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Barrette's Small Engines Inc. - SmallEngines.ca FAQ's

Why am I leaving an uncut strip of grass with my riding mower?
It is likely that one, or a combination, of the following five scenarios is resulting in the uncut strips.

  • The wrong size blades have been installed.

  • The blades are installed upside down. *Please make certain that you have the correct blades and they are installed properly.

  • The blade tips are worn. To correct this, replace the blades.

  • Overlapping may be insufficient. The tires push down grass during each pass. If you line up your tires with tire marks from the previous pass, the grass does not get a chance to stand back up during either pass. Overlap more than the width of your tires on subsequent passes. This will allow the blades to draw up the trampled grass from each previous pass and should produce a nicer looking cut.

  • Making sharp right hand turns. Twin-blade mower decks are designed with the discharge on the right side and two side-by-side blades. The side-by-side twin blade decks have the left hand blade positioned slightly forward and in front of the right blade. This provides cutting overlap when traveling in a straight line. As a result, the tractor should mainly operated making primarily left hand turns when cutting. During left turns this cutting overlap is maintained. If turning right when, it is possible to negate this overlap and leave an uncut strip.

  • Improper cutting deck adjustment may produce a vacuum imbalance that, under certain circumstances, could cause the air flow to push outwards from front of the cutting deck. Most of our deck designs are of "free floating" design. Free floating decks should not have the anti-scalp wheels touching the ground when the tractor is positioned on level surface. Free floating decks should be adjusted so that the front deck lip is approximately 1/4"-3/8" lower than the rear lip of the cutting deck. This relationship and adjustment should be maintained throughout the cutting height adjustment range. If the nose of the deck is higher than the rear of the deck improper air flow underneath the deck may result. Improper vacuum underneath the deck can negate the necessary "lift" needed to stand the grass blades erect for even cutting. If the lawn has bare spots, or lacks a healthy lush character, this too can cause vacuum leaks, especially pronounced in the higher cutting settings where the grass blades are further spaced at the tips and vacuum leaks may become more pronounced. Please consult the tractor Operators Manual for specific Deck Leveling and Deck Engagement adjustments pertaining to a specific model tractor.

     






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