I bought a B7300 that had a blow D722 engine.....the guy I bought it from told me they replaced the D722 with a D662 engine. The engine runs good and smooth and cranks right up with no problems. I am interested to know if I replaced the D662 engine with the orginal D722 engine would it perform better. The only problem with this tractor that when mowing it wants to stall going uphill. I looked at the specs on the both engines not a lot of difference.
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