Dilano
soo idk what happened., i missed and hit this screw thingy that was in the concrete tryna get the grass around it., and then the mower went off. waited a min. started it back up and it was kinda shaking alot/hard., kept mowing though and ran over a whole and it just went off. now the string is stuck or some., what to do.?
im kinda a beginner at mowing lawns :)
Answer
Had the same thing happen a couple years ago. You have bent the crankshaft of the mowers engine. There is a soft metal key (woodruff key) that keeps the blade assembly from spinning on the crankshaft. In mine, this key sheered and the crankshaft was minimally damaged. I was able to use a long piece of pipe to bend the shaft back into allignment within less than 1mm. It vibrates, but has run for 2 years now (just used for trimming where my tractor can not go). Mine is a fairly high quality Honda engine.
If you can not pull the rope, then do this:
Drain fuel. unplug and remove spark-plug.
Turn mower over.
Using heavy work gloves, try to spin the blade. If you can not move the blade, or if it is very difficult to move it probably will need replacement or repair.
With an inexpensive engine, it will likely be cheaper to replace the engine (or entire mower) than it will be to fix the broken one. If you have a higher end mower and the deck itself is good, then look into just replacing the engine and blade(s).
Here is a company I have had good luck with:
http://www.northerntool.com/shop/tools/category_engines
Had the same thing happen a couple years ago. You have bent the crankshaft of the mowers engine. There is a soft metal key (woodruff key) that keeps the blade assembly from spinning on the crankshaft. In mine, this key sheered and the crankshaft was minimally damaged. I was able to use a long piece of pipe to bend the shaft back into allignment within less than 1mm. It vibrates, but has run for 2 years now (just used for trimming where my tractor can not go). Mine is a fairly high quality Honda engine.
If you can not pull the rope, then do this:
Drain fuel. unplug and remove spark-plug.
Turn mower over.
Using heavy work gloves, try to spin the blade. If you can not move the blade, or if it is very difficult to move it probably will need replacement or repair.
With an inexpensive engine, it will likely be cheaper to replace the engine (or entire mower) than it will be to fix the broken one. If you have a higher end mower and the deck itself is good, then look into just replacing the engine and blade(s).
Here is a company I have had good luck with:
http://www.northerntool.com/shop/tools/category_engines
Lawn Mower Muffler Popping, and Shaking?
balls
Okay so I got a mower off craigslist, restored it and now it is having some problems.
When primed it starts up usually first pull, so as you can see it runs pretty well. But it seems that it shakes quite a bit and that every 5 or 6 seconds a pop or 2 will come from the exhaust. What is a common cause of this?
What is the easiest option to check first? I don't want to take a part the engine to check the rod or anything if it is not necessary. I have the oil set at full so it is not low on oil. It burns a little bit of oil as well.
Its a 5HP Briggs and Stratton Four Stroke Push Lawn Mower.
Answer
Most lawn mowers have a very simple ignition system. The flywheel has a magnent which passes coil and produces the spark plug voltage. The timing of the spark (which is your problem) is controlled by the flywheel connection to the crankshaft. It has a "key" which fits into slots in the flywheel and the crankshaft. Often, when the blade of the mower hits a solid object, like a curb, the key will start to shear. If it shears completely the engine won't run. If the key just gets bent a bit it throws off the relationship of the flywheel magnet and the pickup coil enough to cause your problem.
Take off the flywheel (under the rope pulley) and remove it from the crankshaft. It's a tapered shaft. Pull out the little key and get a replacement from Ace hardware.
Most lawn mowers have a very simple ignition system. The flywheel has a magnent which passes coil and produces the spark plug voltage. The timing of the spark (which is your problem) is controlled by the flywheel connection to the crankshaft. It has a "key" which fits into slots in the flywheel and the crankshaft. Often, when the blade of the mower hits a solid object, like a curb, the key will start to shear. If it shears completely the engine won't run. If the key just gets bent a bit it throws off the relationship of the flywheel magnet and the pickup coil enough to cause your problem.
Take off the flywheel (under the rope pulley) and remove it from the crankshaft. It's a tapered shaft. Pull out the little key and get a replacement from Ace hardware.
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