I recently sharpened my blades and i noticed swirl or circular scalping pattern in my bermuda turf. what might be the cause. my mower is a honda hrr216

Make sure all of the mounting connections are good and bolts are tight. Make sure the spindles are not at an angle causing the blades to be uneven.

bent blade, bent crankshaft, blade not balanced are all possible causes for vibration.
If you sharpened the blade recently try rebalancing it.
You could have struck something while mowing and bent the blade or bent the crankshaft on the engine.
If blade is bent replace it. If out of balance, rebalance it.
If crankshaft is bent replace it, have it straightened or replace the engine.
To replace or straighten the crankshaft it will require engine tear down which requires knowledge and tools for small engines.

Check your tire pressure when your on it it will be lower

The blade is either bent from hitting something solid or it is about to become dislodged from the motor shaft and could hurt someone very badly,. Take spark plug wire off the spark plug, then lift mower deck up on two wheels and grab the blade to see if it is loose, tighten as needed. If not then visually inspect the blade, rotate it a few times noticing the depth of each side of the blade . If it is not rotating at the same height, in 360 degree rotation then replace it now.

Jack lawnmower up to give you enough room to use a impact on it

Your tires could need air, especially if it does the scalping while in a hard turn. The spindle could be cracked or the deck could be unlevel. Unless you hit something with the blades recently, I would check tire pressure first.

I hope this helps.

The blade should usually be placed so that the flat part of the blade is down, with the tapered part of the sharpened area up. Other than that, I would try to match pattern on the blade with the mower. Good luck...Lee

Look under the mower deck. If you can't see well and work on it, you may have to remove the mower deck and flip it over on the ground. Grass and mud buildup in the decj could cause a blade to pinch grass, 'scalping' the lawn. Clean it all out. Dull blades cause cut grass to look torn and brown. Remove and sharpen. Bent blade will cause uneven cut. Replace it. Good luck! Please rate if you found this helpful, thanks!

The more slinder blade goes on second. I just looked at mine and it was second or closest to the ground when on all 4 wheels.


Good Luck

raise the deck and drive up on ramps. remove blade retainer bolt then blade. be sure to notice which side of blade is down.