New Holland TC-25D Boggs Down After Warmed Up

[scott wassell]

My 1999 New Holland TC-25D bogs down after about 45 min. of operation in warmer weather (60 degrees F +), especially when climbing hills while mowing. In the winter when I plow, it runs fine with no incident.
The air filters seem fine, although they are about due for replacement. I havent replaced the fuel filter yet .... nevertheless, I would think filter issues would show up right away, not after 45 min. when it's been warmed up for a while. When my son rides it and it happens, he says he really feels it when he's turning.... any ideas?

 

[RickB]

Procrastinating on the fuel filter change serves no purpose. change the filter. Additionally, your symptom sound a lot like a diesel tractor with a dose of gasoline in the fuel tank. Make sure it doesn't.

 

[scott wassell]

Yeah, that's definitely my next step, shouldn't have put it off.... pretty sure it's not gasoline in the fuel though.... have been through a few tanks with the same problem.