Question about Garden

2 Answers

Hard starting and poor running

After replacing the filter & plug, and adding fresh gas, my toro mower w/ a
6 hp Briggs engine just won't run well. At idle and at speed, load or no load, it constantly varies in rpm and starts v. hard. Never a problem until this year, so I'm stumped, especially since I see no idle adjusting screw on the carb.
Thanks in advance for any help or tips.

Frank

Posted by on

  • 2 more comments 
  • creekfishr1 Sep 10, 2008

    Ty for your suggestion Benimur.
    I did try w/o the filter, and ran it at high rpm, but it still idles hi and lo and still runs hi and lo, as if the mixture needed adjusting, but of course, no mix. adjusting screw on this model. Starts hard even with starting fluid.

  • creekfishr1 Sep 10, 2008

    Thanks again, and I'll try that.
    Btw, it is a four stroke, so no oil mix.
    In this engine the choke is always closed, because of a small spring, but holes are put in the choke-plate to allow air in. At idle or at load, it revs up and down, but more so at idle. A strange setup I agree, but all in the name of emissions I suppose. It's always run great in the past, and started easily, but I'm thinking the new ethanol-laced gas and/or dirt may be the problem.

    Hope this helps!

  • Kenny Hunting
    Kenny Hunting Feb 20, 2009

    Hi i have exactly the same problem.
    i have changed both springs that are connected to the carby because they where stretched and old.
    It didn't fix the problem, instead now it only runs flat out.
    I'm only guessing but i think it might have something to do with the white thingy under the pull start cover.

  • corbinator19 Mar 14, 2009

    it starts up and idles up and down what could it be? the springs are fine

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Governor:

    An expert whose answer got voted for 20 times.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 15 Answers

The reason it surges is it's not getting enough gas, the gas is stale or has water in it. Unscrew the jet out of the bottom of the carburetor and clean it and allow the gas in the carb bowl to drain out. Refill with newly purchased gas and be aware that gas for small engines should not be kept more then 30-45 days. I work on these units for a living and 70% of what we see are fuel related issues.

Also, the choke should never be on all the time. If you have a primer on your motor, it's doubtful you would have a choke. Perhaps you are looking at the throttle plate.

Posted on Apr 23, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi,

Try running the engine without the filter and check if the idle would smoothen, maybe a little high. If problem persist, then it would be fuel delivery problem. If the idle is constant (but high), then some sort of blockage on the air filter or a vacuum leak.


Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 10, 2008

  • Louie  Role
    Louie Role Sep 10, 2008

    Hi again,

    Appreciate the reply/postback.

    A query pls, two stroke or 4 stroke?

    Alternately, you can try choking the carb throat, that is momentarily covering (with your palm) the opening where the airfilter base sits on. In effect, you are covering the air intake and forcing the engine vacuum to draw air elsewhere. The idea is to force any foreign object, dust, sand, grime, dirt, gum, sludge through whatever opening it can pass through and enter the combustion chamber.

    Alternately, if it were a two stroke engine, then perhaps too much 2T oil is inside the intake manifold and/or combustion chamber making the burning irregular. In some extreme cases, 2T could very well be also inside the crankcase and in a 2stroke engine, this would cause very lean mix.


×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Why wont briggs and stratton 12.5 h run without choke?


Carb is dirty and before you tear it really apart take the fuel bowl off if it has one and clean it real good and blow the dirt out of the fuel jet which is the bolt that holds the bowl on .That may be most of your problem. Drain the old gas and replace with fresh as well. Won't hurt to run some cleaner through as well.

Jun 22, 2014 | Toro 42 In Deck 19 Hp Kohler Courage Twin...

1 Answer

17 hp briggs stratton ohc


Clean or change air filter. Clean, gap or change spark plug. Empty gas tank add fresh gas with Stabil. When spark plug is removed pull rope several times to blow out cylinder. Spray starter fluid in spark plug hole before replacing spark plug. Clean outside of carb so choke works freely. Spray starter fluid into carb breather hole with air filter removed and try to start. if running replace air filter and cover. If no start disassemble carb and clean. If no start replace carb.

Jun 19, 2013 | Garden

1 Answer

2009 190cc Briggs starts but won't run


Ensure the oil is full. It has an oil low sensor. 30w oil.

Jun 13, 2013 | Toro Garden

1 Answer

Hard start cold


Ensure gas tank only has fresh gas with Stabile. Replace spark plug and air filter. Fill oil. 30w.Ensure primer bulb is not cracked.

May 21, 2013 | Toro Garden

1 Answer

I got a poulan po1742stb riding mower with a 17 hp briggs n stratton engine it was my dads and it hadnt cranked since he died which was bout 2 years ago so i had to replace the ignition coil and my wiring...


Thanks for stopping by...
When you said "cleaned the carb" - did you disassemble, and clean - or just spray carb cleaner into it?

Sitting for 2 years - the additives in the gasoline can leave a varnish that will clog the tiny jet orifice in the carb bowl.

You'll need to disassemble, and clean out the jet with a wire.

Popping and sputtering can be caused by a few things:

Old Gas - drain and refill with fresh.
Dirty Air Filter - Check and clean/replace it.
Poor Fuel mix/ratio - clogged Carb Jet or sticky butterfly.
Poor Spark - check/change the plug.
Fuel Vaccuum - remove the gascap - and start... the vent hole may be clogged. Clean and/or replace it if it starts running better with the gas cap off.
Clogged Fuel Filter/inlet screen - backflush the tank and the debris should wash back into the tank. Rinse out and re-install.

This is most likely a fuel delivery or spark issue.

Change the fuel and plug first... and give the carb a GOOD cleaning... then re-check.

Thanks!

Sep 22, 2011 | Poulan 42-Inch Steel Deck 17.5 HP Briggs &...

2 Answers

I have a 2006 Toro 6.75 hp GTS lawn mower. I am


Your carburetor needs cleaned,you had gas in it that you drained out and replaced with new ? What engine do you have tecumseh,briggs,? Anyway remove carburetor and take apart get acan of carburetor cleaner and spray though jets in carburetor and blow out jets be carefull not to blow out needle seat !

May 15, 2009 | Toro Lawn Mower With Toro Power Tools

1 Answer

Wont run smooth


have the govenor checked could be the spring is worn down

May 10, 2009 | Toro Lawn Mower With Toro Power Tools

1 Answer

I have a murray 22 inch lawn mower with a 4.0 hp briggs and


Change your air filter, spark plug, fuel filter, and oil. Then make sure the gas is fresh. Gas starts going bad after a month. Spray carb cleaner in hole underneith the fuel filter. Oh yea dont put more than 20oz of oil in it.

Mar 27, 2009 | Garden

Not finding what you are looking for?
Garden Logo

Related Topics:

482 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garden Experts

EugenesDIYDen
EugenesDIYDen

Level 3 Expert

479 Answers

Dennis Key
Dennis Key

Level 3 Expert

2467 Answers

john h

Level 3 Expert

8286 Answers

Are you a Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...