Small Engine

Small Engine Troubleshooting Problems? Ask a Mechanic Now.

Ask an Expert,
Get an Answer ASAP!

Small Engine
This answer was rated:

Tecumseh Snow Blower is surging. What can cause it?

just rebuilt carb on 8...
just rebuilt carb on 8 hp tecumseh snow blower. Surges
Show More
Show Less
Ask Your Own Small Engine Question
Answered in 2 minutes by:
11/2/2008
PK.
PK., Small Engine Technician
Category: Small Engine
Satisfied Customers: 1,052
Experience: Retired Owner of a full service shop and national parts sales website.
Verified
Hi, can you give me some details about what you did with the carburetor? Did you replace the needle and seat, adjust the float, etc.? Also, what's the model and spec number of the engine?
Ask Your Own Small Engine Question
Customer reply replied 9 years ago
replaced the needle,bowl gasket,new main jet and idle adjust. Did not replace seat. did not adjust float. Set initially at 1 1/2 turns out on both main and idle adjust. Set idle stop at 1 1/2 past contact with throttle plate. Continues to surge. It is on a 26" snowbird snow blower.
Customer reply replied 9 years ago
ser 9227D

Did it have a Viton tipped needle, like a rubber tip, or was it solid metal? And what material is the seat?

 

The float must sit level with the base of the carburetor when you turn the assemble upside down. Did you check for this?

 

Surging can have several causes, poor intake seals, loose head bolts, leaking head, malfunctioning governor, poor governor spring tension, poor carburetor air flow, and others.

 

The thing to do is start with the cheapest, simplest and most obvious. That would be the float level if you couldn't adjust the mixture screws and eliminate the surging.

Ask Your Own Small Engine Question
Customer reply replied 9 years ago
I did not check the float level. It also runs better when the choke is partially closed. It is an all metal needle. Is there a diagram on how to check and adjust the float level?

If it has an all metal needle then it should have a neoprene seat which has to be changed. I use an awl which I put a slight hook into the tip of for pulling the seats but any slender stiff wire will work. You pretty much have to replace the seat when replacing the needle if it does have the neoprene seat.

 

For checking the float, all you have to do is turn the carburetor upside down and see that the float is parallel to the base of the carburetor. There should be an even gap all the way around it. If you have a metal float, you can bend the little tab where it contacts the needle to adjust it. If you have a plastic float and it's off kilter even after replacing the seat let me know and we'll go from there.

 

One other thing I would ask is when you rebuilt the carb, how did you clean it?

Ask Your Own Small Engine Question
Customer reply replied 9 years ago
I did not see a neoprene seat. I will check the float. I cleaned it with some mineral spirits and sprayed some ether through it as well.

Customer reply replied 9 years ago
It is a metal float.

Mineral spirits work well for cleaning carburetors. Especially if you soak it for an hour or so. Then rinse with water and blow out with air.

 

The engine will have a model number, like HSK40 or something similar and a number after that. Can you give me those numbers?

Ask Your Own Small Engine Question
Customer reply replied 9 years ago
I am going to take it off the machine again and check the float and take a closer look at the seat.I adjusted the float . I am getting gas in the bowl but now when I prime it I get no priming gas and it looks like I am not getting any gas up through the high speed jet.

Ser number hm80155127F 9227D

Customer reply replied 9 years ago
You will not believe what I found. During shipping of the rebuild kit. The neoprene gasket for the needle valve got stuck in the main jet. It fit perfectly but was restricting flow. When you told me about the neoprene gasket for the needle valve I recognized what had happened and removed the misplaced gasket. It runs OK at high speed<a little rough with an occasional slight backfire, but I can not get the idle adjust right.
Customer reply replied 9 years ago
Thanks for your help. We bought some land near Telluride ( I assume your shop is in Grand Junction,Co.) and hope to retire there. Living in Cleveland now. Trying to get things ready for the winter. Expect payment after your next response.

I'm in Tennessee, but everybody assumes Colorado.

 

To adjust the carb so it runs smoothly, turn the main mixture screw out 1 and 1/2 turns, crank the engine, set the throttle to your normal run speed and then slowly turn it in until the engine starts to run rough. Then back it out until it runs smoothly and then rough again. Then set it at the halfway mark of where it ran began to run rough. The trick is to turn the screw extremely slowly. It should take a couple of minutes to go from rough to rough.

 

Then set the throttle to allow the engine to slow idle and do the same thing with the idle jet, the one on the side.

 

If it's backfiring through the carb then it's running a little lean and that needs to be corrected as you can damage the engine from overheating.

 

I suspect winter is pretty close to Cleveland about now. Thanks and let me know if you need anything else, PK.

PK.
PK., Small Engine Technician
Category: Small Engine
Satisfied Customers: 1,052
Experience: Retired Owner of a full service shop and national parts sales website.
Verified
PK. and 87 other Small Engine Specialists are ready to help you
Ask your own question now
Ask PK. Your Own Question
PK.
PK.
PK., Small Engine Technician
Category: Small Engine
Satisfied Customers: 1,052
1,052 Satisfied Customers
Experience: Retired Owner of a full service shop and national parts sales website.

PK. 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

14,377 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

2,858 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

1,607 satisfied customers

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

< Previous | Next >

Related Small Engine Questions
How much does it cost to use this. Its my pto on my cub
ok its my pto on my cub cadet, when I try to crank it the clutch turns and motor locks … read more
Donald
Donald
Owner / Technician
High School
2,232 satisfied customers
I have a simplicity garden tractor with a 16HP Kohler
I have a simplicity garden tractor with a 16HP Kohler engine. The crankcase filled with gas so I bought a new carburetor and changed the oil and filter. Now when i attempt to start the engine white sm… read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,377 satisfied customers
I am in Australia and my Toro twister 1600 engine is toast,
Hi I am in Australia and my Toro twister 1600 engine is toast, I have been in touch with the local toro dealer. But they are as useless as. How do I get a new engine, it has a tapered shaft? … read more
JON
JON
Master Service Tech
MASTER SERVICE TECHNICIAN
1,509 satisfied customers
My onan marquis 7000 gas generator will run but it is not
my onan marquis 7000 gas generator will run but it is not putting out any 110 power to the breakers on the generator itself. … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,363 satisfied customers
I'm owning a 15kw generac genset. The display is like crazy,
i'm owning a 15kw generac genset. The display is like crazy, it keeps countdown the day: 1,2,3,4,5,6.... … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,363 satisfied customers
I have a newer troybuilt snowblower that appears to have gas
I have a newer troybuilt snowblower that appears to have gas in the oil, what would cause this and is there any hope? … read more
JON
JON
Master Service Tech
MASTER SERVICE TECHNICIAN
1,509 satisfied customers
I have 3.6kyfa26120l and was determined the regulator needs
I have 3.6kyfa26120l and was determined the regulator needs replaced part with (###) ###-####which is obsolete at Cummings/Onan none to be found. Couldn't i find an adjustable regulator plumb it aroun… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,363 satisfied customers
Duro Max XP4400E 3500W. Electric start. Starter motor does
Duro Max XP4400E 3500W. Electric start. Starter motor does not engage, just a whirring sound. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,377 satisfied customers
I have been working on my Kohler marine generator 5E do you
Hello I have been working on my Kohler marine generator 5E do you have help me a few weeks ago on it I have had this unit in and with some minor usage it has fouled out the right-hand plug again you h… read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,377 satisfied customers
Where can I get a manual for my Tecumseh motor
Hi Pearl, where can I get a manual for my Tecumseh motor HMFK105-159901 … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,377 satisfied customers
I have a blower that I gave to a friend to use. With out my
With out my knowledge he took it with to the tennis courts. It had not been used by me. He added gasoline to the tank but he did not know that he needed to use 2 cycle oil … read more
Wayne
Wayne
Engine Rebuilder
Vocational, Technical or Trade Scho
1,607 satisfied customers
I have kohler 18 hp k361qs the will not start with out
I have kohler 18 hp k361qs the will not start with out keeping the choke pulled, getting fuel new carb,new head gasket … read more
Curtis B.
Curtis B.
Technician
Associate Degree
14,377 satisfied customers
Can you help me with my generac standby generator. Model
I think it's fairly new top of air cleaner breather say teste 5/16 and yes … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,363 satisfied customers
Can you repair the generac starter Generac starter 20692. 30
can you repair the generac starter Generac starter 20692 … read more
Wayne
Wayne
Engine Rebuilder
Vocational, Technical or Trade Scho
1,607 satisfied customers
I have a Brigs & Stratton engine Model # 030432 Built in 09.
I have a Brigs & Stratton engine Model # 030432 Built in 09. It will start and run for about a min.Then it chokes out and dumps fuel out of the Carb. and I discovered that the crank case was full of g… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,363 satisfied customers
The machine won't start - almost new - 10-12hours max
The machine won't start - almost new - 10-12hours max running. It's a storm 2410 … read more
Donald
Donald
Owner / Technician
High School
2,232 satisfied customers
Have a model 4bgefa26101j onan rv generator. The starter
Have a model 4bgefa26101j onan rv generator. The starter button stuck and burned up the starter and solenoid so I replaced them along with the main board. Now it runs when I press the starter button b… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,363 satisfied customers
I replace Excelerator governor after rat chewed wire up now
I replace Excelerator governor after rat chewed wire up now won't start … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,363 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