B&D CMM1200 won't start/blade doesn't spin. Fully charged & it tries to start - blade moves maybe 1/4 inch, there's a "clunk" & that's it. Blade, blade insulator & spacer replaced with no difference.

SOURCE: cannot pull rope out to start mower

Bad news , Mower has sit up too long and the piston / crankshaft has become rusty and froze in place. (fix) buy some liquid wrench it comes in a can at your local hardware store...Tilt the mower onto its front wheels and remove the spark plug. Fill the Cylindar with the oil and leave it for a couple days. after a few days lean the mower back and attempt to pour out the left over oil. Then (Check Your Oil level) preferable replace old oil and pull choke..and start mower...if the engine is still frozen (Buy a New mower) 125bucks Sears.

SOURCE: change rotory blade on craftsman 917377794

This is a nice mower, it has a Honda engine. The blade bolts onto a "blade brake clutch" which is why you see 3 bolts. Removing the two outer bolts should release the blade. Normally these bolts are about 1/4" to 5/16" diameter at the threads, and have split washers to prevent them from accidentally coming loose from vibration or impact.

Here's the steps I use when replacing the blade:

1. Pull the spark plug wire off the spark plug.
2. Lay the mower over on it's side (gas filler cap should be up, so whichever side allows the gass filler cap to end up on the high side of the engine).
3. Find a wrench that properly fits the blade bolts.
4. If right-handed; wearing a garden or protective work glove on the left hand, grasp the blade.
5. Unbolt both bolts by turning in a counter-clockwise direction (left circular direction).
6. Remove the bolts being sure not to lose the locking washers.
7. Pull the blade off the blade mount (sometimes a light tap is necessary to loosen the blade from the blade mount).
8. Replace the blade with the exact Sears part number (diagram and parts list attached below).
9. Thread the bolts back on using your fingers to get them started - don't force them if they start to bind or you'll cross-thread them; bad thing).
10. Snug the bolts down tight, sufficient to compress the locking washers flat.
11. Don't overtighten, they need to be tight, but if you use a long handle wrench or ratchet drive you can cause them to break or fail while the balde is spinning, another bad thing. Tighten them snug assuring the washers compressed flat.
12. Turn the mower back upright onto its wheels.
13. Replace the spark plug wire back onto the spark plug.
14. Leave sit for 30 minutes before starting to assure the oil has returned level in the engine before you attempt to start the engine.

SOURCE: What is the difference in a regular blade and a mulching blade?

A regular blade has a straight cutting edge, a mulching blade is bent to have a high and low cutting edge. Even if you have a mulching blade on, if the grass is too high or wet or you're cutting too low, it won't do a good job and may require a second pass.Raising your cutting height can help. Hope this helps. Dwain

SOURCE: Cant remove blade on lawn mower

Follow directions. See if this works;

Blade Maintenance
�� Warning! Switch off, remove the isolator
key, battery and grassbox before adjusting
or cleaning.
�� Always wear gardening gloves when handling
or working near the sharp blades.
Turn the machine on its right side and inspect
the blade; if blunt or damaged, replace.
Use the following procedure to remove and replace
the blade:
Insert a screwdriver into hole 26 to lock the
drive. Hold the blade 30 using gardening gloves
(not provided) and use a spanner (not provided)
to remove the blade bolt 29, blade washer 28
and blade 30.
Fit the blade 30, blade washer 28 and the blade
bolt 29. Ensure that the blade is the correct way
up (so that this symbol can be seen located
as in figure I) and tighten the bolt 29 firmly.
Ensure the screwdriver is removed before attempting
to turn the machine on.

If this procedure does not work then try the following;

It is not uncommon for the blade bolt to become seized onto the shaft due to all the gunk and moisture on the underside of the deck. Try to soak the bolt several times over with penetrating oil ( WD 40, PB Blaster, etc). Spray the bolt head, the top of the blade where it contacts the shaft, etc. Do this several times and let the penetrating oil soak in. Hit the bolt head gently several times with a hammer to loosen up the corrosion. Then try to remove the bolt per directions.
Hope this helps, if so Please rate, Thanks, and Good Luck!

SOURCE: cub cadet riding mower blade won't turn on

If the click you hear is the electric PTO engaging, then your deck belt is broken or off a pulley some where. Check the belt & then clarify if needed