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Anonymous Posted on Jul 28, 2013

I have a Craftsman YS4500 that when I engage the blades the start spinning slowly and kills the engine.

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Bill

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  • Contributor 39 Answers
  • Posted on Jul 29, 2013
Bill
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Joined: Aug 18, 2011
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Assuming any belt changes were correct..check the path of the belt to make sure it's not pinched in the guides..and with the blades disengaged and the engine off..that one of your blade hubs isn't seized up. On my exact model the blade pulley brake was originally installed wrong and engageing the blades did not release the pulley brake pad and it fully dragged on the pulley. Once I corrected this I confirmed its normal to slow the engine slightly during normal engagement but not stall at medium rpm.

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5 Related Answers

Dwain Pippen

  • 377 Answers
  • Posted on May 29, 2009

SOURCE: craftsman riding mower repair starter will spin but not engage

You need to buy a Starter Drive Kit. If you starter has a flat piece on top held on by a retaining ring, it's part # 696541. If you have the older type starter with roll pin holding the drive on, you need part # 696540. You probably have the first one. To install the retaining ring, use a 3/8 socket to tap it into the groove. Dwain

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Anonymous

  • 1627 Answers
  • Posted on Oct 31, 2009

SOURCE: Auger blades won't turn

You need what they call a "friction wheel" replaced.

colesmowers

  • 40 Answers
  • Posted on Jul 04, 2010

SOURCE: RE: Lawn mower blades will not engage

This sounds like a faulty ground condition, the PTO clutch requires a ground provided by the chassis wiring harness to function and a ground for the ignition switch to kill fire to the coils. The other components work as they should because the voltage regulator, fuel shutoff solenoid and starting interlock system have their own grounds. The ignition switch in these mowers is a large round plastic switch not capable of grounding itself, it should have a black wire leading from the terminal marked "G" on the backside of the switch.

to diagnose a faulty ground you'll need a basic 12V test lamp:

Unplug the switch and and install a the test light clip on the positive terminal of the battery, probe the ground wire in the unplugged harness that corresponds with the "G" terminal only. If the ground is good the lamp in the test light will illuminate brightly, if poor or faulty the lamp will not light or be noticeably dim.

Further verification of a faulty ground or failed PTO switch can be tested at the PTO Clutch harness, turn the key on, engine NOT running, and pull the PTO Switch to the engage position, with the test light clipped onto the Negative Battery terminal or chassis, back probe the connected PTO clutch terminals. If the PTO switch is good and the ground is good then Only one terminal will illuminate the lamp, if both wires illuminate the lamp then the ground is faulty, if no lamp illumination then a loss of power is suspected, check the terminals on the PTO switch and Ignition switch for power.

Typical Ground termination locations are on the frame near the rear of the tractor frame, above the transmission, in the steering column area and near the solenoid, check for a loose or corroded eyelet terminal, broken wire, or a missing fastener in these areas.

dannydoesita

  • 778 Answers
  • Posted on Jun 14, 2011

SOURCE: swisher 44" mower starts and runs but engine bogs

The engine in this machine seems to be powerful. If you can remove the belt from the pulley that drives the blade. Try turning the pulley buy hand. If it turns tight or not at all this is your problem. The unit that is the pulley to blade assembly is seized or ready to seize. Sometimes they are designed to be taken apart and repaired, and sometimes they are not. Did you check for a grease fitting within the pulley to blade unit?
I would like to hear how this works out for you. Best of luck.

BAMOUT

Dennis Key

  • 2481 Answers
  • Posted on Sep 30, 2012

SOURCE: cub cadet 1040 blades spinning when pto isnt engaged

Sounds like you forget a spring or the routing belts are
wrong.

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Does model # 917.276021 have a mower lock out on the transmission

The PTO when engaged draws a lot of power from the battery. Check the battery for proper voltage. If your battery is low or say 1/2 charge, it will never engage the blades and will die every time you try to engage the blades.
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I have a 3 year old ys4500, wont start

Have you tried bypassing the cut off switch, by joining the wires together
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Craftsman ZTS 7500 dies when engage blades or when engage transmission

check the "kill switch" they are usually located in the seating area. it senses for pressure or seat angle and will kill the mower if nobody is sitting on the mower. Good Luck
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Every time I use the lever to get the blades started it kills the engine. it does it even after i removed the belt. what is causing the blade rotation lever to kill the engine?

hi there talane

sounds like you have a safety switch problem

try disconnecting seat switch and retry if works could be wire grounding some where or faulty switch then try fitting a jump wire to seat switch wire connector then retry then check blade engagement switch may be playing up or a nuetral switch playing up but more likely a seat switch

with operator off seat and park brake on engine runs, but with pk brake off and operator off seat
engine stops , same if operator leaves seat and blades engages -engine stops,

if unit not in nuetral and pk brake not on unit wont start


take look

hope it helps

cheers pauly46
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Craftsman YS4500 won't turn over

low battery charge or the teeth on the starter gear is bad. the fly wheel should turn if the starter is engaging. i have disconnected the seat switch and it still turns over. the blade and parking brake switch will not let it do anything if disconnected. to change the starter gear only takes a few minutes after the covers are removed.
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What would cause my craftsman zero turn to die when i engage the blades?

First, sort out between two possibilities: 1. The safety system is killing the engine -- for example, if the seat switch is faulty or misadjusted, the engine ignition is killed when you activate the blade engagement switch. 2. The blades, spindles, or belts are binding or stuck, which would "drag" the engine to a stop. I suggest you remove the belt that drives the mower from the engine. If the engine still dies when you engage the blade switch, it's problem #1. Check all connections, and check the seat switch with an ohmmeter. If the engine does not die, then you have mechanical drag. With engine off and the belts taken off, turn each spindle to find out if one is frozen or binding. Good luck!
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Check your spark plug. Or maybe your choke is stuck
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42 inch Craftsman blades won't engage

model 917258862 mower was given to me. sat outside numerous years. I've managed to get it to start run and drive, but cant get blades to engage. don't know what the wires are for or do that go to some sort of pulley attached to the bottom of motor. can somebody help me pls ?
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I have 16 hp Craftsman riding mower with a Kohler engine.

It may think you are in reverse and is killing the motor to keep you from backing up with the blade running. Look for switch that is telling it when you are in reverse, maybe it is stuck with grass or other debris. another possibility is that the blades are jammed and they are stalliing the motor. Mines stalls easily when cold.
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