Question about Garden

2 Answers

I have a lawnmower with a BSA 3.5 engine that I cannot start, the problem seems to be no spark at the spark plug. As I have never worked on a lawnmower I have no idea what generates the spark on lawnmowers, so I am reluctant to start taking the lawnmower apart until I know what I am doing. Anyone got any ideas where I should start. Thanks GBW

Posted by on

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sniper:

    An expert who has posted more than 50 answers, of which 90% or more were rated as helpful.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 57 Answers

Test for spark by placing a screwdriver into the spark plug wire and holding it close to a bolt on the engine. should see a spark (blue). If not, problem is likely the armature (coil). The coil is located under the engine shroud and held in place by two bolts. If you replace this part, (normally $30 to $40) you must ensure a proper air gap. Auto parts stores have inexpensive repair manuals to help.

Lee
Cherokee Small Engines

Posted on May 15, 2009

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,865 Answers

Lawnmowers are pretty simple. They usually have just one spark plug. Pull off the sparkplug wire and remove the plug with a sparkplug wrench. Take the mower to any autozone store and u can borrow their tools and expertise.

I recommend putting new gas in the mower, changing the spark plug and changing the air filter.

Posted on Apr 21, 2009

Ad

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:

1 Answer

No fire to plug was running new engine


How to fix a lawnmower no spark - YouTube

? 11:58
www.youtube.com/watch?v=ckyFlX4CUVU
May 1, 2012 - Uploaded by doublewide6 I got new spark plug still cant start my lawnmower any sujetions... Engine is hard to pull start and get to fire when it's cold but after it does start ...

Sep 19, 2015 | Garden

1 Answer

Mowing at mid throttle, suddenly the engine started over revving. Acts like governor isn't working. Every time I try to restart it instantly starts to over rev.


According to Amie Taylor on http://homeguides.sfgate.com/lawnmower-revs-up-down-100220.html "Airflow Issues A lawnmower that hunts and surges may be experiencing something as simple as an airflow issue. If the air that the engine requires to run is blocked, especially sporadically, it can cause the engine to slow down. When the blockage moves or clears, the engine may suddenly rev up in response. To fix this type of problem, check the air filter to ensure that it's not clogged with dirt and debris. Check the vented gas cap as well. Both issues can cause reduced or sporadic air flow, and clearing them will fix the problem.
Spark Plug Problems Another problem that can cause revving and dying of a lawnmower engine is a faulty or poorly adjusted spark plug. Check the spark plug to see if the wire is connected to it firmly and not wobbling about. If it is connected correctly, remove the spark plug to see if it's covered with corrosion. If so, a simple scrubbing with a wire brush can restore it to working order. If necessary, replace the spark plug with a new one. Check the spark plug gap with a spark plug gauge to ensure that it's adjusted to the proper setting recommended in your owner's manual.
Carburetor Adjustment A carburetor that's incorrectly adjusted is a common cause of poor engine idling that results in hunting and surging. Fortunately, most lawnmowers have two screws that allow you to adjust the carburetor yourself. One screw controls the idle speed while the other adjusts the idle mixture. Check the manual if you're unsure of the location of the idle adjustment screws. Start the mower and allow it to run for 5 minutes. Then slowly adjust the screws tighter or looser in turn until the mower runs and idles smoothly.
Fuel Problems A particularly simple fix that can be at the bottom of many lawnmower idling problems is old or contaminated fuel. If the fuel has been left in the mower while it was stored over the winter or while the mower has remained unused, drain it and replace it with fresh fuel. If you have gas-powered blowers and trimmers that use a mixture of 2-cycle oil and gasoline, check to see that you've not placed that mixture in the lawnmower inadvertently."

May 10, 2015 | Garden

1 Answer

Suffolk Punch 35s not starting


carburetor have a setting level for its fuel , check the floating control adjust fuel level , also check spark plug current is there,just by rotating engine and keeping spark plug out of cylinder , just keeping it with engine body.

Apr 12, 2014 | Garden

1 Answer

What is wrong when your not getting a spark on your lawn mower? It won't start with new spark plug, getting fuel


Dear Kurain,
Howdy, "Coach Dave" here and I work for The Home Depot. I deal with quite a few lawn equipment problems so let's see what we can do for you.
The first thing that comes to mind is perhaps your new spark plug may be defective, it's rare, but happens.
The next thing to check would be the spark plug wire. A spark plug wire wears out sooner or later.
The next usual reason for a small engine not starting is dirty fuel. This reason is more common than you would think and checking the fuel line and adding fresh gas can fix this easy.
Without getting in depth of other problems like ignition coils and such, you might have to take it to a lawnmower shop to get fixed. Although this might sound like an expensive proposition, it is far less then buying a new lawnmower, and who needs a lawnmower that does not work?
yours respectfully, Coach Dave

Feb 13, 2011 | Craftsman Garden

1 Answer

Fuel is OK. Wiring seems OK. Spark is OK. Piston is OK. Yet engine won't start. This is an old model and when we got it, it alwyas battled to start. It was serviced by an agent and worked for a very short...


When I have a problem starting a chainsaw, lawnmower etc what I do is;
  • Remove the spark plug
  • Pour about 5ml (one teaspoon) of fuel into the opening where the spark plug was.
  • Dip the spark end of the plug in fuel so the spark gap is wet
  • Replace the spark plug and try to start it again.
The fuel that you poured into the plug opening should ignite and may start the saw. If not try repeating it 2 to 3 times. Don't be tempted to use more than the 5 ml of fuel as you'll flood the saw. Assuming that there's nothing mechanically wrong with the saw this should get it running.

You probably know this but when you're leaving the saw up run it dry so there's no fuel left in the carburettor as this can cause gum to form in the jets which stops the fuel getting through. Most people run the engine dry when leaving it away at the end of the season but if you're having difficulty starting the saw I'd run it dry every time.

Dec 19, 2010 | Garden

1 Answer

I have a honda o h c push lawnmower it starts easy but cuts out in about 30 secs


I have the GVC160 motor....same problems....just found this info (see link),...and it turned out that Honda used a NGK spark plug that was defective,....I couldn't believe that is all it was...after changing the carb (new),...adjusting valves....etc.. I just went down and bought a new spark plug.....and it runs great!!
----
BEFORE go thru all of the advice and look at most other Honda web info.....go and buy a brand new spark plug and start with that! It appears Honda used a NGK spark plug in the past that fails after some time....giving the syptoms of problems with the carb, sticky valve, etc. Do not try to clean and use the old spark plug!! Check this out....it was the answer I was looking for after hours of work, reading, and talking to Honda dealers - http://forum.doityourself.com/outdoor-power-equipment-small-engines/261743-honda-lawnmower-starting-then-cutting-out.html

Sep 05, 2010 | Husqvarna 160 CC Honda OHC Engine 21 in

1 Answer

Lawn mower won't start


to check for firing remove the spark plug insert it in the plug boot and pull the rope while watching to see if the plug sparks be carefull not to touch the plug electrode while pulling the rope or it will shock you. If you don't have a spark, try a different plug. If still no spark the coil could be bad.

Jun 25, 2010 | Briggs & Stratton Briggs Stratton Intek V...

1 Answer

I have a Honda GCV 160 LAWNMOWER IT WILL ONLY RUN WHEN FULLY CHOKED


BEFORE you go thru all of the advice and look at most other Honda web info.....go and buy a brand new spark plug and start with that! It appears Honda used a NGK spark plug in the past that fails after some time....giving the syptoms of problems with the carb, runs for 10-30 seconds, sticky valve, etc. Do not try to clean and use the old spark plug!! Check this out....it was the answer I was looking for after hours of work, reading, and talking to Honda dealers ---- http://forum.doityourself.com/outdoor-power-equipment-small-engines/261743-honda-lawnmower-starting-then-cutting-out.html

Mar 31, 2010 | Husqvarna 160 CC Honda OHC Engine 21 in

1 Answer

** Help Starting **Yard Machine 21inches 139cc


amiseybold;

First check for spark. Remove the spark plug. Leave the spark wire connected. Hold the plug against the metal of the mower engine so you have a ground and can see the gap of the electrode where the spark jumps across. Have someone pull the starter cord and verify that you have a spark. Hold it by the threads of the plug so you don't get a little spark jolt yourself.

go to an auto parts store and get a can of starter spray (it's actually ether), Remove the lawnmower spark plug and spray a little ether in the plug hole. Put the plug back and tighten it and see if it starts.
It will probably start, run for 5 or 10 seconds and then die. Repeat this procedure once or twice again and eventually it will start to draw gas from the lawnmower tank.

A seasonal tip. when you put the mower up for the winter, **** the remaining gas out of the tank, start the engine and let it run until it uses up the gas in the carburetor. This will make iot much easier to start in the spring

Hope this helps Good Luck Loringh PS Please give me a rating

Nov 08, 2008 | Yard Machines 158cc Push Lawn Mower #11a...

Not finding what you are looking for?
Garden Logo

Related Topics:

857 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garden Experts

Dennis Key
Dennis Key

Level 3 Expert

2478 Answers

roeb

Level 3 Expert

594 Answers

john h

Level 3 Expert

12650 Answers

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

Answer questions

Manuals & User Guides

Loading...