Small Engine Problems? Ask an Engine Mechanic for Answers ASAP
Greetings, My name isXXXXX and I am here to help the best I can. My goal is 100% satisfaction. Let's get started.
to start, here is a complete parts breakdown for your unit including the engine
It is possible that the spring on the wind vane governor / throttle shaft is not mounted correctly
or it is not adjusted to the correct tension
This group of service manuals will HELP you to figure out what you did wrong
it is also very possible that you missed a tiny hole in the carburetor
that is still clogged
no, I can not tell you which one
but your are still describing a carburetor problem
my guess is that if you keep priming the engine it will keep running
but then you risk damaging the engine because the governor is not controlling the speed
also, check to make sure the butterfly on the throttle shaft is STILL fastened
Oten this little screw falls out and the butterfly just falls down
Let me know what you learn
It looks like you may have entered the question twice
but I assume you may have accidentall y entered you email address in the other account wrong so I copied the answer here
Accept here when you are done
but be careful not to accept both locations
Make sure that I was only charged ONCE for this service.
or you will get doubled billed
The butterfly is still fastened, you push it in thru the slot on the shaft. The throttle cable does not move
the butterfly at all.
does the throttle cable actually move on both ends?
It moves a slide on the top of the carb, but the butterfly doesn't rotate at all.
My suggestion at this time is for you to DOWNLOAD the service manual and Look at the way things are hooked up
then the tension on the spring is all wrong
or it is installed wrong
What hole in the carb may still be plugged, and how to I clean it out?
the service manual will give step by steps with photos
how did you clean it before?
did you SOAK it, or just spray it?
I took off the fuel bowl, then soaked in a bowl of water with Dawn dishwashing soap, to remove any oil or greasy residue, then I rinsed it off very well.
OK, so you made it shiny, but did not really do anything
I will give Some general instructions I typed out for another customer
Used a toothpick to scrape out as much of the gunk that I could see, but don't know if I missed anything inside.
then I will modify the instructions to make it
more suitible for the lawn boy carb
if you could see ANY gunk as in gum and varnish
then the WHOLE carb would need to be disassembled completely
then the METAL PARTS
would need to be soaked i a carb cleaner bath
do NOT soak plastic parts because the carb cleaner will eat them and turn them into gooo
As engines sit or get older, fuel that is left in the carburetor can turn to gum and varnish and cause this and other problems.
Also, any gasoline that was left in a gas can for a period of more than 30 days must be discarded because it also has begun to turn to varnish.
Today's gasolines contain MTBE and alcohol. (Ethanol) They turn to "Junk and garbage" very quickly. Alcohol absorbs water. And they call it "Oxygenated fuels! It is the oxygen (and the water) that breaks down the organic compounds in the fuel and turns the gas to "Garbage" (Gum and varnish) The fuels we had just a few years ago had no alcohol in it and would store for longer periods of time before going stale.
Fuel stabilizers do almost nothing to prevent the fuel from going bad with the changes in today's fuels. The whole point of a fuel stabilizer is to form an oily film on the surface of stored gasoline whether in the tank or in a gas can. The idea was to keep oxygen away from the gasoline to prevent breakdown. Since the fuel is already oxygenated, the fuel stabilizer concept is null and void. These fuels start to degrade immediately upon the addition of the ethanol.
Do not buy gas from the "Discount" Stations. The discount stations get a reduced price on gas because they may be buying fuel that is nearly 30 days old already. You may be getting fuel that's nearly stale right from the pump when buying from a discount station. Purchase your fuel from the well-known stations such as Shell, BP, Sonoco, Phillips 66 etc.
More than 70% of all of our repairs in our small engine repair business are due to these same issues. You most likely have dirt, gum, varnish...etc in your carburetor plugging up the small passageways and jets in the carburetor.
The carburetor will need to be cleaned and overhauled as well as the rest of the fuel system.
In an Emergency such as a blizzard where you cannot get out to buy a carburetor kit until the plows come through, or during an emergency power outage and you need a generator running even if it runs poorly, you might try the following if your carburetor is the type that has a bowl. Sometimes this procedure works:
While the carburetor is still mounted to the engine:
You may be able to finish the job at hand then clean and overhaul the carburetor correctly when you have more time and a new carburetor overhaul kit.
The nut that holds on the carburetor bowl has several small holes in it. Some are on the sides and one may be in the end. In order to completely clean the carburetor correctly, you Must clean these holes with a tag wire or a jet drill. (If a jet drill is used, DO NOT use a drill that is bigger than the hole or the engine will run too rich.)
If you don't feel comfortable with these kinds of repairs, or if the carburetor still doesn't work correctly after your attempt, I would suggest sending it to a profession repair shop with a reputation for having friendly, knowledgeable, experienced service technicians. It would be best to take it to someone who has an "Ultra-sonic" cleaning machine. This machine uses a very mild carburetor cleaner in concert with ultrasonic vibrations to get the very small passageways clean. This method is very effective even when traditional methods fail.
Here is where you can get an inexpensive "Ultrasonic Cleaning Machine"
There is a New Product that you can try which is guaranteed to work or your money back (per the manufacturer).
It is designed to help clean the carburetor without damaging the diaphragms and rubber parts like regular carburetor cleaner. Click on this site and it will tell you all about it. http://www.b3cfuelsolutions.com/html/mib.html
The mechanic in a bottle is NOT a conventional carburetor cleaner.
It actually breaks down the varnish into it molecular components and it completely dissolves. It DOE NOT clog up the jets as conventional carburetor cleaners do. Conventional carb cleaners just loosen the varnish and the varnish particles will go into the jets and filters and clog them up.... usually causing much more problems that was originally there. The conventional carb cleaners also will loosen the "GUMK" that has formed in the gas tanks and cause all of that gunk to go through the carburetor as well.
The Mechanic in a BOTTLE is a completely revolutionary product that will in many cases alleviate the need to tear the carburetor down and rebuilt it..... unless there is mechanical wear and tear that would require that parts be replaced.
In addition, the special formula actually is designed to soften and restore the rubber parts in the carburetor such as the needle and seats and gaskets.
Mechanic in a bottle is NOT a cure-all but it can help customer get going in many cases without them having to tear the carburetor apart. If the customer is NOT mechanically inclined, it might save them a trip to the repair shop.
Yes I was very skeptical about this product when I first was introduced to it, but the Distributor demonstrated it and we have tried it on many occasions with terrific results.
Otherwise you will have to clean and rebuild the carburetor.
Please feel free to ask follow-up questions so that we can always arrive at the correct solution. We want you to be 100% satisfied.
Well, I replaced the main needle and seat that hang off the float, I disassembled the carb as far as I could tell, the main body is a one piece plastic body
YES, that I forgot
that will be a bit more difficlut
I was just looking at the carb for this engine
I went to the service school for this engine when I was 12 years old
I am 50 now, so do not work on them that much any more
You do NOT have a D series engine
and if the muffler is under the deck
Is the throttle cable supposed to rotate the butterfly, like I think it should?
then you have an F series engine
Let me remember
throttle cable may just add more tension to the spring
but let me chack
There is a "vane" on the top of the butterfly shaft. The spring holds the butterfly wide open. Is there too much tension in the spring? Maybe I have to "unwind" it one rotation?
look at this link
I have verified the throttle cable will change the spring tension
Nope, that is the 1993 model, I believe that I have the 1994 model year.
will not be a ton of difference
but look here
this is an example of one of the documents that you will load from the service manual links
I did not look to see if I had the exact right car
I just wanted you to see what the doc was like
so you would go here
This looks pretty similar.... Let me look for a minute.
so you would know what you are missing
look at the service manual, then I would be glad to
answer follow ups and replies
there are sections on the carb
sections on the governor
you need to open a few docs to find the one that comes closest to the carb and gov that was ON your engine
lawnboy was not so good at making sure the parts diagrams told us which carb you have
plus, often the carbs got replaced
and do not wish to assume you have the original carb
I believe that it is the original carb.
but, I think we have you started, then you can review the cleaning procedures
and the governor adjustment procedures
then I will be glad to answer follow ups
I will be notified via email of your replies
It looks like I'm missing the speed control lever.
Which would explain why the throttle control doesn't change the position of the butterfly.
THAT would do it
and would be impossible for me to see via remote control
hence the photos and diagrams
And worse yet
there will be little to hold the throttle to the right setting
I was not trying to abandon you
I just Knew you had enough to solve the puzzle
just needed some study time