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Highland co. Ohio | Replace the broken bolts first, get the upgrade kit from jd. My 8310 with the update was doing it last year only under full load full rpm. I took the alternator in to be checked out, replaced the alt/ac belt and tensioner thinking that was it. Finally found the rear exhaust manifold bolt about a half turn loose. Tightened it and retorqued the others and has been fine since. | |
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