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Old 08-06-2013, 02:35 PM
MGH-PA MGH-PA is offline
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Is this a blade sharpening issue?

My Gravely 148z has started cutting a little off recently (last two cuts). I notice it only on the bottom half of the yard where the grass grows ever so faster than the rest of the yard, and it's the most elevation. I installed factory mulching blades last year mid season, and they were working fine. Now, the mower seems to be clumping the grass sporadically our of the discharge, instead of spraying like a mulching blade should. I'm not mowing when it's wet, either, so we can rule that out.

Take a look at the picture. Notice all of the clumps. What do you think?

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Old 08-06-2013, 03:41 PM
shiplemw shiplemw is offline
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Have you sharpened the blades at all?
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Old 08-06-2013, 04:46 PM
Ormond32176 Ormond32176 is offline
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Could be blades are too dull, you are cutting too fast, the grass has more moisture there, or any combination of the above imo.
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Old 08-06-2013, 04:58 PM
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Greg78 Greg78 is offline
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Are these "wavy" mulch blades? When were they last sharpened (hours)? I've never had good luck using a wavy mulch blade to side discharge. If they were working fine then first things I'd check is 1. Are blades sharp? 2. Is deck clean?
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Old 08-06-2013, 05:01 PM
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If they very ends are worn away or rounded it is time for new blades. Even homeowners should sharpen every 8-10 cuts.
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Old 08-06-2013, 05:26 PM
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Mulching blades while side discharging?

Why?

Put regular factory high lifts on and enjoy your cut.

Mulching blades are for mulching.

This years batch of crabgrass is insane...if you have any of that or other "wet" weeds, clumping like this is common on a lot of decks. Try lowering your RPM's or mowing more often.
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Old 08-06-2013, 05:34 PM
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Are you mulching, meaning the discharge chute is blocked? Or, are you side-discharging? If the latter you DON'T want mulching blades. I feel like a broken record, but "mulching is mostly a fantasy". Unless you are cutting EVERY 3rd or 4th day...just side-discharge with the best blade for your regional grasses. This could be a hi-lift, or a med-lift, or a G5 or G6...or a Gator 3in1. Experiment and have options ON HAND. It really does make a difference. To say there's ONE BEST BLADE is yet another fallacy.
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Old 08-06-2013, 07:41 PM
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Snyder's Lawn Inc Snyder's Lawn Inc is offline
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Does it have a Rpm tach if not take it in see if the RPM back off
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Old 08-07-2013, 12:26 PM
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Quote:
Originally Posted by Valk View Post
Are you mulching, meaning the discharge chute is blocked? Or, are you side-discharging? If the latter you DON'T want mulching blades. I feel like a broken record, but "mulching is mostly a fantasy". Unless you are cutting EVERY 3rd or 4th day...just side-discharge with the best blade for your regional grasses. This could be a hi-lift, or a med-lift, or a G5 or G6...or a Gator 3in1. Experiment and have options ON HAND. It really does make a difference. To say there's ONE BEST BLADE is yet another fallacy.
In tall grass that is somewhat wet, a mess will be made either way...at least on the properties we have here. I have found the best combo is a plate with stock or wavy blades in the summer and a full kit with wavy in winter. Mulching works great in the right conditions. I wouldnt much if i was cutting bahia or EOW lawns. But weekly st Aug lawns mulching works great. Plus i can trim and blow clippings in the lawn and chop em up.
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Old 08-07-2013, 12:40 PM
MGH-PA MGH-PA is offline
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Thanks everyone. I'm a complete new guy to this, so I'm learning as I go. They are the wavy blades. I had assumed (incorrectly) that mulching would eliminate clumping, not the other way around. I'm an idiot. I don't have a tach, but speed could be a factor. It only seems to clump when I'm making a pass UP the hill.

Length could also be an issue, but I'm mowing once a week, and frankly, as a homeowner with more important priorities (I like construction projects), it's about as often as I'm prepared to mow.

I don't even know what species of grass it is to help you out, that's how ignorant I am.
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