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Permagreen Magnum sprayer output

Discussion in 'Pesticide & Herbicide Application' started by MySide, Sep 14, 2013.

  1. MySide

    MySide LawnSite Member
    Messages: 32

    I have a 2008 Permagreen Magnum B2B spreader sprayer, bought used 2 years ago with 40 hours on it. I've only spread with it so far but want to start spraying. It's running 3600 RPM and I read where it shouldn't go over 3450, but the tach quit on me today. So help on that is accepted.
    Question is: How wide is your sprayer spraying? How many gallons per thousand square feet are you getting? When I drive it down the driveway spraying -- low gear, high gear sprayer nozzle -- it doesn't cover the drive very well. I'm concerned about getting adequate coverage / results.
  2. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,721

    Rpm 3600 is fine--ideal in my opinion. A Honda can handle it. Use high gear. With a little luck you should be covering around 11 square feet wide. Allow for a bit of overlap and you should cover about 5 feet out on both sides, 10 feet effective swath.
    Not sure, I think your output should be about one-third of a gallon per thousand sqft, (about 43 ounces).
    At 4 miles per hour,(352 feet per minute) if you cover a ten foot swath, you cover 3520 sqft per minute.
    You need 151 ounces output per minute, (about 1.2 gallons per minute).

    This will work fine. No need to soak the weeds with water. Lightly wet is fine. Let the chemistry do the work. If you are worried about the amount of solution...drive in low gear for the first few weeks (after adjusting to a suitable tank concentration).
  3. MySide

    MySide LawnSite Member
    Messages: 32

    thanks! may need a new pump. only getting a gallon a minute and not spraying quite that wide. I wish they had a 3-4 nozzle boom option.
  4. gebby

    gebby LawnSite Senior Member
    Messages: 712

    Check to make sure that the pulley and the belt are both tight enough. My key on my pulley had loosened on me earlier this year. That pulley also runs the spreader. Check your nozzles for any blockage. If you have any type of filter(s) make sure they are also clean. Any lines kinked? Its something simple. Put it in neutral, sit still and pull the sprayer at full throttle, measure your width. It should be 11 ft. or close to it. I have a book that tells how much approximately that should come out. If you ask 10 different guys, I'll bet you get 10 different answers. Most guys adjust to their piece of equipment. Since the pump hasn't been used much, anything is possible. Just my opinion
  5. gebby

    gebby LawnSite Senior Member
    Messages: 712

    The book says 90 oz. in 60 seconds in high gear at 3450 rpm's using the wide spread. The last time I checked mine I was at 78 oz./60 seconds at 3450 rpm's. I'm getting along just fine. It's been that way for 3 years. As Riggle said let the chemical do it's job.
  6. MySide

    MySide LawnSite Member
    Messages: 32

    Thanks to all of you. lines are good. cleaned nozzles and screens even on pickup line in tank. only getting 7' effective spray width. tach started working again. maybe it got wet when cleaning it. guy at permagreen sure isn't any help! will check pulleys and belts, but they seemed tight when i looked at them. Will try it and see what results i get.
  7. gebby

    gebby LawnSite Senior Member
    Messages: 712

    Yesterday I said to check the key on the pully. I should have said the set screw. Small allen wrench needed. I'd get the rmp's up there above 3450, open the valve at the bottom and see how many oz. you get out of that in 60 seconds. There is half a dozen things you can check. The belt could be slipping. Do a search on this sight. At the top there is a search engine. Your question has been brought up many times. I think there also is a diagram of the Magnum on their web sight. As you mentioned your pump may be shot if you haven't used it for a while. Wish you luck.

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