My Craftsman Lawn Mower (dual blade, hydrostatic drive, 42" cut) has a problem when cutting going down a hill, in fact, when going down a hill the blades seem to stop turning completely and not cut at all. Mower cuts fine going up hill when engine is pulling but doesn't cut at all when engine seems to be braking.
SOURCE: Craftsman 42 inch riding lawn mower is not cutting evenly
The first thing to check is your blades. If one is bent, it will never cut even. It happens a lot hitting roots, antbeds, etc. Mulching blades will bend easier than a straight blade. It's best to take them off and lay one on top of the other to see if they're bent.
SOURCE: Cuts lawn uneven, one side shorter than other
Was it cutting uneven before you changed blades? If so, you may not have gotten the blade on the shaft correctly. There is an adjustment in the center of the deck hanger on each side. You can turn the 9/16 nut up or down on each side to level it out.
SOURCE: duel blades on craftsman riding mower cut unevenly
check the front tire air pressures then for a bent blade
SOURCE: I have a 15.5 HP Sears Craftsman 42
I'm betting that you need a new safety kill switch - probably the one underneath the seat (the spring-loaded plunger switch that won't let you use the machine without your *** in the seat). Could also be the one behind the "dash" that is associated with the blade engagement mechanism.
I know that the under-seat-switch cannot be bypassed or it will disable the machine in the exact way that you described. Why do I say this? Because I just tried to bypass my own "***-in-the-seat-safety-switch" on my very own 15.5 HP, 42" Sears tractor, and it responded by punishing me - the absense of the switch caused the motor to cut out when I tried to put the machine in gear AND/OR engage the blade. It seems to have some measured capacitance - the absense of same seeming to interrupt the ignition timing enough to shut the motor down when you attempt to get anywhere past neutral or engage the blade. These "safety" switches may be needed by a very few who prefer to be drunk while they mow lawns on steep slopes that their tractor mowers were not designed for, but I find these items to be troublesome and enfuriating. My trees shed a lot of sticks in high winds, and I can't stand shutting the machine down and restarting it EVERY SINGLE TIME I have to dismount to clear sticks or other obstructions out of my mowing path. This is an obnoxious, "nanny-design" feature that desparately needs to be discontinued. It also makes both jump-starting the tractor and electrical troubleshooting much more difficult than they should be. The tractor should let you dismount without shutting down, as long as you have disengaged the blade and shifted into neutral. It should also let you jump start with jumper cables - impossible to do with your rear end in the seat. By the way, call Manufacturer's Supply, Inc. at 1-800-826-8563. They may have a replacement - their item number 31-9664 might do it, but talk to them first. I'm calling them tomorrow. Good luck.
Testimonial: "VERY THOROUGH - THANKS"
SOURCE: Craftsman 42 '' 19.5hp lawn tractor gear shift
the belt is bad if not there is trouble in the drive shaft.Thank you for asking and I hope this helps you.Please leave me a 4 thumbs up.
Testimonial: "Good to know. Thanks for the quick reply."
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