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My 446 starts well when it is cold (cranks pretty well...but not vigorously). However, twice I've had the tractor stall because I struck a object bother with my mower and today with a snowblower. When this happens the tractor won't crank over (i hooked it up to my car and it cranked vigorously and started right up. I know the battery is old and I assume this is the issue. Any idea why it would be so hard to crank when the engine is hot?
 

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Do a load test on battery. Next would be to check all the wiring connections, for cleanliness,tightness and don't forget the grounds too.
 

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Do a load test on battery. Next would be to check all the wiring connections, for cleanliness,tightness and don't forget the grounds too.
Good Call...I'd change the battery and be done with it...if when you jump it it always starts, why try to reinvent the wheel...I am not one to diagnose problems or issues by 'throwing money' at it and hoping it goes away. But, in this case you've indicated that when the voltage from a Jump hits it...it starts without hesitation...I don't see the issue here...

Battery and DONE...

Good Luck
 

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You aske WHY, it is harder to start when hot. Well put simply, heat in any type of electrical curent flow is "resistance" and the working power in your tractor battery is not quite to par, By that I mean the Amperage is below the minimum required to turn your engine past compression. By borowing more Amperage from your boosting battery, in this case your truck, you manage to push past the compression and wammo, the engine stats.
Also, your Ignition coil requires a good more amount of amperage to charge and fire when hot (again resistance).
Add this all up, and it simply means your curent tractor battery is at its end. it can no longer hold enough amperage, My guess one of the cells is probably boiled dry.

Get a new battery, and this will all work out.
Cheers
Jayvee.
 

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I agree that it is most likely the battery but I would make sure that the battery connections are good first. Wish full thinking but depending on how you hook up the cables you could be bypassing this connection.
 
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