Questions tagged [carburetor]

A device on an internal combustion engine that meters the flow of fuel at a particular dynamic rate into an internal combustion engine

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Engine sputtering when turning left [duplicate]

I have a 1988 Jeep Cherokee, and recently I’ve had this issue where whenever I turn left, the engine will sputter and sometimes go to nearly 0 rpm. I heard it could be an exhaust issue or a carburetor ...
Zane 's user avatar
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Engine only runs on full choke

Ford 390 Autolite carburetter Starts ok but only runs on full choke the two fuel needles don’t seem to make a difference. ( they used to be ok before cleaning). This carburettor did work ok, but I ...
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I have a new NIBBI racing carburetor for my 212cc

I just bought a new NIBBI carburetor for my 212 cc predator motor and the old one only had one line which was the gas line and this one has three so I’m not sure what to do with them one of the lines ...
Jonas L's user avatar
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Tune carb for short trips

I've got a Honda CB600S (CB600F II) from 2001. When I bought it, the carb was worn, causing it to run way too rich. Fuel consumption was absolutely terrible, see my previous post: Honda CB600S 2001 ...
Daniël van den Berg's user avatar
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How do I attach this carburetor part on an Evinrude 8HP?

We have an Evinrude 8HP outboard motor from 1996. It had been operating normally until yesterday, when the motor suddenly stopped responding to the throttle. When we opened it up, we found loose parts:...
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Is there a carburettor that will fit a Laro R11

I have just bought a Laro R11. I have found out that I can't get a carburettor or a kit for the carburettor. Does anyone know if there's another brand of motorbike that's interchangeable with a Laro ...
Tony Cini's user avatar
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2 answers
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Honda CB600S 2001 carb rebuild

I recently bought a 2001 Honda CB600S, with 35000km on it. Unfortunately fuel consumption has been terrible, and I drive roughly 1 liter per 12km. When taking it to a specialist in carburateurs, he ...
Daniël van den Berg's user avatar
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Holley carburetor flooding my engine

I am running a standard 600 CFM Holley carburetor on a Windsor 347 stroker engine. After running it hard one night the engine started to flood and became very hard to start. High amount of gas is ...
Chris Core's user avatar
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2 stroke motorcycle is fouling spark plugs after stator change

I got a 1998 Yamaha TDR 125 (4FU) 2 stroke motorcycle. It has a Mikuni TM28SS/1 flat side carburetor. I recently had to change the stator coil (the previous one burned down, due to wet conditions), ...
Erik Csipak's user avatar
1 vote
1 answer
230 views

Scooter wont start or idle without using choke

2007ish Honda activa doesn't start or idle without using the choke. It also bogs down or shuts off when giving 25% throttle (but runs fine with choke, tho it isn't good for the scooty) . I have tried ...
Knight King's user avatar
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Cannot locate broken part on maintenance diagram - YAMAHA 2018 XV250

The following part broke off the carb, and I don't know what it is and cannot locate it on the vehicle diagrams. As you can see, its just to the left of where the throttle cables attach, and just ...
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Ariens 911016 mower fuel intake problems

Started up mower this season after sitting all winter with fuel in the tank. Engine will start up for a few seconds very robustly and then sputter out. It was running last season, not perfectly but no ...
Nick Cherry's user avatar
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1 answer
316 views

What is the glue called sealing the joint between the air box and carb boots on motorcycles? What's an alternative?

I've got two older motorcycles, one 1992 and the other 1997. They've both got specifically shaped airboxes, and both connect to the carbs through four rubber boots, similar to those that go between ...
Matt Lacey's user avatar
1 vote
2 answers
295 views

Air filter turned black due to exhaust manifold leakage

Hi. As can you see my new air filter(that was original yellow color)is turned to black after only 2000 km due to a leakage in the exhaust manifold,which caused the burned gases(probably unburnt gases ...
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What does a throttle valve actuator do in carburetors?

i tried looking online but could not find much information about throttle valve actuators in carburetors. I think they look like this part in the picture below circled in red. What is the purpose of ...
Timothy Scherer's user avatar
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Coleman CT200U EX starts when dies

I initially was putting a new carb on but decided to just keep the stock one. I have put it all back on. But when I started it it instantly when full throttle. So I did some research and learned about ...
Zeus's user avatar
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On carbureted vehicles, are vacuum lines exposed to gasoline vapors?

I'm restoring a 1985 Chevy G30 Van 5.7L, but these questions apply broadly to carbureted vehicles. The vehicle is carbureted, and most controls for the emissions system and climate control system are ...
JoseOrtiz3's user avatar
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Two stroke engine with unreliable idle

I am currently restoring a Partner 22 GBI leaf blower and facing some weird issues. I have removed the carb, cleaned it in the ultrasonic and restored everything to factory settings. After running ...
Yanick Salzmann's user avatar
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Does a new small-engine carb need to be adjusted?

(Stihl FS55 string trimmer) After years of regular use, the engine degraded fairly suddenly to barely keeping alive, uselessly low power, and running very rich. For reasons good or not, I decided to ...
George's user avatar
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What could this part be circled in green of this Bizzarini 5300?

The Bizzarini 5300 GT has the Chevrolet 327 l76 small block. In some versions it has the 4 barrel holley and it looks like the regular l76 327 from chevrolets of the day but when they put 4 Weber DCOE ...
Timothy Scherer's user avatar
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Motorcycle poor acceleration

I have a Yamaha V-Star 650 that bogs down when I try to accelerate. My first thought was the carbs, but she revs just fine with the clutch engaged. I don't think that was the case the last time I had ...
Phil Loden's user avatar
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Audi 100 C3 engine stops mid drive

I have an Audi 100 C3 from 1985 (66kw). It has a carburetor, which is tuned automatically. On random occasion engine stops working mid-drive. This usually happens 2-3 minutes into the drive- engine ...
Kaarel Allemann's user avatar
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Royobi BP42 took off carb cleaned and new fuel lines now starts idols then shuts off but restarts again ould it be gasket where vacuum hole is

Removed carb cleaned reassembled with new fuel lines starts runs for awhile and dies but restarts gasket vacuum hole may be leaking
James Peters's user avatar
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Is turning off the engine when stopped at traffic lights bad for the car?

What (if any) mechanical issues will be caused if a person regularly turns off their engine while stopped e.g. a traffic lights? Assuming regular production gasoline-only (non-hybrid) cars as they are ...
bharal's user avatar
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Do carburetors protect intake valves from carbon deposits?

For a long time, most car engines were using multi-point port injection that sprays fuel directly at the intake valves. Today, engines are increasingly commonly direct injected. A problem of direct ...
juhist's user avatar
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Why doesn't my engine rev up when closing choke valve?

So I just installed a manual choke cable on my Mustang 1967 (Holley carb 4 bbl), and upon startup I pull the choke and see the valve close but the engine does not rev up at all. I go as much as to ...
Omar Khoali's user avatar
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1 answer
538 views

How to identify a carburetor by measurements

I have looked for {model} carb, I have searched the numbers and letters stamped onto the carb, and I finally resorted to measuring it to just try to find a compatible one based on the size (28mm for ...
Cfomodz's user avatar
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I have a 1983 ford f250, can i straight pipe it?

I have a 1983 ford f250, and I want to know if I straight pipe it, will it mess with my carburetor?
Aaron's user avatar
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Carburetor not drawing fuel from tank

So the title is kind of generic, but I am facing a bit of a weird situation. I am going to explain it first, but I also have some pictures at the end that might help. I have bought a cheap 2 stroke ...
Yanick Salzmann's user avatar
2 votes
2 answers
571 views

What causes the noise when carburetors are out of sync?

When carburetors are not synchronized, the engine does not sound smooth. At first I thought this is because the frequency of each piston is different, but I guess that is not possible, since they are ...
Andrej's user avatar
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Does a carburetor have constant fuel mass flow, constant liquid volume flow, or constant molecule count flow?

I have a generator with carburetor. It seems to consume a bit more fuel than I expected, 0.44 liters per hour for 386 watt production, or 1.14 liters per kWh. I'm also bit more annoyed by the exhaust ...
juhist's user avatar
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4 votes
1 answer
224 views

If I start a previously unfueled small engine, do I keep choke on for first pull only or until it starts?

I purchased a small engine inverter generator. It obviously has a carburetor and a choke valve. I just put in the oil and oiled the foam air filter element and am ready to break in the generator with ...
juhist's user avatar
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Is it possible to swap the carburetor of a Briggs & Stratton 5hp?

I want to use a 5hp Briggs & Stratton engine for a kart project. That engine is based on a carburetor that is above the fuel tank, pumping the fuel thanks to the diaphragm. I am thinking about ...
fallais's user avatar
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2005 Suzuki katana 600 carburetors not delivering fuel

I have a 2005 katana that was given to me I cleaned the carbs and it ran ok. I was riding it for a few weeks then overshot a corner and crashed, the damage wasn’t too bad scratched some plastics and ...
Nicholas's user avatar
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My bike is dying on random

Okay so I’ve had this bike (2004 gs500) for roughly two weeks and it’s ran perfect. Today I was riding with perfect preformence when I throttled and noticed it waited a second before doing anything ( ...
Matthew king's user avatar
1 vote
1 answer
67 views

Gas Generator Stalls Every Few Seconds

This is a Champion Global Power Equiptment 9000 Peak Watts/7000 Running Watts (Gasoline) 8100 Peak Watts/6300 Running Watts (LPG) Electric Start Dual Fuel Generator. The following is a video of what ...
user65325's user avatar
1 vote
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301 views

32/36 Weber carb MGB dies when accelerating but when the progressive second butterfly throttle valve opens it revs fine at high rpm

i have a 1977 MGB with a 2 barrel progressive throttle 32/36 Weber carb. it will idle, but if i try moving at low rpm, the engine will jolt on and off. like if i was pressing the gas but rapidly ...
Tony's user avatar
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2 votes
1 answer
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Is my mixture too rich?

I've been running this single cyl scooter with this plug to about 30K KM (~19K miles). Replaced it today and it seems a bit dark. Is the engine's mixutre too rich? enter image description here
BlackNinja's user avatar
-2 votes
1 answer
101 views

Regular carburettor vs chainsaw carburettor

Could someone explain their differences? By regular carburettor i mean the one which you usually find on motorbikes
Stelios Liakopoulos's user avatar
1 vote
1 answer
156 views

I have a 1999 yamaha r1 and it bogs out really bad

So I've cleaned the carbs twice on this bike and its like it's not getting enough fuel because it will only run on starting fluid and I've cleaned the tank and got new hoses and still the same problem ...
Justin Millerrr's user avatar
0 votes
1 answer
1k views

Wood chipper engine won't start after being turned on side

I have a Merry Mac LSC wood chipper (similar to https://www.mackissic.com/product/mighty-mac-leaf-shredder-chipper-lsc/). I made the mistake of turning it on its side to remove debris from the blade. ...
zwiebelspaetzle's user avatar
1 vote
0 answers
197 views

1987 Yamaha Riva XC125 starts high then falls to low rpms and stalls out slowly after a rough idle

Intro: Hi guys, I wanted to start by letting you all know that I'm new to motorcycles and just vehicle repairs in general and this is my first bike. I believe I have reached the point where my lack of ...
user60826's user avatar
1 vote
0 answers
759 views

Gas leaking from carburetor while ATV not running

I bought a Coolster (chinese) atv for my daughter and had to do some extensive work on it. But finally got it good as new, until today. I pulled the atv out of the shed for us to ride and started it. ...
C_HAD89's user avatar
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1 vote
1 answer
2k views

Engine runs with carburetor's idle mixture screws closed [duplicate]

I have a Rochester Quadrajet on my boat and have been attempting to tune it. It seems that I'm getting too much fuel in with my mixture as I'm blowing black smoke. If I close the mixture screws ...
Ryan Griffith's user avatar
1 vote
1 answer
319 views

Engine hesitating to start when clutch pedal is pressed

Recently I started noticing a weird problem with my car (Maruti Alto LXI 2009, Manual petrol with carburetor) that when I press the clutch pedal and the car is in gear it hesitates (it cranks but not ...
Nilabja's user avatar
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0 votes
1 answer
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Plenum in air intake system of automobiles

What is a plenum? What role does it play in the air intake system of cars?Do naturally aspirated engines use plenum?
Isha Roy's user avatar
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1986 Dodge B250 - sudden fast idle and low "thudding" sound from exhaust

My 86 dodge van with the 318 engine recently acted up shortly after starting. This is a carburetted engine with an automatic transmission. I was letting it sit at idle to bring the engine up to ...
Cameron Roberts's user avatar
2 votes
2 answers
686 views

Vacuum never decreases while leaning out carburetor mixture

I have a Rochester Quadrajet 4MV carburetor that has 2 mixture adjustment pins in the front of the carb. As I understand it, you tune these by continually tightening the mixture screws while watching ...
Ryan Griffith's user avatar
2 votes
0 answers
63 views

Carburetor adjustment ordeal: always rich on mid/high revs

So I'm trying to adjust a soviet K-22G carburetor which was placed long time ago in a Chevrolet 235 6L engine. It "works" but I don't seem to find the right spot to make it run as it should. ...
Aram Alvarez's user avatar
1 vote
1 answer
197 views

Motorcycle V-Twin CV carbs riding poorly on 1/4-3/4 throttle after carb rebuild

Background: The bike Suzuki Intruder VS1400 model 2000, ran fantastic, but started to stall on idle when I used old fuel in it. What I did: I cleaned the two CV carbs. Didn't replace anything. I found ...
Aus's user avatar
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