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Re: pull to start, smoke comes out and motor binds
Sounds as if the mower has run over a large rock prior to what you are describing, you have a definate sheered pin on the crankshaft, causing the smoke(completely out of time).
You need to take the top off the engine 2 or 4 philip screws on the top plastic shroud, the pull chord assembly removing the pull chord as one unit, 3 philip screws need to be unscrewed or 3 rivets need to be drilled out to unfasten this assembly, after this is complete you will remove the 3/4" nut that holds the "flywheel" securely to the main shaft(crankshaft) with a small hammer and the 3/4 nut lightly threaded on the shaft take a block of wood and lightly tap it this action releases the flywheel from the shaft...do you now see the woodruff pin sheared off in the machined groove on the shaft? replace that pin(shear pin,woodruff pin many names for the same part) take the old one to Ace Hardware or the like and get a new one, while it is apart and the plug of course is removed for safety sake of no start while working on it... turn the blade observe from the under carriage to see if the shaft is bent if it is I dont recommend repairing it replace the mower its an expensive job, if the shaft is ok sometimes the blade gets bent...replace the blade, Ace should have this as well bring old blade along when you go for the pin.
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You've either broke the motors housing moving the motor out of alignment or the impact on the blade has snapped the drive belt by the sudden torque or it's been jerked off by the sudden stop of the blade it's been yanked off the drive pulleys and the nose is the motor running free with no blade resistance you will need to open up and inspect the drive belt assembley system the blade drive shaft pulley access area and the motor access area to either replace the broken belt or refit the belt if it's not been chewed or damaged by the free spinning motor pulley the smoke it was proberbly the belt rubbing against the motors drive pulley or wrapping up around it burning it through friction Or your broke the motors drive shaft HOUSING allowing the driving motor and pulley to become misaligned dropping drive belt off The motor funny noise if a banging around sound then is was the still running motor pulley is bouncing around and rubbing against the deck ect. Causing the smoke if this has happened the impact with the stone has caused a kickback effect on the motor twisting it out of its housing breaking it's secure mounts meaning the decks motor is loose the housing has gone, the MOWER extremely dangerous as the motor can at the speed it's running at 3000rpm it will chew thought the rest of the deck in a matter of seconds throwing and ripping itself from the machine sending chunks of broken deck and the motor flying in all DIRECTION possibly causing injuries to any one within range and as the wires rip apart and a possible nasty and even fatal electric shock please for your own safety do not use the lawnmower Until it's been inspected by qualified personnel It is highly unsafe and should either be repaired or replaced which ever the cheaper Advice to check the area your cutting esp when using a high impact resistant plastic deck lawnmower for hidden foreign objects large and small stones as the small ones can be thrown by the blade like a "bullet"! small toys esp metal cars etcetra will make excellent shrapnel and cut the fabric grass box to ribbion it's also you if directly in the debris path Also not good for your lawnmowers blade or deck Pavement slabs are defiantly known as the silent MOWER DESTROYER YOU can't hear it, as you aproch you can't see it before it's too late, there's a Loud bang the MOWER stops that exact same instant and the MOWER IS NOW KNOWN AS BROKEN "! Esp on petrol mowers slabs tend to stop the MOWER dead bending the crank shaft the mowers with a slightly bentccrank will jump Round like it's on steroids or vibrate so badly it will shake itself apart as well as leaving a, very odd sensation in your arms Deposits from animals are just nasty to clean off the deck and wheels so I clear them up too if THERE are any just in case
Sounds like something is binding. or belt is slipping. Does it smoke when not in gear. Check and see if everything turns by hand when out of gear and no motor running. Make sure its not binding anyplace. If that is ok Start it up and just idle the engine and try to run the deck and put it in gear. If that stalls it out then you do have a problem.
Take the plug wire off the engine, so it CANNOT start, then tip up the mower, and try to slowly rotate the blade. Maybe the mower deck is clogged with grass clippings, and is causing the blade to bind. If so, then clean the deck. Or, the blade could be bent, causing it to bind. If so, then remove the blade and replace with a new one. If niether of these conditions exist, and you cannot rotate the motor by hand, then the motor is locked up, and is destroyed, and it is time to buy a new mower.
The cost of repairing this condition, in this machine, is just not worth it.
Does it make a squealing noise then too? The white smoke is probably a belt burning up. Either you have a locked up blade spindle, or the belt is off, and rubbing. Check the deck belt(s) and the clutch assembly.
You may have to inspect the woodruff key that is possibly worn out in the groove of the main shaft, To inspect this key way devise you need to remove the top off the mower probably 4 phillips screws off the plastic housing comes dont forget to pull out the oil stick, then removethe pull chord assembly in one piece 3 rivets need to be drilled out and reinstalled with new ones from Ace hardware when done, then remove the 3/4" nut...tap the shaft not to hard to loosen the flywheel and check to see that the keyway(woodruff pin) is worn out, go to a hardware store with the old one and buy a replacement reinstall everything and mower should be good to go.
Sounds like linkage binding...check underneath for damage to the linkage of either pedal by debris (branch, rock, etc.) or debris jammed between...can of course try holding one pedal down while pulling the other up (engine off) to see if this will free the obstruction.
Pull plug and check compression. When cranking see if bottom pulley turns from engine. If compression is below 90 psi it won't start and you have an internal problem. Stopped mower immediately sounds like motor blew. Also check side of motor for cracked block, Good luck.
The best advice here is to put your battery on charge, and, while it is charging, remove each connection, and clean the terminals back to "bright and shiney". The clicking noise is probably the solenoid trying to pull in to provide power to the starter. There also sounds like the comnnection to the starter needs to be removed and cleaned. If this connection is dirty or loose, it can arc and smoke without cranking. Also, if the terminals at your solenoid are corroded, the motor cannot recharge the battery on the run, and loss of power to the battery will result. Clean your connections, and try again!
This should correct your issues. In extreme conditions, it may be necessary to replace your wire from the solenoid to the starter, if it is significantly deteriorated, but I'd clean it all up first.
Best regards, --W/D--