620 bogs down on hills

[johndeerefarmer]

My 620 will bog down on even the smallest hill. This is me driving with no load on the tractor. If I put it in third gear and drive across the pasture and I come to a small slope it will stutter, act like it wants to die and then speed back up and keep moving.

Last week the carb was clogged and it wouldn't run unless the choke was out. Adding some additive to the fuel took care of that but it still has this problem.

Do you think the carb is still partially clogged? I have a carb rebuild kit but don't want to tear into it until I am sure. I also wondered if it might not be the governor? but when I go down a hill I can hear the governor slowing the engine down so I suspect it's ok

Thanks
blog on my Deere 620

 

[MSD]

Only way to really get a duplex carb clean is to remove the balls and use a bit to clean the passages.

 

[johndeerefarmer]

Thanks

 

[Mike M]

If it still has the auto fuel shut off look in at the stem that drops down as it is running and make sure the rubber washer drops down with the stem. Had on sticking to the top once and they won't get enough gas to run right. Also have seen several of these with the passage in them partially clogged up too as it is a pretty small passage and it makes a 90* turn on it's way thru it.

 

[johndeerefarmer]

Thanks.