Doesn't say what psi it can make, but I doubt it'll cause problems if the float / needle and seat are in good shape. Otherwise you'll see a lot of black smoke from the exhaust. If you're concerned of running to high a pressure you could always add a psi regulator, but I doubt it's needed.
I've been running THAT pump for over 11 years on no less than 4 tractors with no issue! BUT! It's your tractor, do what ya want, I know I will cause it works!That pump is WAY too big. You need the Facet 40177 or equivalent, which is 1-2 psi and 7 GPH. That is very close to the output of the original mechanical pump.
Had an 1811 with one years ago. We put one on my Dad's zero turn. Both were the 40177 and worked great.How many have you changed out and used and for how long!