JD 4210 losing power after 45 minutes of mowing

[wbeech]

I have an eHydro John Deere 4210, the last three times after 45-60 minutes of mowing, with a 5' shredder, in not particularly deep grass the machine will start to bog down at the slightest challenge. I have not let it die but I am sure that if I kept my foot on the pedal it would have. Runs just great at the begining, fully serviced about 60 hours ago by the dealer.
The temp guage is staying within the green range.
Thanks!

 

[jaxs]

Tough old beasts that are hard to kill for sure.
Is the governor working at the outset? What about after warmed up? Diesel or gasoline?

 

[Roadworthy]

It is probably not impossible that your vented fuel cap is plugged creating a partial vacuum in the tank over time. It is also possible the output to the tank is partially blocked allowing fuel to flow at a less than ideal rate. You can disconnect the fuel line out of the tank and check the flow observing if it slows over time. Of course you'll want to catch it in a clean container for return to the tank.

 

[Bavarian]

Maybe a fuel filter has a slow leak and allows air to get sucked in that builds up over time.