i almost always ask the customer if they REALLY like the bail bar setup and no throttle as it is easy enough to fix just by moving the kill tab to the throttle plate and the brake goes bye bye maybe 1 out of 5 like it the way it is , most didnt know you can do it .
most of then have oily looking gunk too if they work hard as yours seems to look like it does and probably was parked because of the vibrations . it scares people LOL then they forget it and it wont start after a while sitting with old fuel , while your at it fit an inline tap and advise them to run it low on fuel when season is done then less damage .
