BX won't go in reverse.

[Love my BX24]

I have a BX24. I've read other posts on here about this problem so I checked the safety shut-of for the seat and topped up the hydraulic fluid. I even boosted the battery but it still stalls as soon as I push down on the reverse pedal. One other thing - the exhaust is black at start-up. Any suggestions?
Thanks

 

[85Hokie]

So it goes forward with no problems?

 

[Love my BX24]

So it goes forward with no problems?

It struggles to start in this cold weather, but once it starts it's fine.

 

[North Idaho Wolfman]

I have a BX24. I've read other posts on here about this problem so I checked the safety shut-of for the seat and topped up the hydraulic fluid. I even boosted the battery but it still stalls as soon as I push down on the reverse pedal. One other thing - the exhaust is black at start-up. Any suggestions?
Thanks

It struggles to start in this cold weather, but once it starts it's fine.

If it's only stalling in reverse its more than likely an issue with the HST safety switch.