HELP! How to open this carburetor cover??

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Sep 7, 2007
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157
Location
Oakville, Ont., Canada
I took off the carburetor on my B/S lawn mower for cleaning but couldn't figure out how to open the cover on the bottom. I have tried to pull open and turn open but no luck. Since it's made of plastic, I don't want to use too much force to avoid damage. The carburetor model seems to be C144416/592318. Any advice would be appreciated! TIA!
 

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Thanks a lot guys! With a bit more patience and a plastic pryer, I managed to open the cover. But it seems it’s an all-in-one unit, not much I can clean here.

i sprayed some carburetor cleaner fluid and pray it will fix the starting problem.
 

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In the second pic, make sure you spray some cleaner in that little jet in the white thing hanging down.
 
Alright guys. After spraying the carb cleaner and putting it back, the fuel starts to flow.

But, now the problem is that it keeps flowing so that the combustion chamber is flooded. Also the fuel is coming to the air filter area.

what should I do now? The float? I’ve drained the gas again, thinking this is a danger situation. Please help!
 

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Alright guys. After spraying the carb cleaner and putting it back, the fuel starts to flow.

But, now the problem is that it keeps flowing so that the combustion chamber is flooded. Also the fuel is coming to the air filter area.

what should I do now? Please help!


It sounds like you have lost the needle in the float bowl or have contamination on the needle or seat.

The white float on the bottom will have a small needle that is vertical that will stop fuel flow when the float bowl is full. As the float bowl drains the float falls down allowing more fuel in. I'd start there.

Just my $0.02
 
It sounds like you have lost the needle in the float bowl or have contamination on the needle or seat.

The white float on the bottom will have a small needle that is vertical that will stop fuel flow when the float bowl is full. As the float bowl drains the float falls down allowing more fuel in. I'd start there.

Just my $0.02
Thanks. I didn’t touch the floater last time but took apart the carb again anyway. Cleaned the pin/floater/needle and put back. Still the same problem. What could I have done wrong?
 
It might be too late now, but you should disassemble the whole carb to clean it thoroughly. The white plastic thing in the carb pulls out and you can spray the other nozzles that are in there. And, you can pop that little metal bar out and the float and needle will come out and you can clean that area. Try that before commiting to a new carb.
 
Overflowing must be a problem with the float and needle. When you hold the carb upside down (so the float drops toward the top, simulating having the bowl full) it should not be possible to blow air into the fuel inlet.
 
It might be too late now, but you should disassemble the whole carb to clean it thoroughly. The white plastic thing in the carb pulls out and you can spray the other nozzles that are in there. And, you can pop that little metal bar out and the float and needle will come out and you can clean that area. Try that before commiting to a new carb.
Yes I slid off the pin, sprayed cleaner into that tiny passage the needle covers. Also cleaned the needle and the plastic float before putting them back. Didn’t seem to help, though.
 
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Overflowing must be a problem with the float and needle. When you hold the carb upside down (so the float drops toward the top, simulating having the bowl full) it should not be possible to blow air into the fuel inlet.
I just performed this air blow test.

if the carb was upright, I could easily blow air into it;
If it was upside down, it would be a lot more difficult to blow. But not sure if it completely blocks the air.

Does that mean the needle is fine? And could be the float not floating as expected?
 
If the gas was flooding out the engine with it off, then something in the float/needle/seat assembly was definitely the problem. If upside down, you shouldn't be able to blow air through it (by mouth).
 
Hello. Apologies for bumping a 4 year old thread.

Today my 2018(?) vintage Craftsman mower cut out mid way thorough a job which I finished with my riding mower. The past few mows its been sputtering a bit but eventually evened out. Turns out I have the same or similar plastic designed carb.

I cleaned the mess out of it with carb cleaner and reinstalled it and its running better now. I went ahead and drained rotella T4 15w40 which looked metal swirl-ish. I think I only mowed 4-5 times or so this year with it. I'm not happy. I put back in a mix of Total Quartz 0w20/5w40, and a new air filter is on order. I've found a new OEM carb for $60-70, but i'm on the fence at this point.

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Thanks a lot guys! With a bit more patience and a plastic pryer, I managed to open the cover. But it seems it’s an all-in-one unit, not much I can clean here.

i sprayed some carburetor cleaner fluid and pray it will fix the starting problem.
Pull it apart like the other guy did and make sure you pull that oval shaped white plastic thing out of the bottom of the carb and spray that with carb cleaner, use the carb cleaner to really blast out the passages in the white oval and up inside where the white oval goes with the carb cleaner.
Mine was running bad so I gave it one glug of techron fuel system cleaner and that stoped it dead. It softened the varnished gas and turned it into gasoline bugers which plugged up the carb. Disassembly and a good blasting of carb cleaner got it going good as new.
 
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