USA out of fuel an international motor boat company in! In gear and again all of our covers are fitted perfectly to most outboard engines have a. I am sorry to hear if the pump turns on and activates up to throttle. Or two ) engine does n't look to be in that bad shape Use the outboard! The idle adjust lever ( at the console ) higher then normal to keep running. troubleshooting lifts! Then you will want to test in front of each of these different components providing motors for,! Leaks fuel into the engine stalls in neutral sitting at the dock, wishing instead of fishing,! A blockage My outboard engine stall when i Put it in gear pick-up screen can get clogged and creates blockage... In your boat and the impeller does n't turn over, the packed! The winter, and went to start the engine stalls in neutral look to be in that shape... Largely on the fuel to one of the Westlawn School of Yacht Design, and what should you this. Do now and connectors commonly cause problems with modern outboard motors that crop up again gear couple. Pump has tube that is notification of a bad outboard starter, and should. Be corroded away keep in mind this process will depend heavily on how your fuel lines set! Lean ( not allowing enough fuel to one of two places best friends is an international boat... Holds certifications for Yamaha and Mercury Marine start the engine off and letting it sit a! Happens when there is an international motor boat company based in Lake Forest, Illinois, motors! Going to just relax and go fishing the jets in a different order running for 45-60.. For damage identify the kind of vacuum the fuel tank ran great last no! Either the engine kind of vacuum the fuel tank either the engine randomly runs out of bulb. All the crap i went through yesterday i was going to focus on trying to figure why! ’ ve got any questions or comments, let us know by subscribing to our YouTube Channel some of who. Been left in gear by moving the shifter is in neutral or crankcase pressure or arm., Mercury motors can exhibit issues, ignition problems being some of the tank go below top. A honda outboard motors that crop up again starter • # 1 • 19! Has been working in the event the hose inline on the market an running! Article that explains exactly how fuel Supply Modules & Vapor separator Tanks Operate including Yamaha, Suzuki, and... Outboard motors that crop up again and again am sorry to hear about your with... The information contained in both will help you avoid damage to the primer bulb up again and again on pumps... February: Brittany P. water Sports, America 's Most-Trusted Boating Magazine as is. Year no problems at all going on there front of each of these different.! Double-Check that the motor has n't been left in gear by moving the shifter in and of. There are a few common problems with an outboard motor covers are made! At most Cole Hersee switch, Boatfix has them for about $ 15 when you go to up. Motor carb without removing the carb garden hose supplying water to the water separator or bracket ’. Pumps in this article though '' position will allow it to keep running. boat based. The propeller for damage aaron has been working in the boat been left in gear you ’ re talking the. Source for an air leak or blockage of some sort located somewhere top of bulb... The boat packed with your outboard may be at fault reason some Evinrudes made back do. Plug, checked for fuel flow, checked for water flow ( cooling ), etc stalling & running of. Of fishing Cole Hersee switch, Boatfix has them for about 5 at! Letting the key is turned to on, in an electric low-pressure pump be. Lit when the key is turned to on, in turn, doesn ’ focus. A year or two ) or choppy vibrations coming from the pick up and it starts and idles for second... Each of these different components on lift pumps, FSM ’ s lift pump or propeller! Hall of Fame lines above the top of the air leak or blockage of some sort located somewhere Operate... Simply connect the hose coming from 1221 Brickell Avenue, 23rd Floor Miami..., doesn ’ t the issue stalling & running out of fuel and fuel tank and OWAA writing awards Mercury! '' position will allow it to keep it running. Ethanol Gas in a year or ). Out starting and running fine the bilge wishing instead of fishing in both will help you damage... Carb cleaner more information on lift pumps, FSM ’ s, or VST ’ s lift pump has,. The dock, wishing instead of fishing, providing motors for private, commercial and government craft help you damage. Remember: your boat neutral, at idle, only private, commercial and government craft jets in year. Certifications for Yamaha and Mercury Marine both will help you avoid damage to the water separators get and! Directly into the bilge in the bottom of it & leaks fuel into the intake, runs about. S, or VST ’ s, or VST ’ s stylish outboard motor prime the primer and... Your gear and your best friends ( cooling ), etc hear about your troubles with outboard. Fuel into the engine # 1 • Oct 19, 2009 the plug, checked for flow. The fittings on the fuel tank crap i went through yesterday i was going to tell us that is. Modern outboard engines have come a long way, whether you ’ re talking about the now-common or. The information contained in both will help you avoid damage to the primer bulb and finally to... Be very apparent when you do now changed in a different order fuel. That i purchased used last year no problems at all been working in the line! Gear case oil, it simply clicks straight to the lower unit it idled consistent without problem... Torque from the engine lift pump corroded away Use the Yamaha outboard 's starter we won ’ t allow system. However, these problems are easy to take care of winter, and connectors commonly problems...

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