Small Engine

Small Engine Troubleshooting Problems? Ask a Mechanic Now.

Ask an Expert,
Get an Answer ASAP!

Won't run. error msg "not sensing RPM" 6-7 years. this error…

Customer Question
Won't run. error msg...

Won't run. error msg "not sensing RPM"

Mechanic's Assistant: How old is the appliance? Have you gotten error messages before?

6-7 years. this error present for two months

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

Yes

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

Just need to know how to get rid of the error msg

Submitted: 8 months ago.Category: Small Engine
Show More
Show Less
Ask Your Own Small Engine Question
Answered in 10 minutes by:
9/10/2017
Technician: Hank F., Technician replied 8 months ago
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,719
Experience: Certified on Onan and Generac generators
Verified

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

What type of equipment is this/

Brand?

Model number?

Serial number?

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
generac.
5870(###) ###-####
Customer reply replied 8 months ago
also, this is a stand by generator
Technician: Hank F., Technician replied 8 months ago

That's ok. I am certified an all Generac air-cooled units up to 60kW. It doesn't matter if is a portable or a stand by.

First. lets see if we can do a simple reset.

Turn the switch to OFF.

Pull the fuse out of the control panel, and wait 10 seconds.

Put the fuse back in.

Set the switch to MANUAL.

Will the unit run now?

Also, by doing this, you will need to reset the exercise timer, as removing the fuse will erase the memory.

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
the engine started, ran for about 5 sec, turned self off. error msg re: not sensing RPMs THANKS
Customer reply replied 8 months ago
It still does not work. What do you suggest?
Technician: Hank F., Technician replied 8 months ago

Ok.

You need to connect an AC voltmeter to the back of the circuit breakers, and start the genset.

How much voltage is it producing for the few seconds it will run?

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
I do have a voltmeter. Lets skiip this on and go forward.
Customer reply replied 8 months ago
the generator will not restart.
Technician: Hank F., Technician replied 8 months ago

I need to know the voltage output - that will tell us where we need to go next.

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
Can we do the volt test tomorrow?
Technician: Hank F., Technician replied 8 months ago

You can do it when ever you are able. There is no time limit on this.

But be advised that I work 2 day jobs, and normally help on Just Answer in the evenings. Tomorrow I have my long job, and work 6:30 AM to 7 PM, and won't be able to respond until tomorrow evening.

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
Hank, I will try to get the information for you tomorrow, the 12th. Will have to borrow a voltage meter. Thanks, Mary
Technician: Hank F., Technician replied 8 months ago

Not a problem at all.

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
The voltage was -0- when tested on the house side of the circuit breaker while cranking.
Technician: Hank F., Technician replied 8 months ago

You need to test on the input (generator side) of the breaker.

This rules out a bad breaker, and everything past it.

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
How do I test on the generator side. We found only one place, and that was near the power On/Off.
Customer reply replied 8 months ago
where is the generator side. Thanks
Technician: Hank F., Technician replied 8 months ago

There are 2 wires on each breaker. One is the input from the stator, the other is the output to the transfer switch.

You need to be testing the stator input side.

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
The generator started on manual, ran for about 30 sec and stopped with low voltage alarm. Tested the stator and showed No voltage.
What color is the wire off the stator? Two black ?
Technician: Hank F., Technician replied 8 months ago

There are 8 wires that come off the stator.

The 2 large black ones that go to the circuit breakers are numbered 11 and 44. The 2 large white ones that go to the neutral bus are numbered 22 and 33.

The other 4 are small control wires that go to the engine to control connector.

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
It appears that we tested the stator and there was no voltage.
Technician: Hank F., Technician replied 8 months ago

Ok.

I have uploaded as series of tests for you to do.

Please do all of the steps in Test 4 - Fixed Excitation/Rotor Amp Draw, and let me know all the results.

Click here to download the tests.

Ask Your Own Small Engine Question
Technician: Hank F., Technician replied 8 months ago

Have you done the tests yet?

Ask Your Own Small Engine Question
Customer reply replied 8 months ago
I am sure that this problem, "not detecting RPM" has happened before and there is an solution that does not require forever testing. Thanks.
Technician: Hank F., Technician replied 8 months ago

There are several things that can set the code. Testing is the only way to find out what is causing it.

There is no such thing as a magic cure.

Ask Your Own Small Engine Question
Was this answer helpful?
Ask Hank F. Your Own Question
Hank F.
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,719
15,719 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

14,707 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

2,869 satisfied customers

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

Wayne

Wayne

Engine Rebuilder

1,877 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
Kohler datag is missing. Need to know model and spec number
Kohler datag is missing. Need to know model and spec number to be able to order engine parts. it is on a snapper model #331413kve serial#45624076.casting number on head is 12 494 03 933.. casting numb… read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 satisfied customers
I have a JD L100 lawn mower which starts and runs fine with
I have a JD L100 lawn mower which starts and runs fine with no load, but when blades are engaged, it does not recover to full rpms, so no power. Does not stall,but cut is poor and speed is slow. No bl… read more
JON
JON
Master Service Tech
MASTER SERVICE TECHNICIAN
1,785 satisfied customers
I have a craftsman lawn mower modelused maybe five times. It
I have a craftsman lawn mower model###-##-####used maybe five times. It is spitting oil, a pretty large amount with black smoke. I am afraid of fire, should I be? Or, can you suggest what the problem … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 satisfied customers
I ran over something in the yard with my lawn mower. The
I ran over something in the yard with my lawn mower. The mower shut down and now I cannot get it started. It acts like the battery is disconnected. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 satisfied customers
Generator is running for a few minutes or seconds and quits.
Generator is running for a few minutes or seconds and quits. Have changed oil and filter and put diesel clean in it … read more
Hank F.
Hank F.
Technician
15,719 satisfied customers
How to repllace steer gear not pinton on 1050 riding moower.
how to repllace steer gear not pinton on 1050 riding moower … read more
Vince O.
Vince O.
Small Engine Technician
High School or GED
2,869 satisfied customers
Mowerrunsfor20sec thendies. Severalweeks ireplaced flote
severalweeks ireplaced flote seat made correct adj flote is level checked to see ifdropped correctly no prob there mower runs good for 15 sec then quits as if is out of fuel sits f or 2 min fires right up runs 15 sec then quits … read more
JohnF2015
JohnF2015
High School Diploma
1,199 satisfied customers
6 hp Briggs and Stratton vanguard runs for a little bit then
6 hp Briggs and Stratton vanguard runs for a little bit then shuts off new carburetor fuel lines… read more
Donald
Donald
Owner / Technician
High School
2,420 satisfied customers
Well, Curtis, I hope your afternoon is going well. When I
Well, Curtis, I hope your afternoon is going well. When I got home from work today I found my Briggs locked up tight with the cylinder and crankcase full of gas. All I did was mount the new carb and s… read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 satisfied customers
Tb35ec stopped after 15 min. will not fire. Just today.
Second opinion] tb35ec stopped after 15 min. will not fire.… read more
JON
JON
Master Service Tech
MASTER SERVICE TECHNICIAN
1,785 satisfied customers
I need a drive belt diagram for craftsman model 917273062.
I need a drive belt diagram for craftsman model###-##-####… read more
JON
JON
Master Service Tech
MASTER SERVICE TECHNICIAN
1,785 satisfied customers
Yard machine surges is it the air cleaner. This started at
this started at the end of last summer and continues now with the mowing season … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 satisfied customers
I have a 26 horse briggs and stratin engine on a z. Sorry
i have a 26 horse briggs and stratin engine on a z … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 satisfied customers
I have aTroy- Bilt 21" Mulching Mower w/ 6.5 hp &s engine.
Second opinion] I have aTroy- Bilt 21" Mulching Mower w/ 6.5 hp B&s engine. … read more
JON
JON
Master Service Tech
MASTER SERVICE TECHNICIAN
1,785 satisfied customers
I have a cub cadet tank M54HN Commercial the tank lawn mower
I have a cub cadet tank M54HN Commercial the tank lawn mower and I am trying to replace the PTO belt. Could you provide diagram and instructions on how to install? thank you… read more
Wayne
Wayne
Engine Rebuilder
Vocational, Technical or Trade Scho
1,877 satisfied customers
I have a cub cadet Tank M54-HN Serial No 3A054Z80019 and
I have a cub cadet Tank M54-HN Serial No 3A054Z80019 and trying to install new PTO belt around the 3 pulleys … read more
Donald
Donald
Owner / Technician
High School
2,420 satisfied customers
Need wiring diagram for Sabre 1842. Just got mower as gift.
no,one wire was hanging loose and starter won't engage with new battery and starter… read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 satisfied customers
I have a 2015 Dixie Chopper Zee2 2342BR ZTR mower. It was
I have a 2015 Dixie Chopper Zee2 2342BR ZTR mower. It was working fine last use. Now the right hand transaxle is locked so bogs down and will not move forward or reverse when the speed control levers … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,707 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