Small Engine

Small Engine Troubleshooting Problems? Ask a Mechanic Now.

Ask an Expert,
Get an Answer ASAP!

I have a GP6500E that sat for 2 years with gas and

Customer Question
I have a GP6500E...

I have a GP6500E that sat for 2 years with gas and stabilizer in it. I tried to start it, but it just cranks. I replaced the old gas by draining and refilling, and draining again. I replaced the fuel filter, spark plug, fuel lines, and have cleaned the carburetor. Now, it will start briefly, until the carb spray runs out, but will not stay running for more than a few seconds..

Mechanic's Assistant: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?

New fuel and the valve is open.

Mechanic's Assistant: Do you plan on doing the work yourself?

Yes, unless it is extremely involved.

Mechanic's Assistant: Anything else we should know to help you best?

The unit was purchased, set up and started, run for about 15 minutes, and stored with stabilizer in the fuel. It has been kept, covered, in a heated garage. For all intents and purposes, it is a brand new unit.

Submitted: 11 months ago.Category: Small Engine
Show More
Show Less
Ask Your Own Small Engine Question
Answered in 4 minutes by:
9/8/2017
Technician: Hank F., Technician replied 11 months ago
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,993
Experience: Certified on Onan and Generac generators
Verified

Hello, my name is ***** ***** I am going to assist you with this.

This is a classic symptom of a carburetor that has become plugged with varnish.

As gas gets old, it turns to varnish and clogs up the passageways inside the carburetor, not allowing enough gas to get to the engine.
This condition is cumulative. Every time gas sits, the varnish builds up just a little more, like coats of paint, until eventually gas can not flow. It will not happen overnight, but the symptoms can show up all of a sudden, even while simply stopping to refill with gas.
The use of fuel additives, such as Sta-Bil or Sea Foam will not stop this process from happening. They will greatly slow it down, but the gas will still go bad.

When this happens, either the engine simply will not start, or it will not run without the choke on (this reduces the amount of air getting pulled into the engine, changing the fuel/air mixture), or it will run but surges.

Another issue that varnish in the carb can cause is that the varnish may not allow the float needle to seal properly against the seat, causing the flow of gas to not shut off when the bowl is full. The result will be gas overflowing the carb and running into the cylinder, and possibly out the air intake. If the gas gets into the cylinder, it will seep past the rings and down into the crankcase. This will be evidenced by your oil level being over-full and/or the oil smelling like gas.
If this is the case, you will need to change the oil and filter, if it has a filter.

The only 2 solutions are to either replace the carburetor or give it a good, thorough cleaning.
When removing the carb, make sure to take a good picture, or make a good drawing of where all springs and linkages are attached. This will make reassembly much easier.
Most people believe that cleaning a carb involves removing the bowl and wiping it out, then spraying some carb cleaner through it.
This is simply insufficient. It takes months or years for this accumulation to build up – it just can not be removed in minutes.
To properly clean the carb, you must remove it, disassemble it (making sure to remove all non-metal parts), and soak it in a commercial solvent for several hours. Soaking it overnight is even better.
Then clean all solvent off with a spray type carb cleaner, making sure to get lots of cleaner into every hole and passage there is. Pay special attention to the tiny holes in the bore of the carb, under the throttle plate for the carbs that have these holes. Use lots of cleaner. And make sure to wear safety goggles to avoid getting the over spray into your eyes. There will be over spray.
Dry the carb with low pressure compressed air.
This is an EPA compliant carburetor, and as such, is not supposed to be taken apart or adjusted.
When you have an issue with it, you are supposed to replace the entire carb.
But, sometimes it is possible to clean them. Just remember, that as an EPA compliant carb, there are no parts available for it, so if you lose or break anything, you will definitely need to get a new one.

Occasionally, even a good cleaning is not going to be sufficient, and you may end up having to replace the carb anyhow. Be prepared for this.

Personally, I do not recommend trying to clean this carb. I recommend replacement.

Ask Your Own Small Engine Question
Technician: Hank F., Technician replied 11 months ago

Was this what you wanted to know?

Ask Your Own Small Engine Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Hank F. Your Own Question
Hank F.
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,993
15,993 Satisfied Customers
Experience: Certified on Onan and Generac generators

Hank F. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Curtis B.

Curtis B.

Technician

15,517 satisfied customers

have worked on and around most engine models for 35 yrs./Polaris ATV expert

Rick

Rick

Factory Authorized Trainer

4,218 satisfied customers

Outdoor Power Equipment technical trainer since 1990, covering eight states.

Jon K.

Jon K.

Small Engine Diagnostic Expert

2,995 satisfied customers

Gold certified Stihl tech, Service Manager for a rental/repair shop.Certified in most small engines

James W

James W

Small Engine Troubleshooting Expert

2,986 satisfied customers

7 years as Mechanic & Parts Manager for Brother who has Owned Lawn & Garden Repair shop for 35 years

Vince O.

Vince O.

Small Engine Technician

2,927 satisfied customers

Over 30 years experience repairing lawn and garden equipment. Chainsaws, mowers,blowers and trimmers

Wayne

Wayne

Engine Rebuilder

2,041 satisfied customers

many years on egine rebuilding, lawn mower,roto tiller,Truck,and small engines

RUSS

RUSS

SERVICE TECHNICIAN

1,723 satisfied customers

28 YEAR SERVICE TECHNICIAN

< Previous | Next >

Related Small Engine Questions
I have a new troy bilt push mower. only use it one time last
I have a new troy bilt push mower. only use it one time last year. however, I can't get it to start now. Please advise. … read more
Donald
Donald
Owner / Technician
High School
2,591 satisfied customers
Won't start. Old gas in it, Shut off valve open. Some gas in
Shut off valve open. Some gas in tank, not too much … read more
Hank F.
Hank F.
Technician
High School or GED
15,993 satisfied customers
I have a tractor Craftsman 1100 model 917.272084. It has a
I have a tractor Craftsman 1100 model###-##-#### It has a Kohler 17 HP engine. Issue is, starts fine, will run perfectly for about 15 minutes, then idle starts going up and down, then stalls out. Won'… read more
Donald
Donald
Owner / Technician
High School
2,591 satisfied customers
Riding mower wont start - suspect carburater : I siphoned
I siphoned the old fuel and put in fresh fuel, changed the fuel filter, spark plugs … read more
Donald
Donald
Owner / Technician
High School
2,591 satisfied customers
Brand new time master 30" (< 3 hours operation) stopped
Brand new time master 30" (< 3 hours operation) stopped in the middle of mowing. Was not out of gas. Oil was added at setup, 93 octane gas used, with stabilizer. Cannot start it.… read more
Donald
Donald
Owner / Technician
High School
2,591 satisfied customers
we have Craftsman 190cc* Briggs & Stratton Gold Engine, 22"
we have Craftsman 190cc* Briggs & Stratton Gold Engine, 22" Front Drive Self-Propelled EZ Lawn Mower and haven't used in almost a year. just two years old. will try to start but won't keep running, an… read more
Briggs-Fan
Briggs-Fan
1,278 satisfied customers
brand new husky portable generator (1850 watt). Actually
brand new husky portable generator (1850 watt). Actually purchased over a year ago, never taken out of the box till this morning. It is a Briggs and Stratten engine. It has fresh fuel, fuel lines are … read more
Hank F.
Hank F.
Technician
High School or GED
15,993 satisfied customers
I have a honda hs621 snow blower which I recently bought used.
I have a honda hs621 snow blower which I recently bought used. It had sat for 2 years with gas in it. I drained the tank and took the carb bowl off to find rusty sediment on the float and in the bowl.… read more
RUSS
RUSS
SERVICE TECHNICIAN
Vocational, Technical or Trade Scho
1,723 satisfied customers
I have a 15hp kohler in a jd lawn tractor sat in garage all
I have a 15hp kohler in a jd lawn tractor sat in garage all winter and now wont start. spark plug is fouling out with gas. i suspect a problem in carb any help would be great thanks. the engine was ba… read more
Jon K.
Jon K.
Small Engine Diagnostic Expert
Some College, military training,
2,995 satisfied customers
I have a riding mower with 19hp B&S V-twin engine that recently
I have a riding mower with 19hp B&S V-twin engine that recently started flooding out when starting up. It will run briefly then quit. I replaced both plugs and it did not help. After I let it dry out … read more
RUSS
RUSS
SERVICE TECHNICIAN
Vocational, Technical or Trade Scho
1,723 satisfied customers
Engine on my power sprayer wont start. Replaced spark plug,
Engine on my power sprayer won't start. Replaced spark plug, checked oil, made sure fuel line wasn't blocked and am using fresh fuel. Engine will start briefly with starter fluid but then just dies. E… read more
RUSS
RUSS
SERVICE TECHNICIAN
Vocational, Technical or Trade Scho
1,723 satisfied customers
I have a Simplicity Riding Mower with a 15 hp Kohler engine.
I have a Simplicity Riding Mower with a 15 hp Kohler engine. It starts and runs until the engine warms up. It thens starts to spit and sputter as if it is stalling for fuel. Have done the spring tune-… read more
Curtis B.
Curtis B.
Technician
Associate Degree
15,517 satisfied customers
Toro wont start. Sat for 12 years. Gas drained before storage.
Toro won't start. Sat for 12 years. Gas drained before storage. oil and gas fresh. air filter clean. spark plug has spark. Engine does run for 1 - 3 seconds after spraying carburetor cleaner in carbur… read more
RUSS
RUSS
SERVICE TECHNICIAN
Vocational, Technical or Trade Scho
1,723 satisfied customers
Hello, I have a toro 3000 gts single stage snow blower, 5hp
Hello, I have a toro 3000 gts single stage snow blower, 5hp Suzuki engine. Runs fine for about 15 minutes, full power, no problems. Then it starts to speed up and slow down in cycles, losing power. It… read more
cameronsmallengines
cameronsmallengines
Small Engine Service Technician
High School or GED
217 satisfied customers
Hi Bobby, Youve helped me before. I have a Briggs and Stratton
Hi Bobby, You've helped me before. I have a Briggs and Stratton 3.75 hp lawn mower. The gas has sat in it too long I suppose. When I prime it by pressing that rubber bulb on the side of the carb the e… read more
Rick
Rick
Factory Authorized Trainer
Vocational, Technical or Trade Scho
4,218 satisfied customers
Honda generator EB5000X - fuel left in tank and perhaps fuel
Honda generator EB5000X - fuel left in tank and perhaps fuel line for 3 or so years. Fuel tank and line cleaned and new fuel put in. Engine will not start. Carburator fouled? Is there a way for a home… read more
DONNY R
DONNY R
Associate Degree
34 satisfied customers
Having purchased a Craftsman 5600W Power Generator in 2005,
Having purchased a Craftsman 5600W Power Generator in 2005, I started it in 2006. After operating the equiptment in 2006 I drained the fuel tank for storage. In 2007 it would not start again unless fu… read more
DONNY R
DONNY R
Associate Degree
34 satisfied customers
I have a Coleman 10HP Powermate generator that is ...
I have a Coleman 10HP Powermate generator that is impossible to start. I drained the gas and put in new gas and it still won''t start. Any ideas? Thanks… read more
DONNY R
DONNY R
Associate Degree
34 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x