governor broke on 11.5 HP Briggs riding mower

[Bill]

10 yr old Lowes MTD style rider. Great shape. The other day while mowing the engine just started reving way beyond normal so I hit the kill switch and cut the motor off. I don't believe any damage was done. Throttle has no effect. Just starts in way high mode. Took to shop and they say internal governor is broke and the engine must be pulled apart, repaired and re-assembled. Big Job they say. $200 minimum labor. Does this sound right? Anyone have experience with this? Thanks - Bill

[Meat Plow]

The governor inside the engine shroud operates from the air pressure created by the fins atop the flywheel. Less pressure, more throttle. Or in your case broken and the throttle spring pulls the throttle open if this is the case on you motor. I don't know of any other kind that would be "inside." I would think $200 is a bit steep unless it's really hard to get to which usually isn't the case.