About Us – GrassFlap
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GrassFlap, LLC is dedicated to making and selling only quality products for mowing professionals. Our designs have been field tested by local mowing crews to insure they work. Durability, convenience and fair pricing are important.

Why GrassFlap?

GrassFlap is the only all mechanical foot operated OCDC that completely clears the edge of the deck when in the open position. It only add ¾ inch (2 cm) to width of deck when closed. The GrassFlap has been developed through years of actual use in the field. The design makes it easy to operate. The rugged construction makes it tough. As a mowing professional you will appreciate how easy it is to operate and how much simpler it makes mowing in restricted areas.

Most discharge chute blockers operate with a hand lever which can get in the way. Lever operated blockers get dirty and become hard to operate which means they get use less and less. With GrassFlap the clean design is based on a pivoting motion, no slide to get jammed. The mechanical cable connects the pedal to the flap; this lets you know the position of the blocker plate with the feel of your foot. It makes it very easy to control and feather the discharge of clippings.

When it comes to reliable, easy to use and saving cleanup time with an OCDC the GrassFlap should be your First Choice.


How We Started

Cutting grass is fun, and having good equipment makes it even better. Over the years, I have cut grass with everything from a Farmall tractor with a belly-mount mower to the latest zero-turn riders. In the old days, I would blow grass "in" for the first few rounds and then turn it around and start blowing the grass "out" so it didn't pile up.

Then we got a professional walk behind mower, and everything changed. I didn't have to cut in squares any more; I could turn on a dime; I could cut strips and patterns. Nothing was the same, nothing except I still had to manage where I blew the grass.

We bought a chute blocker and took it home to install. We dumped all the pieces out and started trying to fit it on our mower. Nothing fit; it all had to be modified; it was not good. We returned it, and I made one myself. It was hand operated from the drive position, and it worked great.

Our next mower was a zero-turn that I modified the chute blocker to fit. Again the flap was hand operated. With practice, we learned to let go of the controls to flip the chute open or closed. It worked, but it was hard to do and not get out of line.

The next season, I figured out how to operate the flap with a foot pedal. It was crude -- a barn door hinge, a bent rod, a bungee cord -- and there it was. With the flap and foot pedal, it was now possible to close the discharge chute any time, any place. I couldn't believe how many times in a single yard I would use it: passing a tree, passing a flowerbed, passing someone trimming. I even found myself closing it just to turn at the end of a pass, to keep from blowing grass in the next yard. By the time the mowing season was over, the pedal was formed steel, the flap had welded pivots, and the unit would bolt on any mower. The GrassFlap was a reality.

– David Luking

Meet the Team

David Luking

Rebecca Rowan

Ben Luking

Maggie Luking

Support Materials

Learn More From Our Brochure

Frequently Asked Questions

Cable Installation Guide

Low Profile Install Guide

(For GrassFlaps starting with 41 & 44)

48K Install Guide

(For GrassFlaps starting with 48K)

49K Install Guide

(For GrassFlaps starting with 49K)

42B Install Guide

(For GrassFlaps starting with 42B)


(For GrassFlaps starting with 51)


(For GrassFlaps starting with 412T/413T)


(For GrassFlaps starting with 42J)

Heavy-Duty Install Guide

(For GrassFlaps starting with GF3)


(For GrassFlaps starting with 45)

Instructional Videos

Heavy-Duty GrassFlap

Installation on Walk-Behind Mower

Measuring the Discharge Chute Opening

GrassFlap Installation on a Zero-Turn Rider

GrassFlap on Riding Mower

GrassFlap on Stand-on Mower

GrassFlap on Walkbehind Mower

How to: Adjust the Spring Tension

How to: Remove the Nuts from Cable

How to Operate Pedal