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Hi,

I have a Craftsman riding lawn mower tractor (model # 917.273390).

So the issue is that when I shift the gears for it to go forward or in reverse it does not move at all. It nudges like an inch and then stops

I removed the back plate which basically protects the transmission and pulley area and noticed that when the tractor is in idle the pulley is spinning fine (the pulley is connected by a belt which is run by the engine). The pulley sits right on top of the transmission.

When I shift the gears in forward or reverse the pulley stops spinning. I'm guessing that either the belt is not tight enough or something is broken inside the transmission.

Also when I manually pushed the tractor I noticed the pulley spinning.

Any ideas?

Thanks!

P.S. Here is a link to the transmission diagram - http://www.searspartsdirect.com/par...P0702050/00001?blt=06&prst=0&shdMod=917273390

I am going to guess that the belt has came off a pulley.
Look at all the pulleys make sure they all look good and spin.

If your belt looks a little thin or has cracks replace it

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With the mower off put it in gear with clutch Pedel up. The belt should be tight

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Check the key 8A in the parts list on pulley.

EngineMan said:

Check the key 8A in the parts list on pulley.

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I thought about that at first but put it to the side when he said the pulley turns wham he would push the mower.
But I guess I should have started with that.
I got a mower from a man that said the trans was no good and it was a key on one of the wheels

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And when put in gear the pulley stops turning tells me the belt is to lose
The pulley turns when not in gear then stops when put in gear means the belt slips with resistance

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