Question about Craftsman Garden

Open Question

I have a sears craftsmen lawnmower with a 6.75 hp #640020B Tecumseth carb and my problem was that the float pin would stick and my engine would flood with gas. My solution was just to buy a new carb and replace which I did but now it runs way too fast and I need to know how to adjust for this speed.....please help.

Posted by on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: hard starting and poor running

Hi,

Try running the engine without the filter and check if the idle would smoothen, maybe a little high. If problem persist, then it would be fuel delivery problem. If the idle is constant (but high), then some sort of blockage on the air filter or a vacuum leak.


Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 10, 2008

  • 376 Answers

SOURCE: craftsman lawnmower carb pours gas

One of two problems. your needle and seat is leaking or the float has a hole in it

Posted on May 30, 2009

steve_lima
  • 181 Answers

SOURCE: I have a Brigs&Straton 6.5 Quantum lawnmower will not stay running. I can keep it running by restricting the amount of air entering the carb with my finger (choking it) The mower will start if it

the problem is in your carb.,at the bottem of the carb. there is a bolt that threads in to the carb.pinch off the fuel line so that no fuel comes out after the fuel bowl is off the mower.now look into the bolt that you took off.there should be a hole oppisit the head of the bolt.there are also two holes that go through the sides.these holes are the fuel intake to the carb,the hole in the center is the fuel nozzle.most likely you have dirt blocking this hole and not letting the motor get enough fuel to run.thake some carb cleaner and spray it in the hole.take an air hose then blow the nozzle out.while you have the screw out take the bowl off and check to see if there is any water or dirt in the bowl.after cleaning.reinstall the bowl and start mower again.should be running ok now.if not let me know and i'll guide you through another fix.let me know if this helped or not................

Posted on Jun 02, 2009

  • 1 Answer

SOURCE: mower surging

let it surge, it will usually get better as it warms up. These 6.5 Hp engines are fine except they have an cheap badly designed carburator. Nothing can be done about this problem. They all surge eventually.

Posted on Jun 16, 2009

panilling9
  • 284 Answers

SOURCE: 4.5hp Sears/Tecumseh motor starts and dies in 5 - 10 seconds.

metal or plasic float?

Posted on Jun 21, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Lawnmower leaks fuel from carb


It sounds as though your float and needle are stuck open or not closing properly, thus flooding with fuel. However it is hard to give exact fix/problem without a model number of the engine to be able to see the specs and design of the carb.

Aug 27, 2014 | Garden

1 Answer

My 19hp engine is flooding out the motor. if i take the bottom line off the carb it will run for a minute or more and then die. with the line on it floods immediately


Sounds loike the float is either stuck open or there is dirt in the carb. You might want to take the carb off, remove the float bowl, and inspect the float and needle valve. Spray the carb with carb cleaner, especially where the needle valve seats and all of the passeges inside. I would suggest getting new gaskets because the old ones usually break when they are removed. I hope this helps, Good luck.

Jun 14, 2014 | Briggs & Stratton Briggs Stratton...

1 Answer

The engin will start and turn off. Then will not turn on at all.


Im not sure if your saying it wont restart or not even turn over. If it wont start but turns over it sounds like the carborator float may be sticking and flooding out the motor. If this is the case normally after leaving it sit awhile it will drain down and you will be able to restart mower. If your not a do it yourselfer a small engine mechanic would be able to take the carborater apart and clean the jets and or replace a float that may have gotten a pin hole in it. You could try spraying in a small amount of carb cleaner in carb when running to see if it cleans jets.

Apr 14, 2012 | Honda 8 HP Engine

1 Answer

Raw fuel coming from muffler when i crank it it is a 16.5 hp kohler eng


Typically this is caused by a sticking float in the carburator. It's essentally flooding itself out. You can take apart float bowl and clean the carb. For the float specifically, remove the pin that hold the float on and then remove the needle valve below that. If you want to go all out and do it right, get yourself a carb rebuild kit. They are very inexpensive and easy to do yourself

May 13, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Flooding in carb....how do I check the float?


Take the carb off and remove the screws that hold the float on. Once you have that apart, the float should be pretty obvious. Toward the back of the float (where it hinges) there is a small spring and a pin. Orientate the carb in it's normal position the float should be freely in the down position (this is when fuel enters the carb.) the pin should be pushed up. Now, push the float up (this is when fuel stops coming into the carb). The pin should fall. There should be some tension (very little) that makes the float want to return to the down position. If anything is out of order, order a carb rebuild kit. If the carb is flooding, this means that the float is getting stuck in the down (open) positon and not floating. This happens very often with older floats. Newer ones are plastic and won't get fuel logged or covered in suit. Let me know if this helps and what happens. Good luck

Sep 27, 2009 | Craftsman 20 hp 42 in. Deck Lawn Tractor -...

2 Answers

I have a sears lawnmower that was flooded recently. I bought a tune up kit and installed it. I changed the gas and oil also. when I poured in the gas it all came out the air filter. What should I check...


carburator float is stuck in the open position allowing fuel to continiously run / drain out the fuel tank into the carb and then overflow into the venturi of the carb into the engine and out the air filter. Bottom line the carb needs to be disassembled cleaned and rebuilt

Sep 20, 2009 | Craftsman Garden

1 Answer

Engine was flooding out\now fuel primer has to be used to run


recheck float level as well as needle and seat for sticking and or damage, just crack line to bleed air , and eventually it self bleeds anyway... also unless you replaced with new floats check float weight with a float scale to see if floats are saturated or have fuel inside making the heavy and inaccurate ...

Aug 04, 2009 | Boating

1 Answer

Why is my 4.0 crafrtsman lawnmower flooding gas into my airfilter


float is sticking in the carb. Pull carb clean holes with paper clip put back together.

Jul 19, 2009 | Craftsman Garden

2 Answers

Cannt start 360v/8 dodge cw two barrel Holley floods badly


your needle jets on the float may be sticking or could have come loose from its retainer pc.

Nov 08, 2008 | 1983 Plymouth Gran Fury

Not finding what you are looking for?
Garden Logo

Related Topics:

65 people viewed this question

Ask a Question

Usually answered in minutes!

Top Craftsman Garden Experts

Dean Gruber

Level 2 Expert

110 Answers

Roland W VanLue
Roland W VanLue

Level 3 Expert

486 Answers

Dennis Key
Dennis Key

Level 3 Expert

2475 Answers

Are you a Craftsman Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...