keeps on happening? Any ideas? Thanks Anne
Sport & Outdoor – Others
Experienced athletes share their insights in answering this question:
The alternator is responsible for keeping the battery charged while it’s running. An ohm meter on the battery should show more than 12 volts when the motor is running. A very simple way
to test an alternator, is to disconnect the positive battery cable while
motor is running. If motor dies, the alternator is bad.
to test an alternator, is to disconnect the positive battery cable while
motor is running. If motor dies, the alternator is bad.
How to Identify and Resolve Common Issues ?
We offer a diverse range of insights on identifying and resolving common problems in sports. Our sources encompass academic articles, blog posts, and personal essays shared by seasoned athletes. :
Loose fuel line connections, pinched or blocked fuel lines. It would be best to inspect all fuel lines for any bad connections, damage to the line, and leakage issues. Replacing a damaged fuel line is typically the best course, as repairing a damaged line naturally leads to further problems within a short period.
You most likely have a filter problem or fouled plugs. That could be why your boat motor is losing power. Solution: Replace the in-line fuel filter.
Key Signs to Look For
You won`t have any trouble diagnosing the faulty regulator rectifier if the battery is the cause. You`ll note signs right away like poor starts, fluctuating meter readings, and dimmed headlights. around 13 volts, the bike will start to drain the battery.
All outboards have a self-draining cooling system. There is no reason to start the motor with the notion that you are going to purge the last drops from the water pump housing. Maybe the sound of an unmuffled two-stroke is irresistible, but don`t do it.
It`s best to tilt your outboard up when leaving your boat in the water to prevent marine growth from forming and from corrosion eating away at its metal parts.
Stalling problems can be traced to: A spark plug fouled by fuel, carbon, dirt or oil on the electrodes may not produce a spark strong enough to ignite the air/fuel mixture and start your engine. A dirty flame arrestor/air box can cause your boat engine to stall. Remove the debris using carb cleaner and a wire brush.
Every boat owner is different and how far you decide to push your marine engine is in your hands. However, running your boat at Wide-Open Throttle is not bad for your engine and can even help clear out carbon build up.
2 things can cause this. An air leak before the primer bulb or the fuel pump check valves are leaking. Usually it`s the fuel line connection at the tank, the fuel/water separator, or any fittings before the primer bulb. Also always try to have the primer bulb facing upward.
A few hours every week keeps the motor in better shape than using it two or three full days every month. The more often it gets used, the better it will run, just like any vehicle. If it`s left sitting idle at the marina or in a garage for the majority of the time, parts tend to go bad faster.
A very simple but telling test for alternator condition is to switch your voltmeter to the AC volts setting while the leads are still connected to the positive and negative posts on your battery. You should get a very low AC volts reading in the range of 0.000x.
By Rob Erlick. Engine RPM bog down occurs as the engine is loaded beyond its torque-producing capabilities. This occurs when engine RPMs are allowed to decay below the design specification. Bog down can occur during ground start, taxi, and the landing roll.
Fuel Vein Blockage
Eventually the blockage can cause a complete stoppage of fuel going into the engine, therefore causing it bog down and stop. If you suspect you have a blockage, the best cause of action is to strip down the carburettor and blow down the fuel veins with an air line or air blower.
The presence of oil and its distribution is absolutely crucial to an engines continued operation. Engines can work without oil, but the effect is so damaging they are only capable of running for less than 30 minutes until failing – and in most cases, it`s a lot quicker than that.
A full flushing of the motors must be done after every use, and it`s recommended every six weeks if it`s been sitting in storage. It`s important to run the motors long enough for the thermostat to open, allowing the fresh water to flush the salt from the entire powerhead.
Tests prove that Globe`s Run-Dry® impellers outperform standard neoprene or rubber impellers and are guaranteed to run-dry for up to 15 minutes.
Modern cruise ships are designed to be able to roll up to 60-degrees and recover, in this picture, Costa Concordia has partially sunk and is lying at a 65-degree angle. For context, the picture above shows Costa Concordia after she partially sank in January 2012. In this picture, she is lying at a 65-degree angle.
Typically, this means changing the lower-unit lube every 100 hours (or at lay-up), and on a four-stroke, the crankcase oil, too. You can suck out the crankcase oil through the dipstick tube but changing the lower-unit lube means hauling the boat.
Common signs include reduced engine performance, black smoke coming from the exhaust, backfiring, overheating, or hard starting.
The Mass Airflow Sensor (MAF) measures the amount of air the car needs to accelerate. Once it gets that measurement it sends this information to the ECU which notifies the throttle to open accordingly. If the MAF is faulty and not measuring the airflow properly then you could experience a serious loss in power.
Winding insulation breakdown and bearing wear are the two most common causes of motor failure, but those conditions arise for many different reasons.
When a boat is over-propped (the propellers have too much pitch), the outboard(s) highest achievable RPM is lower than the manufacturer`s recommended wide-open-throttle RPM, which typically is between 5000 and 6000 RPM.
If regular maintenance has been done on the motor throughout its life, then 500 hours may not be considered excessive. However, if there has been little or no maintenance done on the motor over its lifetime, then 500 hours could indicate that it`s time to replace it with a new one.
Why do boats burn so much gas? The main reason why boats will always burn more gas than cars is they run on water. Aerodynamics, wind resistance, waves, and drag affect the fuel consumption of a boat. Basically, a boat needs to use more fuel to cover the same distance a car will cover.
A clogged air filter will starve the engine of oxygen, causing the engine to die at full throttle. A clogged air filter will often cause your engine to idle rough as well. As part of your normal maintenance routine, you should check the air filter for heavy build-up, and replace if necessary.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
I have a Mercury Outboard, it keeps draining the battery after 2 or 3 days. We have replaced the starter motor, spark plugs, fuel filter but it keeps on happening? Any ideas? Thanks Anne
ANSWER : The alternator is responsible for keeping the battery charged while it’s running. An ohm meter on the battery should show more than 12 volts when the motor is running. A very simple way
to test an alternator, is to disconnect the positive battery cable while
motor is running. If motor dies, the alternator is bad.
to test an alternator, is to disconnect the positive battery cable while
motor is running. If motor dies, the alternator is bad.
Read Full Q/A … : Sport & Outdoor – Others
My 1977 Evinrude 140 HP outboard engine looses power when it hits @4,200 rpm’s and goes down to 3,500 then back up to 4,200 and then back down to 3,000 or about there. This would continue if I didn’t slow down to 3,000 on my own. It runs fine at @ 3,000 when I slow it down. I have changed all the fuel lines from the fuel tank to the carbs, removed, cleaned out the fuel tank, put new gas and added a can of SeaFoam. I replaced the water seperator filter and cleaned the fuel filter. I feel the fuel pump is operating OK. Any ideas about what could be causing my problem? Could it be a bad power pack or stator? Help!!
ANSWER : Hi, this is obviously a stator problem since you have cleaned the fuel filter..
Take care
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I have a 1996 yamaha wave venture 1100….ran greatsat for 2 yrs..started but only ran for spray into carbs….drained fuel started and ran good. Started about month later and would only run as long as primed with starter fluids…checked fuel filter(ok)…fuel flow to fuel pump ok…output of fuel pump appears ok….but engine will only run as long as starter fluid/gas is sprayed into carbs. I don’t think it’s the carbs as it ran great a month ago…now it’s starving for gas flow….so it appears to be a fuel delivery problem…what would be the sequence of tests up to tearing into the carbs? is there a fuel filter inside the carbs? remember it fires off great when primed…until the fuel spray is consumed…
ANSWER : Check the on/off/reserve valve
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I just purchased this Yamaha boat w/Twin MR-1 140hp motors, less than 100hrs (60 prox)and the starboard motor only reached 8000rpm on a 10000 redline spec (the port motor reaches 10000rpm. I have replaced the spark plugs immediatly and now the motor reaches 9500rpm. When the plugs were replaced the plug wire top of the plugs had a black powder residue (like graphite)and #1 & 4 plug electrode end were black minimal soot and #2 & #3 had a white color residue on the ceramic.
Any suggestions to attain the full 10000rpm?
A Yamaha dealer is 100 miles, so I would like to fix myself if possible. Thanks
ANSWER : I never rec’d an answer…..I WANT A REFUND!
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Spark plug wire boot grounding out on coil, 96 outback 2.5 automatic, just put new spark plug wires, new spark plugs, and new coil on. ran great for two weeks, now spark is jumping out of boot at coil on one wire, put old coil back on and still does it in the same spot. replaced wires again, and still does it in the same spot. seems to do it only under a load. Is my new spark plug on that cylinder bad? Does the coil need some insulation under it? It is the coil that sits right on top of the motor. Any ideas? thanks.
ANSWER : Sparks are high voltage, and will always follow the path of least resistance. If you can visibly see a spark (whether in a lighted area, or in the dark), that means either that a plug wire (or coil wire) is open (non conductive), or your have a carbon track on the surface where the spark can be seen, but most likely you have BOTH problems!
If you have an ohmmeter, check the resistance of each wire involved, particularly spark plug wires … which means you must be able to connect to both ends of each wire at the same, and hopefully, FLEX those wires, to be sure they don’t have a break inside that is intermittent (comes and goes)!
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Water in the fuel tank of my Zodiac dinghy with Yamaha 2001 50 HP
ANSWER : I’d add a little dry gas to **** up any remaining water and give it a shot
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2005 4 stroke yamaha 150 550hrs. normally use every week but due to surgery not used for 10weeks. Just before I went down I changed internal fuel filter, and zincs in motor. finally put in sunday. motor started fine left dock hit the power and started to come up on plane then stuttered and died. changed the external fuel/water seperator pump up the primer and started up again. with in a minute died down again. limped back to dock checked fuel filter and plug wire connections. pumped up primer and left dock went right onto plane for maybe 150yds then coughed and died. I could pump up primer and it would run but then die out. the fuel filter at the front of the engine would run dry until I pumped it up again. If it were a car I would suspect a leak in a fuel line but I can’t find any sign of one.
before we launched I put 10 gallons of fresh fuel in and added another bottle of ethanol stabilizer (CRC brand)
what proceedure should I follow to isolate the problem? I am a fairly competent mechanic as far as cars and trucks go. I don’t really want to have to take it to a marine mechanic.
before we launched I put 10 gallons of fresh fuel in and added another bottle of ethanol stabilizer (CRC brand)
what proceedure should I follow to isolate the problem? I am a fairly competent mechanic as far as cars and trucks go. I don’t really want to have to take it to a marine mechanic.
ANSWER : This is going to be the fuel pump is not pumping any fuel. The primer is acting as a fuel pump. When you prime it, it gives the engine enough fuel to run for a little bit. But as soon as the fuel runs out, the engine is dying. So this is going to be a bad fuel pump.
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