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.
Why does my engine stall when I give it gas?
Some common reasons for motor vehicle stalls include: An empty gas tank. A fuel mixture that isn’t rich enough (this is usually the cause of cold stalling and intermittent stalling) A faulty fuel pump, alternator or EGR valve.
Is it bad to run an outboard engine at full throttle?
As long as you are propped correctly and can hit the upper end of the RPM range, [to run an engine at its maximum throttle all the time] is not a problem. Most smaller engines have two speeds, OFF and WOT. Very rarely does an engine wear out. Keep up with maintenance and you will be fine.
Should you run the gas out of your boat motor?
There is no harm in running your motor out of fuel with four strokes engines, but it’s not necessary to do in most cases (again, refer to your owners manual).
What causes a boat motor to bog down?
Fuel Vein Blockage
Even the smallest piece of debris that gets past the fuel filter can cause issues the further down the veins it manages to travel, as the veins get smaller and smaller in size. Eventually the blockage can cause a complete stoppage of fuel going into the engine, therefore causing it bog down and stop.
Why won’t my car stay running unless I give it gas?
The computer simply feeds a little extra gas through the fuel injectors to start the engine. … This was necessary because the carburetor does not feed fuel as efficiently as a fuel injection system does at low (starting) RPM. It may be likely that you have a faulty idle air control valve.
What causes engine hesitation on acceleration?
A vehicle that hesitates while accelerating or while driving up a hill may have a weak fuel pump. … Fuel injectors may become dirty over time and not be able to provide as much fuel to the cylinder as is needed. Dirty fuel injectors may cause the engine to run lean which will in turn, cause hesitation when accelerating.
How long can you run an outboard at full throttle?
In a 4 cycle at 80 % load oil may last 100 hours. Take it to 100% and you might be down to 25 hours. My first “adult” boat I had a Mercury 115, similar vintage. No joke, I ran that engine full throttle all the time if I was inshore.
How far below the bottom of the boat should the prop be?
If you have a short shaft motor, the top most part of the transom and the lower most part of the boat should be about 15 to 16 inches. For a long shaft, I think 20 to 21 inches is correct.
What are the symptoms of a bad fuel pump on an outboard motor?
When the outboard fuel pump is bad, it operates similarly to when the boat runs out of fuel. You might notice sputtering or misfiring before the engine cuts out completely.
Can I leave gas in my boat over winter?
In fact modern gasoline, especially gas that contains ethanol, can begin to go sour in just a few weeks. It’s a good practice to stabilize boat fuel all season. If you have a smaller boat with a portable tank, use that to mix stabilized fuel and run it through the motor.
How long before gas goes bad in a boat?
The pure gas tends to lose its combustibility because of evaporation and oxidation. Such gas is said to last for only 50 to 90 days. In other words, the brand new sealed tank of gasoline can stay good for 120 days but used, or old gas has a life expectancy of about 90 days at most.
How often should I run my boat motor?
Run it regularly
Oil drains away from internal components and back into the pan, but running the engine every so often, even when you don’t have a chance to really use it, helps keep things in working order.
Why does my carburetor bog down when I accelerate?
The “Bog” simply means the engine is not receiving enough fuel when you go to wide open throttle. While there are other issues that may cause similar reactions within the carburetor, often the problem can be traced back to the accelerator pump system. Incorrect adjustment is the typical culprit.18 мая 2010 г.
Why does my 2 cycle engine stall when I give it gas?
When a weed eater starts okay but dies when throttled, it often indicates that there is restricted fuel flow. A fuel filter can get clogged with impurities to a point that it allows a small amount of fuel through (enough for starting and even idling) but won’t let it through at a rate sufficient to rev up.
What causes a two stroke to bog?
If the clip position is too lean the engine will sound quiet and have a “dead” feeling possibly hesitating. A needle that is set in a clip position that is too lean will also cause hesitation or “bogging” when full throttle is quickly applied. where it sounds too rich.