If the bottom cylinder is the bad one and the needle valves are good its the fuel pump diaphragm that is probably stretched and pumping too much fuel. This can over whelm the needle and float of the lowest carb
This comment saved me a ton of money. I was about to drop $300 for a carb rebuild and acted on this comment. $30 later for a fuel pump gasket kit and my issue was solved! Thank you
I have a brand new Mercury 9.9 with this issue. Likely due to having ethanol in the fuel all winter. Marina turn times are slow for work right now so, I called and they suggested that I either, loosen the bleeder for the fuel bowl and drain it or, if that doesn’t work. Take carb apart and clean the seat with a q-tip and toothpaste. Polishes it up and prevents future sticking. I’m going to give that a try today. Nice video btw!
Thanks for your descriptions. I must have a float sticking in wide open. Pissing as much fuel out the overflow as there is coolant water being discharged. I don't have time to open the carb today, but one clank of the channel locks stopped my leak for now. Thanks for the hack. And oh yeah... No more ethanol fuel for me!
Try pushing the float pin in from the other side. ( diameter of the hole in the other ear can be larger). Some carbs have an arrow on the cast- ei.Harley's). This could be helpful and not damage the ear.
Adjusting the float level to compensate for a faulty needle as you suggest is not a good idea. What happens when you do this is that the bend you apply to the adjustment tab forces the float deeper into the bowl and thus exerts more pressure against the needle. This MAY stop the flooding condition but it also introduces a NEW problem. The new problem this creates is that now that the float is deeper into the bowl it displaces some fuel giving you a lean running cylinder due to the venturi effect you mention because the bowl fuel supply is lessened it decreases the amount of fuel that is "sucked" up into the intake. Hard to explain but a practical example is how when an engine runs out of fuel the revs increase as the fuel runs down.
Great video, where the fuel somes into the side...the black part mine is jus a 90° elbow as I only have one carb. Should you be able to blow are freely through that part. Mine seems to be restricted?
It looks like I have an almost Identical motor, same carbs, my problem is the carbs will flood the engine and also spill gas into the engine housing is there a way to avoid this? I have a 1996 90hp Force by Mercury Marine
I’m having the same problem on my 89 85hp force 3 cylinder. My needle looks fine so I guess I will wait for my kit with a new seat. Hopefully that’s the problem.
My 25 horse has 1 carb. But it's flooding out. So would this be the problem on mine as well?? Gas is running out of the air intake. And plugs are wet. With gas. Thanks
Be nice to have all the correct special tools for all the things we have to repair ourselves. Unfortunately not all of us have pockets that deep. Hats off to the man for getting it done with the tools he already has!
@@chucklutter2509 clean pin and holes and it should slide right in: those ears can't take the force of those pliers and will snap off if you get it wrong and pin should just slide in because it will be locked in place by the float bowl once you install that.
If the bottom cylinder is the bad one and the needle valves are good its the fuel pump diaphragm that is probably stretched and pumping too much fuel.
This can over whelm the needle and float of the lowest carb
This comment saved me a ton of money. I was about to drop $300 for a carb rebuild and acted on this comment. $30 later for a fuel pump gasket kit and my issue was solved! Thank you
yamaha 25hp bottom carb dumping lots of fuel.Gonna try this. Thank you
I have a brand new Mercury 9.9 with this issue. Likely due to having ethanol in the fuel all winter. Marina turn times are slow for work right now so, I called and they suggested that I either, loosen the bleeder for the fuel bowl and drain it or, if that doesn’t work. Take carb apart and clean the seat with a q-tip and toothpaste. Polishes it up and prevents future sticking. I’m going to give that a try today. Nice video btw!
Thanks for your descriptions. I must have a float sticking in wide open. Pissing as much fuel out the overflow as there is coolant water being discharged. I don't have time to open the carb today, but one clank of the channel locks stopped my leak for now. Thanks for the hack. And oh yeah... No more ethanol fuel for me!
Good to know Miguel here I'll be following
Try pushing the float pin in from the other side. ( diameter of the hole in the other ear can be larger). Some carbs have an arrow on the cast- ei.Harley's). This could be helpful and not damage the ear.
this. bc no real amount of force should be needed as the pin is blocked in place by the bowl, once installed.
You would’ve been a great professor 🙌
There is a light spring & clip you are missing on the float to push the needle down as the fuel level in the bowl drops.
no. the fuel pressure (or weight alone, on a motorcycle) should be enough to open the needle)
Adjusting the float level to compensate for a faulty needle as you suggest is not a good idea.
What happens when you do this is that the bend you apply to the adjustment tab forces the float deeper into the bowl and thus exerts more pressure against the needle.
This MAY stop the flooding condition but it also introduces a NEW problem.
The new problem this creates is that now that the float is deeper into the bowl it displaces some fuel giving you a lean running cylinder due to the venturi effect you mention because the bowl fuel supply is lessened it decreases the amount of fuel that is "sucked" up into the intake.
Hard to explain but a practical example is how when an engine runs out of fuel the revs increase as the fuel runs down.
Lol - Just no.
What motor is that? Looks like the same as in my sea rayder 130
That is one clean motor
HH Fishing thank you!
Great video, where the fuel somes into the side...the black part mine is jus a 90° elbow as I only have one carb. Should you be able to blow are freely through that part. Mine seems to be restricted?
Thanks, this was very helpful
Will it leak fuel into the engine, or outside the carburetor? My leaks fuel out from the bowl and out everywhere..
you might be missing a (proper) gasket or the bowl was overtightened or bent sometime?
Look at that outboard 👀 outboard is a Jew like a piece of candy I love a beautiful engine
It looks like I have an almost Identical motor, same carbs, my problem is the carbs will flood the engine and also spill gas into the engine housing is there a way to avoid this? I have a 1996 90hp Force by Mercury Marine
Ethan Brule yes, you may need to free up your float travel, or get a new needle
I’m having the same problem on my 89 85hp force 3 cylinder. My needle looks fine so I guess I will wait for my kit with a new seat. Hopefully that’s the problem.
They changed the float part number and the new one is a different
Thanks for this video very good info
My 25 horse has 1 carb. But it's flooding out. So would this be the problem on mine as well?? Gas is running out of the air intake. And plugs are wet. With gas. Thanks
Scott Cozart 100% that’s why it’s flooding
Did I hear 98.1 kvet in the background?
I own a 6hp mecury 4cycle boat motor. Gas is running out both over flow hoses on the caburator. Can someone tell me what's causing this? Thanks.
hhawki3 maybe float is stuck, bad needle vale or seal is shot
Never do what this guy is doing installing that float pin. You'll break the ears. It should slide in easily if it doesn't clean the pin and the holes.
I a 125 cc dirt bike and it floods soon as i turn on the gas line idk to please help
float stuck open
What alls dont to that motor
shout out the the float bowl screw
I guess a carburetor would be just like a toilet if you put shitty gas in it.
🤣
Good info. Thank you.
Nice.
Maybe you need a bigger hammer
Channel lock water pump pliers on a float pin???? Hacker!! Butcher!!!
Be nice to have all the correct special tools for all the things we have to repair ourselves. Unfortunately not all of us have pockets that deep. Hats off to the man for getting it done with the tools he already has!
@@chucklutter2509 clean pin and holes and it should slide right in: those ears can't take the force of those pliers and will snap off if you get it wrong and pin should just slide in because it will be locked in place by the float bowl once you install that.