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Loosen the nuts holding the blade - remove them if necessary. 2) Loosen the blade tightener - generally adjacent to the blade - needs a flat screwdriver. 3) Hook the new chain on the sprocket driver and slip the blade back towards the sprocket and install the chain in the blade groove. 4 )Tighten or replace the nuts loosely. Make sure the blade tightener is in the hole on the blade. 5) Replace the chain tension with the screwdriver. 6) Tighten the blade nuts and recheck chain tension. It should move by hand.
There is no such thing as a maximum tension. That depends on the ability of the saw to apply tension-an 18 inch industrial saw can apply more tension to a blade than a 6 inch hobby saw-and the ability of the blade to withstand tension before snapping. The blade's ability to accept tension depends on its size (width and thickness, not length) and the material used to make the blade. A 2 inch blade withstands more tension than a one inch blade of equal thickness. Some steels and carbide are usually brittle (accept static tension) while others are more flexible and better at handling tension while moving.
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Only by replacing the wiper arm can you change the tension. Rarely is this necessary unless the spring is broken. You can easily tell if the spring is boken. No tension on the blades and the spring is broken. Try replacing the entire blade assembly with a new set of quality blades. Trico are inexpensive and very good.
To hold the blade and tension it..
The best thing to do on an ineffective lawnmower blade is to replace it.
When the bail for the the blade clutch is pulled back, against the force of the return spring, the blade is engaged with the engine crankshaft allowing it to spin. When the bail is released, the spring snaps back and the clutch disengages the blade from the crankshaft and stops the blade.
Replace it with a sharp scalpel blade
I had to replace the whole blade assembly. The rubber blade did not come off. The replacement blade from autozone came with the whole assembly. Cost wasn't much more than just the rubber blade style.
you get a hack saw and cut it off or get an alluminion blade to saw it off
Yes the blade is easy to replace.
The handle unscrews which releases the tension on the blade. There is a pin through each end of the blade that slips into a notch in each end of the handle.