89 force 125 leaking fuel from carbs

nvanzee

Seaman Apprentice
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Mar 2, 2015
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33
Recently bought an 89 Bayliner for a good price. Just bought it to swap the motor onto my pontoon. So I don't know a whole lot about it. Guy said it ran but I don't know for sure. Anyway I try starting it and fuel leaks out the front of both carbs. Pulled the carbs apart and the needles looked to be in good shape alone with the seats. Float sat parallel with the body. They are the original foam like floats which I've heard can get fuel logged. Maybe that's my issue. But I put it all back together a fuel is still leaking out the front and it's almost spraying out two little holes on each side. Not sure exactly what they are. They are brass little plugs with a tiny hole in the center. Would this be a float issue or maybe a fuel pump issue? I don't have a primer bulb to see what that does. (Previous owner removed the fuel line for whatever reason). Anyone have a similar issue or know what to check first? Not trying to put a ton into since I still don't know how it runs. Got it fired up for a second but shut it down since it was spitting fuel everywhere.
 

Nordin

Commander
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Jun 12, 2010
Messages
2,566
Your issue is the inlet needles do not seal properly.
The tiny hole in the brass plug is went holes for the carb and if the needle do not seal fuel will come out through the hole.
I would suggest you to pull the carbs apart and clean them out very well with carb clean fluid and compressed air.
The inlet needle can be in two different styles.
1. Steel needle with a steel tip and the seat in the carb body has a rubber seal.
2. Steel needle with a rubber tip and the seat in the carb has a brass seat.
Check the tip at the needles if worn. You can not put a rubber tip needle in a carb that has a rubber seal and vice vers.
After you cleaned the carb, check the inlet needle function by turning the carb up side down and blow with your mouth in to the fuel inlet, it should be closed.
Turn it back and check that the needle will open.
Maybe you have to clean out the carbs twice, experience from myself.
Sometimes one cleaning is not enough.
 

jerryjerry05

Supreme Mariner
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May 7, 2008
Messages
18,049
The foam floats: usually they don't get saturated? make sure there set right? the brass plugs with the hole are for low speed jets(not used on all the 89 125 carbs)(wonder if they were replaced somewhere along the way???) there was 3-5 different carbs used on the 125. Post a few pics of the carb.
Clean the carbs again, check the tips of the needle and the rubber seats(if there is one)
 

puffitu

Chief Petty Officer
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Dec 30, 2018
Messages
555
Get the needles right; sealing as was recommended. Install fuel filter back and primer bulb. Linc n sink and post back
 

nvanzee

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Mar 2, 2015
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33
Been pretty busy lately but pulling carbs back off tonight to clean them again. We will see what happens after I do that. Here's a few pics of my carbs. Fuel was squirting out of the hole just above the bowl in the first pic along with the hole towards the top in the second pic
 

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jerryjerry05

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The second pic's hole: fuel from that shows the floats not set right or the needle/seat is defective??? or dirty???
 

nvanzee

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Mar 2, 2015
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I pulled it back apart and I had debris in the bowls and around the needles. Not sure where it came from since I just had it all cleaned out. But cleaned it all out again. I'm going to get some new fuel line and a primer since I didn't have one. I was also surprised the bowls were completely empty. Wondering if part of my problem was air in the lines as the bowls were trying to fill causing it to squirt out the vent. Since I didn't have a primer bulb and was relying on just the pump to move the fuel. Will try firing it again probably tomorrow night.
 

puffitu

Chief Petty Officer
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Dec 30, 2018
Messages
555
Ok well several issues; you must have primer to fuel pump to in-line filter to the carbs in that order. Blow all crap out the carbs paying attention to the jets snd needles. Set floats correctly-change the fuel lines; if old
 

jerryjerry05

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May 7, 2008
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18,049
Install a filter between the pump and the carbs.
Fram G2 G3 G12 one of these will work and it's clear so you can see if there's any junk in the system?
Dry float bowls? needle/seat dirty, hose bad?
 

nvanzee

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Mar 2, 2015
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Got the carbs all cleaned out again and out back on. Replaced the fuel lines a added a primer bulb. Didn't add an in line filter but I will. Fired it up and no more leaks. Runs great. Thanks for the help.
 

puffitu

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Dec 30, 2018
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555
Did you ever figure out where the debris came from?? No; the more the reason for in-line filter
 

WinnerCougar74

Petty Officer 1st Class
Joined
May 12, 2020
Messages
238
Double check your fuel pump diaphram. I had a ripped one that when I pumped the primed bulb fuel would spill out of the lower carb and down the exhaust leg. It's easy and fast to check and a week point on these motors.
 

nvanzee

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Mar 2, 2015
Messages
33
Did you ever figure out where the debris came from?? No; the more the reason for in-line filter
I think it was from the fuel lines. They were pretty dry rotted. Not sure if they were even rated for fuel.
Seems to be all good now
 

jerryjerry05

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May 7, 2008
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18,049
IF??? Ethanol was ever used it could be the problem???
Ethanol deteriorates the inside of the hose and delaminates the inner lining.
Had a hose swell and shut off the flow of fuel, looked like a couple of curly pigs tails, didn't leak but stopped the fuel from flowing.
 
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