Jim Pemberton is the only one I would trust for this question

#4
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Jim Pemberton
2000 hours. The belt cooler makes a world of difference on that model.

My service guys tend to be very cautious, but having just interviewed them, they agree.

As Kevin suggested, make sure you check the tension every 100 hours
 
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check the belts for cracking across the belt. If you keep an eye on them they will give you plenty of warning before they will just snap. For tension, Deflection between the engine and the pump at the greatest distance should be between 1/2 to 3/4 of inch (Just push on it).
 
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My belts(370) lasted for at least 4-5 years. Maybe that goofy little frame fan does help.

Even when one finally did go, it just threw some teeth and thankfully it was very uneventful.

Changing them myself the first time was difficult. Would be much quicker now.
 

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