Small Engine

Small Engine Troubleshooting Problems? Ask a Mechanic Now.

Ask an Expert,
Get an Answer ASAP!

Small Engine

I have an ultra source 12500 that as soon as I start it, it

Customer Question
Hi I have an ultra...
Hi I have an ultra source 12500 that as soon as I start it, it revs real high and shuts down i've checked the oil level and its good. Any suggestions would be great
Submitted: 2 years ago.Category: Small Engine
Show More
Show Less
Ask Your Own Small Engine Question
Answered in 10 hours by:
9/21/2015
Technician: Hank F., Technician replied 2 years ago
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,369
Experience: Certified on Onan and Generac generators
Verified

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

What are the model and serial numbers of the genset?

Ask Your Own Small Engine Question
Customer reply replied 2 years ago
Hi Hank,
Sorry for the delay. the item# ***** serial# ***** listed below.
Item #:(###) ###-####Serial #:(###) ###-####
Thanks in advance
Chris
Technician: Hank F., Technician replied 2 years ago

How long has this unit been sitting since it was run regularly?

Has there been any work done to it recently?

Ask Your Own Small Engine Question
Customer reply replied 2 years ago
I try to run it a month. No work has been done in the last 9 months. Is there a way to read the oil pressure switch? If so, is it normally open or normally closed?
Technician: Hank F., Technician replied 2 years ago

The oil pressure switch is normally open, but it is not your problem.

The oil switch does not cause an engine to over speed - it just causes it to shut down.

Over speed is usually caused by a lean running condition - too little fuel or too much air.

But on your unit, there are a couple of other things that it can be.

The first thing you need to do is to get a voltage and frequency reading - manipulating the throttle to try and keep it running for a few seconds.

What voltage and frequency reading do you get?

Ask Your Own Small Engine Question
Customer reply replied 2 years ago
should I do the requested tests from on of the outlets on the panel?
Technician: Hank F., Technician replied 2 years ago

Yes, that is the best place to test at.

Ask Your Own Small Engine Question
Technician: Hank F., Technician replied 2 years ago

Did you get the voltage and frequency readings yet?

Ask Your Own Small Engine Question
Customer reply replied 2 years ago
117v 55hz tested with a fluke 83 - III
Technician: Hank F., Technician replied 2 years ago

If it is only running at 55 Hz, it is not over speeding - it is not running fast enough.

Try this for me.

Remove the air filter.

While cranking the engine, start spraying in some carb cleaner (do not use starting fluid).

Can you keep the engine running with carb cleaner?

If so, you have a bad carburetor.

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.

Often, 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.

If for some odd reason this does not help, please let me know so I can assist you further.

.

Ask Your Own Small Engine Question
Technician: Hank F., Technician replied 2 years ago

Was this what you wanted to know?

Ask Your Own Small Engine Question
Ask Hank F. Your Own Question
Hank F.
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,369
15,369 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

14,060 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

2,844 satisfied customers

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

RUSS

RUSS

SERVICE TECHNICIAN

1,723 satisfied customers

28 YEAR SERVICE TECHNICIAN

Wayne

Wayne

Engine Rebuilder

1,431 satisfied customers

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

< Previous | Next >

Related Small Engine Questions
I have a 2012 Club Car xrt 950 utility cart what size are
I have a 2012 Club Car xrt 950 utility cart what size are the threads I'm gay driven clutch to engage a puller on … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,060 satisfied customers
What type of chain can I buy from Bunnings ware house to fit
What type of chain can I buy from Bunnings ware house to fit a 16”” Homelite Petrol chainsaw CSP 3316 … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
My L110 John Deere won't start. The battery is fine.
My L110 John Deere won't turn over. The battery is completely charged and has clean terminals. Lights come on and everything looks good.… read more
J.R.
J.R.
Vocational, Technical or Trade Scho
7,173 satisfied customers
Murray 24" Rear Engine Riding Mower stuck in gear.
actually be someone to talk to vs an automated responce… read more
JohnF2015
JohnF2015
High School Diploma
1,160 satisfied customers
Installed A 23K Generac last year. Just noticed the
Installed A 23K Generac last year. Just noticed the maintenance light is … read more
Hank F.
Hank F.
Technician
15,369 satisfied customers
I have a 2014 11.5 craftsman snow blower and will not prime.
I have a 2014 11.5 craftsman snow blower and will not prime. I hear air, but cannot create any fuel pressure. Rick … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,060 satisfied customers
I have an Onan Power Express k5000 Model 5.0 KQ-3E/1A. I
Hi I have an Onan Power Express k5000 Model 5.0 KQ-3E/1A. I need either a carburetor or carburator rebuild kit but I do not know the make or model number of the carb on the generator. Ivan… read more
Hank F.
Hank F.
Technician
15,369 satisfied customers
My general generator won't start and is showing Error Code
my general generator won't start and is showing Error Code 1505. what's that mean? … read more
Hank F.
Hank F.
Technician
15,369 satisfied customers
We recently bought a used RV with an Onan Emerald I
We recently bought a used RV with an Onan Emerald I generator that was never wired to the motorhome. We are having trouble locating a technician to hook it up. Any suggestions for service in the Toled… read more
Hank F.
Hank F.
Technician
15,369 satisfied customers
I have A Generac Wheelhorse 5500, which has been a great
Hello. I have A Generac Wheelhorse 5500, which has been a great unit. The 240v output seems to have failed. Are there any checks I can perform before taking the unit for service? … read more
Hank F.
Hank F.
Technician
15,369 satisfied customers
My LP gas Generac generator modelserieshas a leak in the oil
My LP gas Generac generator model(###) ###-####series(###) ###-####has a leak in the oil cooling radiator. I cannot find the part number to replace it and I'm in urgent need of this information. Can y… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Why does my air filter continue to be clogged with engine
Why does my air filter continue to be clogged with engine oil … read more
Wayne
Wayne
Engine Rebuilder
Vocational, Technical or Trade Scho
1,431 satisfied customers
My Poulan Pro blower stays at full throttle all the time.
Good Morning; My Poulan Pro blower stays at full throttle all the time. trigger doesn't change throttle up or down … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,060 satisfied customers
I have a Model 20GS BC-6727 19.5KW Propane Generator. Can
Good afternoon .I have a Model 20GS BC-6727 19.5KW Propane Generator. Can anyone tell me the correct oil and air filter numbers and where to purchase. Regards Mike Toronto … read more
JohnF2015
JohnF2015
High School Diploma
1,160 satisfied customers
Sorry im back but i cant download 3 designs i bought
hi sorry im back but i cant download 3 designs i bought yesterday when i try on the net to ask about who ever is at pinterest as usual just puts rubbish i think he should be told also he stopped me fo… read more
Josh
Josh
It Support Specialist
Associate Degree
5,127 satisfied customers
I have a quick question and it sounds like you guys can
I have a quick question and it sounds like you guys can answer . I have a gx630 and I need to wire a kill switch 6 ft away from the motor. The gx630 has a key operated ignition switch. I currently hav… read more
JON
JON
Master Service Tech
MASTER SERVICE TECHNICIAN
1,467 satisfied customers
My gc160 honda starts, runs for a 20 seconds and dies. If I
My gc160 honda starts, runs for a 20 seconds and dies. If I shoot carb cleaner into the carb it keeps running. From the placement of the fuel tank I assume it uses a fuel pump. Is this true? Do they f… read more
Richard
Richard
Senior Mechanic & Technician
69 satisfied customers
I have a generac 4000xl with a broken (dog chewed the wires)
I have a generac 4000xl with a broken (dog chewed the wires) snubber feedback cable towards the end bell. I can't seem to find the control board (since it's an older generator) and wanted to know if t… read more
Hank F.
Hank F.
Technician
15,369 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