The Kohler motor blew up so I swapped it with a briggs intek 23hp motor. Just got the kinks worked out and drove it around for the first time today. First time for hearing the motor run and first time driving the mower. The only problem im having is it boggs waaaay down when I engage the blades. It picks back up after a second but just a little. It just about shuts the mower off. Anyone ever done a swap and have this happen?