Question about Homelite Mighty Lite Lawn Trimmer

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Appears to have no power to plug. Can't see any spark in plug! Can smell gass after several pulls. Ran fine everytime over last 2 yrs. Doesn't even try to start at all.

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Disconnect the wire from the kill switch and retry, if you get spark after disconnecting the wire it means the switch is shorted out and needs to be replaced.

Posted on Jun 04, 2010

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Ran fine. shut off. will not start. tries but backfires


It could be as simple as a sheared flywheel key and/or the valves needing adjustment. The OHV engines that come in lawn and garden equipment these days are notorious for being very picky about the correct valve settings, especially single cylinder engines. Another common problem involves the fuel inlet valve in the carburetor. Not the solenoid valve but the float valve inside - if it doesn't seat properly fuel will overflow the carburetor and enter the engine. Several bad things happen after that - the cylinder can get enough gasoline in it to lock the piston when you try to start it and that can result in the aforementioned sheared flywheel key. The gasoline will also get past the piston and into the crankcase where it dilutes the oil and the result is poor lubrication. one of the first components to suffer from the lack of lubrication is the camshaft, particularly the exhaust valve lobe, which wears down to the point that it does not open the exhaust valve far enough and the exhaust cannot be expelled fully on the exhaust stroke. The leftover gasses then escape from the engine through the carburetor when the intake valve opens, sounding like a backfire but rather than fire coming out the carb you get popping and raw gas blowing out the intake. Check your oil for the odor of fuel. If it smells like gasoline and, perhaps is inexplicably overfilled with oil according to the dipstick, plan on having the carburetor inlet needle and seat replaced, possibly the flywheel key replaced and probably the camshaft replaced. Keep your fingers crossed that it is just the valves needing adjustment.

Aug 14, 2012 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

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Fairly new gas pressure, was working fine when ran out of gas, now rope wn't pull as if engine locked or rope assembly is awry, checked oil and is full, engine doesn't appear to be excessively hot....


If you tip the unit the wrong way you can get oil into the head area which will cause a hydro-lock as the piston can not compress a liquid. Pull the spark plug out and then try to pull on the recoil rope. Make sure you are not near the spark plug hole because if there is oil in there it will spray out.

Jul 16, 2011 | Karcher 2500 PSI Pressure Washer

1 Answer

I have a 2 year old Ryobi RY34440 String trimmer, 30cc. Last year worked fine, this year pull cord is so easy to pull it doesn't even turn engine over. Is is the spark plug?


Either the pull starter is not pulling or you are not getting compression. To check you need to check the spark plug is still snug. If so, remove the plug and put a drinking straw in the hole to touch the piston. Slowly pull the starter to see if the piston is moving. If the piston is moving and the plug was snug then you are losing compression somewhere, like a head gasket. If not moving then the problem most likely is in the starter, and disassembly required to investigate.

If really helpful, please rate.

Jul 12, 2011 | Ryobi Garden

1 Answer

Pro 42CC 2 Cycle Chainsaw, 18": New gas, clean plugs..Ran fine last year, won't st...


Check for a plugged fuel filter and defective fuel lines. Make sure the carburetor fasteners are tight. Check for spark at the plug--it should be blue and snappy with a new plug. If ok, squirt in some fuel mix in the plug hole, replace the plug, and see if it will pop a couple of times. If ok, make sure the primer bulb draws fuel into it after several pumps. If still won't run, remove the lower chamber of the carburetor and check the diaphragm for flexibility and no holes. Hope this helps!

May 12, 2010 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

I have an 89 ford bronco 2 with a 2.9 liter it sat around for 2 years without being started. I replaced the plugs, rotor, cap, ran fuel injector cleaner through it several times, checked cylider...


check the spark plug wires are attached all the way till it snaps, pull each spark plugs, any black deposits on any plug means it isn't firing(faulty plug,or wire) last of all take off each injector wire and notice if there is a change in idle speed (plugged injector)

Mar 21, 2010 | 1989 Ford Bronco II

1 Answer

Craftsman gas leaf blower will not start. Spark and gas lines ok. Not getting gas to plug even after prime and several pulls. How do I find gas supply problem. Diaphram in carb looks ok .It actually...


Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled
b) is there spark

2) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated
3) Check cylinder compression


Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Nov 25, 2009 | Craftsman Garden

2 Answers

19.5 HP brggs engine (craftsman) shuts down after long runs.


Sounds like the coil,pull the shutoff wire off the coil and try it.if you still dont have spark replace coil.

Mar 17, 2009 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

1 Answer

1996 Dodge Caravan Won't Start


pull the distributor cap and see if the rotor turns. there is a possibility that the timing bellt is bad

Feb 28, 2009 | 1996 Dodge Caravan

1 Answer

1998 Cavalier No Spark in cylinders 1 & 4


ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

Jan 13, 2009 | 1998 Chevrolet Cavalier

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