I have a 11 HP Craftsman riding mower. It has a 40 inch mow deck with two blades. I have recently worked on the mowing deck - replacing some bearings and the blades. When I put everything back together, I insured the blades were 90 degrees off from each other. After I start the engine and engage the blades, they go out of sync and hit each other. I have taken everything apart more than once to insure I wasn't doing anything wrong - the same thing happens again.

Any suggestions would be appreciated.

The model number is 502 255750.

MOWERMAN2468

If the blades are actually hitting one another, they are too long and are the incorrect blades. Now, it is possible that the deck could be warped or bent, allowing the blades to make contact with the deck body.

SkipB

I agree with MOWERMAN, timing mower blades ended years ago. Unless your machine is REAL OLD, chances are the blades are too long.

5060

if blades measure 20 inches they are too long should only be about 19 5/8 inches