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Linder'sLawnCare
04-26-2009, 11:18 PM
I have a Ferris 48/21 1500z with regular stock blades. I have noticed many missed "string" type grass such as weeds. I can cut well maintained grass full speed and never miss a piece. I have tried raising the deck height and same prop. I have slowed down, same prop. I read something about mowing at lower deck height will help, is that true? I think blades or blade set-up is what I need. Thanks for the advice and ideas.

Lehighlawnpros
04-27-2009, 12:01 AM
Hi LLC,

To get a good cut on weeds you'll probably need
sharp "high-lift" blades (assuming that you're side discharging) and cutting lower may help as well.

However, cutting too low may be detrimental to the
grass so check your local recommendations.

Also, check your manuals to find the correct "deck pitch" for your machine and see if it is set correctly.

In many cases the front of the deck should be a little lower than the back of the deck.

We take kind of an opposite approach here, we mow our St. Augustine high
(mulching with medium-lifts at 4") and miss some weeds (due to less vacuum/lift)
but we count on the resulting healthier/thicker turf to
eventually minimize the weeds. Granted, this is a longer term solution.

Just some ideas,

Bob
Lehighlawnpros

Cajun Country Lawn Care
04-27-2009, 12:07 AM
I do not know if this is good or not but I have lowered my deck heigth om most of my properties and this is taking care of the weeds. Most are being cut at 2.5.:usflag:

Linder'sLawnCare
04-27-2009, 08:26 PM
Thanks guys. I have been cutting at either 3 or 3.5 in. I will lower to 2.5 and see how it goes. As far as mulching blades go, I was wanting hi-lift mulching blades for better lift and suction. Will mulching blades mess up the cut in any way? Also my mower is two weeks old so hopefully the pitch is still good.

Lehighlawnpros
04-27-2009, 08:54 PM
LLC,

Be sure to find out what cutting height is appropriate for your grass types,
if it's St. Augustine I wouldn't recommend anything lower than 3.5 inches.

Mulching blades generally don't have a high lift
so that they don't pack the top of the deck with clumped clippings. Medium/low lift is standard for mulching.

Mulching (with a full mulch kit installed) leaves a nice cut with our machines, but you can probably get better results
cutting the weeds you mentioned by side discharging and using regular high lift blades.

Sometimes the dealer doesn't set the pitch correctly on new machines, so it's not a bad idea to check it yourself.

Also, don't trust the height indicator to be accurate,
one way to know your actual cutting height is to park on level concrete (with correct tire air pressures)
and measure from concrete to blade tip. You can check the pitch by comparing the front tip measurement to the rear tip
(rear tip should generally be 1/8" higher or so,
your owners manual should have the specs for your machine).

Bob
Lehighlawnpros

Linder'sLawnCare
04-27-2009, 10:30 PM
Thanks. You know a lot! I do believe you about the deck height being off. When I got my Ferris I began to cut at 3" and my dad beside me on his Scag was at 3" also. His mower was cutting a good 3/4" shorter than mine:confused:. I do think that 3" on my Ferris is also a little high. I will measure like you said the next chance I get. I cut some St. Augustine on 2" before and it came out real pale but I will not do that again. I mainly cut Bahia and centipede as well as weeds:hammerhead:

lsu03
04-27-2009, 10:44 PM
i cut at 2.5...SOME at 2.25 for what its worth.....the grass around here isnt great so if you leave it tall it doesnt look good

tacoma200
04-27-2009, 10:46 PM
I have a Ferris 48/21 1500z with regular stock blades. I have noticed many missed "string" type grass such as weeds. I can cut well maintained grass full speed and never miss a piece. I have tried raising the deck height and same prop. I have slowed down, same prop. I read something about mowing at lower deck height will help, is that true? I think blades or blade set-up is what I need. Thanks for the advice and ideas.

I agree with Lehighlawnpros. Weedy lawns here require a lot of lift, though they advertise high lift mulching blades they generally do not have as much lift. Of course your grass and weeds are more rigid than ours but that is what works here and lehighlawnpros seems to agree. Try very sharp high lifts, cut a little lower and see if it helps. I haven't cut grass that far South so I very well could be wrong. Good luck!

Linder'sLawnCare
04-27-2009, 10:50 PM
I am going to order both high lift and high lift mulching blades. I can use both anyways. Mulching for fall and spring and possible year round if they work well.

Linder'sLawnCare
04-30-2009, 10:14 PM
Hey guys I have good results. I began to mow at 2.5" and it did the trick. but I cannot do that for all my yards so i am still going to try a highlift blade.

david shumaker
04-30-2009, 10:23 PM
I have to lower the blades for weedy lawns. If the yard is all weeds, it doesn't matter if mowed low because there is no grass anyway. I have a couple yards that only have a blade of grass here and there. The yards need complete renovation, but the customers don't want or can't pay for it.

Linder'sLawnCare
04-30-2009, 10:39 PM
I agree and I have the same problems