How to Maintain a Push Reel Lawn Mower Properly
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Push reel lawn mower maintenance mostly comes down to two jobs: keeping the reel blades sharp and keeping the cutting bar, called the bedknife, set close enough to the blades that they cut against it. A reel mower cuts by scissor action rather than by impact, so when either job slips, the grass tears instead of cutting cleanly. This guide covers how to adjust the bedknife, how to sharpen reel blades with a grinding compound, how to recognize when a mower needs attention, and which mowing habits keep the blades working well between sessions.
Quick answer
- Adjust the bedknife so it barely brushes the reel blades, tightening or loosening the front and back screws by the same amount.
- Sharpen the reel by coating the cutting edge with grinding compound and turning the reel backward for about 10 minutes.
- Signs that the blades need attention include frayed or torn grass, an uneven cut, and a blade that cannot slice a piece of paper cleanly.
Why a reel mower needs maintenance
A reel mower is a set of spinning blades that pass across a fixed cutting bar. Each grass blade is caught between the two and sliced. That design gives a clean cut, which is why reel mowers are often recommended for lawns that need a neat finish. It also means the mower has two surfaces that must stay in relationship: the edge of each reel blade and the edge of the bedknife. If the blades dull, the grass is pulled rather than sliced. If the bedknife drifts away from the reel, the grass is missed entirely at the bottom of the cut. Maintenance is simply the habit of keeping those two edges in contact and sharp.
The listings for several push reel mowers in this group emphasize the same design point. The Great States 304-14 says its blades are heat-treated alloy steel “for staying sharp longer,” and the Scotts 304-14S describes a 5-blade ball bearing reel with an adjustable cutting height. Staying sharp longer still does not mean never needing sharpening. Plan to check the mower through the season rather than waiting for a visible problem.
Step one: check the cut before you change anything
Before you adjust or sharpen anything, check the mower on a flat patch of lawn. Push it forward at a normal walking pace and look at the grass after the pass. Clean, pale cut tips that look sliced usually mean the blades are sharp and the bedknife is close enough. Ragged or frayed tips suggest dull blades or a bedknife that is too far from the reel. Uneven cutting, with some patches cut and others left, can point to the bedknife rather than the blades, so it is worth separating the two possibilities before you disassemble anything.
Also check the mower’s cutting height. The pack listings for reel mowers in this group describe a limit of about 4 inches of grass for a single pass, and several recommend mowing when the grass is dry. The American Lawn Mower listing advises mowing no more than one third of the grass blade at a time and increasing the overlap when grass reaches 4 inches or more. A mower that is repeatedly asked to cut tall, wet grass will look dull even when its blades are sound.
Step two: adjust the bedknife
The bedknife is the straight cutting bar in front of the reel. It is held in place by screws at each end, and its position sets how close it sits to the spinning reel. The housedigest guide on sharpening push reel blades describes the adjustment this way: check the mower’s manual for brand-specific instructions first, look at the underside of the mower to find the bar, and adjust its screws until the bar “barely brushes the blades.” Tighten or loosen the front and back screws by the same amount so the bar stays level, and then confirm that the reel still turns fairly freely while the bar lightly touches it.
The adjustment has to be made by feel and by checking the cut, not by a number from memory. If the reel binds or stops, the bar is too tight, and it should be backed off slightly. If the grass is still being missed after the bar is set, the bedknife may be too far from the reel, and a small further adjustment may be needed. Make one small change at a time and check the cut after each change.
Step three: sharpen the reel blades
When the blades are dull, the usual method is to sharpen the reel with grinding compound. The same housedigest guide describes the process in these steps. Coat the cutting edge of the reel blades evenly with grinding compound, using a paintbrush so the coating reaches all around the edge. Remove the wheel on one side of the mower with a flathead screwdriver, then remove the exposed gear. Attach a drill to the drive bar, or use the manual handle from a sharpening kit. Hold the wheel off the edge of a table or platform so it can spin freely, and rotate the drive bar in reverse for about 10 minutes.
After sharpening, clean off the compound, put the gear back on and reattach the wheel. Lubricate any moving parts as the manual describes. Then test the mower on the grass. If the cut is still uneven, sharpen again or readjust the bedknife, because a freshly sharpened reel will not cut evenly against a bedknife that has drifted out of alignment.
Handle the reel blades with care at every stage. The edges that make the mower work are sharp, so keep your fingers clear of the cutting edge when you turn the drive bar, and work on a stable surface. Stop and check your work when the reel is not turning freely.
Tools that help with the job
A dedicated maintenance kit can cover the grinding side of the work. The Fiskars Push Reel Lawn Mower Blade Maintenance Kit includes lapping compound, an application brush, two fittings, a hand crank and step-by-step instructions, and the listing says it is designed for Fiskars StaySharp reel mowers and most standard push reel lawn mowers. Its listing states a one-year warranty. The kit is a practical choice when you want the grinding compound, brush and crank in one package rather than sourcing each part separately.
For touch-up work between full sharpening sessions, a hand-held reel mower sharpener can be used directly on the mower without removing the wheel. The SK-2 sharpener listing describes sharpening the reel blade and bed knife while the blades are still on the mower, and it says the tool is compatible with reel mowers from several brands. That approach suits light maintenance, but it does not replace checking the bedknife adjustment after the work is done.
If you are choosing a mower rather than maintaining one, look at the listing’s blade count and cutting width before anything else. The Scotts 304-14S listing describes a 14-inch cut with a 5-blade reel and 8.5-inch composite wheels, and it states an adjustable cutting height of 0.5 to 1.75 inches. A mower with a clear height range is easier to adjust and to check against the cut, because you know which range the bedknife was set for.
Signs the reel needs attention
Frayed or torn grass is the most common sign. Reel blades that are sharp leave clean tips, and blades that have dulled leave grass that looks shredded or bruised. An uneven cut is the second sign. If some strips look cut and others look untouched, the bedknife is probably out of alignment, or the reel is not turning evenly. A simple check is to try cutting a piece of paper. A sharp reel slices it cleanly, while a dull one pushes or tears it. Use the paper test every few sessions so you notice the change early.
A mower that needs more force to push than it did last season can also point to a problem. The housedigest guide does not list that as a sign by name, so treat it as a prompt to check the bedknife setting and the reel’s free movement rather than as a confirmed diagnosis. If the mower binds, stop and inspect the reel and bedknife before continuing.
Mowing habits that protect the blades
Reel mowers work best on lawns that are already maintained. The Great States 204-14 listing says that if a lawn is overgrown with divots and tall weeds, the lawn should be worked on before using a reel mower, or the mower will need several passes the first time. Clear sticks, stones and other debris from the lawn before mowing, since a hard object can damage the reel and bedknife. Mow more often rather than letting grass grow long, because a reel mower only cuts what sits between the reel and the bar, and the grass has to stay within the cutting range.
The listings also recommend avoiding wet grass. The Great States 204-14 listing says reel mowers usually produce a very uneven cut when used on wet grass, and the American Lawn Mower listing advises against mowing wet grass with a reel mower. Dry grass is less likely to clog the reel and gives better footing. If you must mow a damp lawn, expect a less even result and check the blades afterward.
Overlap each pass slightly. The American Lawn Mower listing advises increasing the amount of overlap when the lawn reaches 4 inches or more, and it describes taking smaller amounts more frequently instead of letting grass get long. A lighter, more frequent mow is easier on the reel and gives a neater finish than one heavy pass through tall grass.
Keeping a schedule
A simple schedule is enough for most home lawns. Check the cut each time you mow, and run the paper test every few sessions. When the cut starts to look ragged, sharpen the reel and then check the bedknife adjustment. Keep a record of when you last sharpened the blades, because a mower that is sharpened on a steady schedule is easier to manage than one that is only attended to after a problem shows. The owner’s manual for your model is the authority on the exact steps and any warranty conditions, so keep it with the mower.
Sources
How To Sharpen Manual Lawn Mower Blades, HouseDigest
FAQ
How often should a push reel mower be sharpened?
There is no fixed interval in the sources used here. Check the cut each time you mow and sharpen when the grass starts to look frayed or torn, or when the cut becomes uneven. The paper test is a quick way to catch dull blades early.
Can I sharpen a reel mower without taking the wheel off?
The sharpening method described in the housedigest guide involves removing a wheel and the exposed gear so the reel can be turned. Some hand-held sharpeners are described as working on the blades while they are still on the mower, which suits light touch-ups. Read the instructions for the tool you choose.
What is a bedknife and why does its setting matter?
The bedknife is the straight cutting bar in front of the reel. The reel cuts grass against it, so if the bar sits too far from the blades, grass is missed, and if it sits too tight, the reel binds. Set it so the bar barely brushes the blades and the reel still turns freely.
Why does wet grass matter for a reel mower?
The Great States listing says reel mowers usually produce a very uneven cut on wet grass, and the American Lawn Mower listing advises against it. Mowing dry grass gives a cleaner result and reduces clogging.
What cutting height is right for a push reel mower?
The listings give adjustable ranges that differ by model, for example 0.5 to 1.75 inches on the Scotts 304-14S. The American Lawn Mower listing says the mower handles grass up to about 4 inches in a single pass. Set the height for the grass you have, and do not expect a reel to cut long grass in one pass.
Is a maintenance kit worth buying?
A kit helps if you want the grinding compound, brush and crank in one package. The Fiskars kit lists those parts and a one-year warranty. If you sharpen only once in a while, a complete kit is simpler than sourcing each part separately.
Bottom line
Keep the bedknife set so it barely brushes the reel, sharpen the blades when the cut turns ragged, and run the paper test every few sessions. Mow dry grass at a height the mower can handle, and mow more often rather than letting the lawn grow long. Those habits do most of the work of push reel lawn mower maintenance.
