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Craftsmen 4.5hp lawnmower starts and stops. starts then stops. i changed the spark plug and cleaned the air filter. still the same??????

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  • Kiltnar Mar 31, 2011

    Which Briggs engine is on the unit? Is it the one with the foam air filter or the paper air filter? Thank you, this will help to make sure you get the correct information about your unit.

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  • 298 Answers

I would suspect the carburettor needs cleaning out - most likely dirt in slow running jets

Posted on Apr 01, 2011

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How do i fix my lawnmower


  • If you are using good quality gas, you may need to change the gas filter or air filter and make sure the gas line is not kinked.
Occasionally, the air filter can be partially cleaned by gently tapping it or some types of air filters can be rinsed and reused.

  • If the gas is contaminated, you will need to remove and/or empty the gas tank and use high octane gas for 2-3 fills.
  • If none of these options resolve the issue, you may need to check and/or to change the spark plug and its connection.
  • If all else fails, consider the cost of a major service vs replacement.

Mar 08, 2015 | Craftsman Garden

1 Answer

How to fix a 3.5 lawn mower?


HELLO,
You can fix these yourself, all you have to do is to follow the instructions below,
1 Remove the spark plug lead from the spark plug and move away from cylinder head. Always do this before attempting any repairs to a lawnmower.
2 If your lawnmower is a "four stroke" mower (separate gasoline and oil), tip the mower so that the spark plug is pointing skyward. Never tip it on its side with the spark plug to the ground.
3 If your lawnmower is "2 stroke" (oil and gasoline mixed) turn off fuel tap. You can tip a two stroke mower any way that is suitable to you.
4 To change a blade, or blade disc, it is often easier to remove the spark plug and feed a length of string into the cylinder head to 'lock' the piston while trying to un-do the blade bolt(s).
5 Check the motor's "air filter" while doing this sort of maintenance as a dirty or clogged air filter will affect engine performance and increase fuel consumption of your mower. Symptoms of a clogged air filter include inability to start, starting and quickly stopping after several sputters, or a weak idle. You may also see oily or smoky exhaust.
6 If your mower is a "four stroke" model, change the oil at least once a year. When it is tipped over with the spark plug in the air, is a good time to remove the "oil fill" plug and drain oil into an old ice-cream container for recycling.


I hope this will help to solve the problem.....

May 31, 2011 | Craftsman Garden

1 Answer

Snapper lawnmower will not start - sparkplug is good, air filter clean, no idea what is wrong


Try a touch of starting fluid right into the carburator by taking the air filter off. If it then starts but wont run or stay running, the reservoir below the carb should be removed to clean at and the pinhole in the vertical intake tube above the bowl nut. This is the most common problem with lawnmower start problems, the pinhole can be unplugged with one wire from a wire brush. Be careful with the gas, at least pinch off the gas hose with a vise grips while removing the carb bowl.. Never use a droplight around gasoline. most lawnmowers have no mixture adjustments, so it is a matter of cleaning the carb, tank, gas lines. Some oils in gas mix systems settle and clog after less than one season. Spark can be tested by sight, remove the plug and use a clip-on ground wire from spark plug body to metal on the engine with the plug wire connected.

Jul 05, 2010 | Omega Rear Drive Wheel Snapper Mowers

2 Answers

Murray 21 inch 3.75 lawnmower. Not starting.


buy a ethanol based spray called start ya bastard. spray in the carburator and then pull the cord. 9 out of ten it will start

Mar 14, 2010 | Garden

1 Answer

Craftman lt3000 lawnmower just stop running and can't get it to start. have tested battery and spark plugs both r good.


The ignition module on the engine may have gone bad. it may need to be replaced. Plus check air filter to make sure it is clean.

Sep 26, 2009 | Craftsman Garden

2 Answers

Lawnmower wont start


Possible Causes Corrective actions
Unit will not start Control handle is not engaged Engage control handle spacer.gif spacer.gif
Spark plug wire is disconnected Connect spark plug wire spacer.gif spacer.gif
Fuel tank empty or stale fuel Replace with clean, fresh gas spacer.gif spacer.gif
Blocked fuel line Clean fuel line spacer.gif spacer.gif
Faulty spark plug Replace, clean, or adjust gap spacer.gif spacer.gif
Engine flooded Wait to restart, do not prime spacer.gif spacer.gif
Air filter filled with dirt or debris Replace or clean air filter

May 23, 2009 | Mtd 22" Yard Machine Push Mower

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...


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

Apr 21, 2009 | Garden

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