Export thread

carburator rebuild help needed.

#1

S

slyme

Im working on a b/s 17.5 engine and I cant get the carb.to work.I've taken it apart and cleaned it 3-4 times and no luck.
Can some one give me some pointers please.
I have; soaked in degreaser,shot carb.cleaner and ran wire through ports, compressed air through ports.Cleaned fuel tank, new fuel lines. Thank you.


#2

Lawnboy18

Lawnboy18

Is everything installed back together correctly? I recommend checking out a diagram.


#3

S

slyme

Thank you for the reply!.And yes,i do have another 17.5 parts engine, with carb.installd factory , that I went by.


#4

Lawnboy18

Lawnboy18

Do you have fuel spark and compression?


#5

M

mechanic mark

Post model xxxxxx, type xxxx, trim xx from engine data plate.

recheck model & type numbers, not coming up

https://www.briggsandstratton.com/us/en/support/manuals/results?NTT=287707-0225*

Amazon.com: Briggs & Stratton 799727 Carburetor Replaces 791886/698620/690194: Patio, Lawn & Garden just example, may not be your carburetor, with carburetor disassembled inspect all parts, either purchase a rebuild kit or new carb. making sure you have numbers handy so as to order correct part.


#6

S

slyme

Yes.I do have good compression (120psi)fuel,fuel tank,and lines are good and clean.Good spark aswell.It dose turn on when I drop fuel into carb.But wont stay on.
engine info; Mo;267707 Type:0225-01.Code:9511174B.
Thank you.


#7

Lawnboy18

Lawnboy18

It may just need an adjustment with the needles.


#8

S

slyme

how do I do that?


#9

Lawnboy18

Lawnboy18

There are screws on the carb that you can play with. You will have to check a manual.

Make sure gas is coming to the carb. Also, maybe your float is not working correctly in the carb.

So, before adjusting the carb, check that gas is going to the carb and that the bowl is placed correctly.


#10

S

slyme

ok.


#11

S

slyme

I've had carbs.in worst condition work after a good cleaning.I have no idea whats going on with this one.It seems as if im missing something.??? I just resoked it,rinsed with warm water,shot carb cleaner in all ports.Used shop air at all ports.And ,again,will only run on fuel added to carb.I did adjust the jet in and out ,No change.


#12

Lawnboy18

Lawnboy18

How about fuel!? Is any going to the carb?

That is my guess, because if runs if you poor gas. Something is wrong.


#13

R

Rivets

Would you please double check your model number, as I am not coming up with a 267707 model.


#14

I

ILENGINE

Rivets, try 287707-0225-01 and to the OP does the fuel solenoid on the bottom of the carb click when you turn the key on. There is no adjustments for fuel other than maybe the idle circuit jet, but that won't cause your problem. If you have clean fresh fuel in the carb bowl. then you either have a clogged jet up inside the emulsion tube area of the carb, or the fuel solenoid isn't working.


#15

R

Rivets

IL, that's the same number that I came up with. Unless I missed something, the OP doesn't tell us if he has the Walbro or Nikki carb. I'm guessing Nikki. If he has the Nikki carb, two things come to mind very quickly. One, that goofy gasket between the carb body and the float carrier has to be perfect. Two, if while reassembling you don't have everything lined up perfectly, internal air leaks will occur, which means no fuel flow. Finally, the float bowl spring must be installed to make sure the float assembly seals properly.


#16

S

slyme

Found problem!!! It turns out I had a short on the antibackfire solenoid that was not allowing fuel flow.
Thank you everyone for the help.


Top