Big Dog Alpha MP Mower Warning

Mowing Three Acre Paradise can be a challenge, there are over 400 trees here so a zero turn mower is the logical choice. When shopping for a mower in 2015 I came across the Big Dog brand at a local dealer, these are manufactured by the same company that makes Hustler mowers which have a good reputation. Many of the parts are interchangeable so I don’t know if the Hustler brand has this same problem.

Like many zero turn mowers, this one is steered using two levers which you push forward or pull back. One lever controls the right drive wheel and the other controls the left. These mowers are fairly fast and are able to turn without moving forward, that’s where they get the name zero turn. For steering around a lot of trees this is a great design.

The problem I had recently is that one of the control arms came disconnected from the pump that controls the drive wheel. This happened as I was approaching a tree, when I went to steer there was no response and I hit the tree straight on (I was only a few feet from it so there was no time to do anything else).  Here’s a picture of the part that came unattached:

Big Dog Alpha MP drive lever warning

The problem I have with this is two fold. First, the only thing holding this on was an E clip which vibrated itself out or maybe got pushed out by some debris. In my opinion this should have been held on more securely with something like a washer and split pin (cotter pin).

Big Dog Alpha MP fastener

The second issue I have with this is that the pump did not return to the neutral position. When the arm disconnected, there should have been a spring that brought the lever on the pump back to center.

Here’s the arm reconnected with an E clip. Sometime in the future I’ll remove the arm again and drill a hole in it so I can add a split pin.

Big Dog Alpha MP control arm reattached

Why such a big deal? When I mow there are plenty of other places where this could have come out a lot worse. I could have ended up in the pond and caused a lot of damage to the mower, in the street while a car or truck was driving by and been hit (the road I mow by has a 45 MPH speed limit), or by the bike path when a bicycle or pedestrian was nearby. A lot of people mow in similar areas so this is not unique. As it is, the only real damage was to the front of the mower:

Big Dog Alpha MP tree damage

Keep in mind this is a 2015 model, not some 10-15 year old worn out mower. It currently has just under 124 hours of use.

Big Dog Alpha MP danger

If you are considering purchasing a Big Dog Alpha MP then I’d suggest you look at this to see if the design has been changed (and Hustler mowers). It’s a simple thing but could have really bad consequences.

Now, back to our usual programming. Stay tuned for an update on activities at Three Acre Paradise 🙂

Leave a Reply