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Briggs and Stratton engine carburetor model 303777 - 0015-02 problem

#1

G

gamblermechanic

I was recently given a Sears 14 HP lawn tractor that the owner could no longer use due to health problems. The tractor is in very good condition considering its age but needed minor work (replacement tires and check over) as it had not been used for four years. The owner religiously had the unit serviced each year by a friend who repaired small engines and relied on him to insure the machine was well-maintained.

The tractor was cleaned up, fresh fuel and oil added and cranked to see if it would start. It did not; a few seconds later, fuel commenced to run out the bottom of the tractor and I had to clamp off the main fuel line. I assumed the carburetor was leaking (dried gaskets, cracked or bad hoses, etc.). Once I got to the carburetor I found a hose from the rear of the air filter to a fitting on a square brass base to the left and bottom area of the carb did not have a clamp. Also, fuel was pouring out from a small fitting to the right side of the main fuel line input. No hose was attached to the small fitting and if it was plugged and the engine cranked, it was obvious once my finger was removed that the fuel was under pressure as it would spray out once the engine was shut off.

My question is: if a hose fits over the small fitting, where does the other end connect?? I am unable to find a corresponding place to attach the hose.

This is my first experience with a dual-cylinder engine and I have no idea what the other related part(s) connected to the carburetor and valve cover area do - reference the multi-input silver-coloured part located over the left valve cover. I am unable to find any photos from the parts sheets available on line regarding any connection to the small fitting on the side of the carb. Info on the tractor in general is non-existant other than it was manufactured in the U.S. for Sears Canada.

I live out in "the sticks" and without removing the entire engine and traveling 50 miles to a small-engine repair facility I am instead attempting to solicit a possible answer from a forum member for a fix. Thanks in advance.

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#2

StarTech

StarTech

What about image big enough we can clearly. Something on the order of 600x600 DPI and not 67x90 dpi?

This is simply too small.
1657556082671.png


#3

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gamblermechanic

My apologies StarTech. The original photo was far to large to attach and I had to keep reducing it but the edit did not work properly. I am not the best on computers but I will get it up to a decent size.

Thanks


#4

S

slomo

Probably doing this on some prehistoric cell phone. As in cell phone. Not a real camera.

Have one of the kids or grand-kids help you out.


#5

StarTech

StarTech

Even my old LG GS170 takes better pictures.

here is what the image looks here now.
1657560054519.png
I give up trying to see this as it is worse than my eyesight with eyeglasses and I at 350/20 on per prescrip.


#6

G

gamblermechanic

Even my old LG GS170 takes better pictures.

here is what the image looks here now.
View attachment 61446
I give up trying to see this as it is worse than my eyesight with eyeglasses and I at 350/20 on per prescrip.
I don't blame you for giving up on the "photo" (it was taken with a Panasonic Lumix camera but the pic size was set to 5meg!

I'll tear out the motor and take it into the big city when I go for an appointment next month.
Thanks


#7

B

bertsmobile1

Once you have reduced the resolution it can not be increased
So a new photo is needed
because no one seems to understand pixels resize to 12" along the longest side and set the resolution to 72 dpi


#8

S

slomo

as it had not been used for four years.
Carb and several other items need looked at.
fuel commenced to run out the bottom of the tractor and I had to clamp off the main fuel line. I assumed the carburetor was leaking (dried gaskets, cracked or bad hoses, etc.).
All fuel lines, filter and inline shutoff valve need replaced. Carb needle sticking open.
fuel was pouring out from a small fitting to the right side of the main fuel line input.
Think you are talking about fuel pump lines maybe? Need a better picture or video. When you figure it out send a lot of pictures. More info you give us the more help we might offer you.


#9

G

gamblermechanic

Once you have reduced the resolution it can not be increased
So a new photo is needed
because no one seems to understand pixels resize to 12" along the longest side and set the resolution to 72 dpi
Thank you for the information bertsmobile1 -- I shall apply this when I once again photo the carburetor area.


#10

G

gamblermechanic

Thank you for the information bertsmobile1 -- I shall apply this when I once again photo the carburetor area.
Carb and several other items need looked at.

All fuel lines, filter and inline shutoff valve need replaced. Carb needle sticking open.

Think you are talking about fuel pump lines maybe? Need a better picture or video. When you figure it out send a lot of pictures. More info you give us the more help we might offer you.
Carb and several other items need looked at.

All fuel lines, filter and inline shutoff valve need replaced. Carb needle sticking open.

Think you are talking about fuel pump lines maybe? Need a better picture or video. When you figure it out send a lot of pictures. More info you give us the more help we might offer you.


#11

G

gamblermechanic

Many thanks to slomo for the advice. Yes, the fins, etc. have been cleaned and I shall provide better and more pics vs. waiting a month to take the engine to a repair shop.

The small hose?? fitting will allow the entire fuel tank to drain after the engine is started and shut off so there must be a connection to somewhere else on the engine.


#12

G

gamblermechanic

As requested, upgraded photos of the B&S 303777-0015-02 carb provided. As there have been previous postings regarding this model (perhaps the 0015-02 designation is somehow different) I thought someone who had knowledge of this unit could provide info. re: hose connections. Thanks for your time.

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#13

S

slomo

Many thanks to slomo for the advice. Yes, the fins, etc. have been cleaned
There's clean then there's CLEAN. Um, you need to revisit this. Look to the left in your picture where the carb mounts. Getting pretty snakey there.

Show me the cooling fins. 🍿 That grit and oil slime will insulate the fins and block causing overheats.


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