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#1
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shindaiwa brushcutter observation
having sold and serviced these sorts of machines etc.,. for a good
many years, it's not until you use them in certain situations that some of their design weeknesses show up. my last brushcutter was a jonsered, now i'm not talking power units i'm talking about the gear box end of the business. i know own a shindaiwa. the shindaiwa has a very annoying design fault with it's gear box strandy type grasses wind up around very rapidly and very often no matter what aproach i used, this event happens less rapidly with steel blades fixed than it does when the nylon trimmer head attached that is deadly for winding up grass around the head so tight and virtually bringing the machine to a stop so you have to then stop and clear the mess. now even with a 12" 3 pointed star type steel head that i was using to trim around young trees i needed to clear the mess between each tree and in some cases twice for each tree, that realy messes up getting the job done quickly. i have used the jonsered in these conditions and yes it will twist up at times but nowhere near as often as the shindaiwa, and never with a steel blade on that i can recall. so my opinion is if you are looking to cut longer thicker type strandy/stringy grasses look to the design of the gear box. if i can explain it to some degree the jonsered box has the flange that goes between attachments and the box as a moulded part of the box, on the shindaiwa this part is part of the rotating mechanism, and it is around this and up around the box that the grass all twists up. this may help others in future purchases, used in normal domestic purposes where things are continually trimmed the shidaiwa will perform along with all the others, but in rural or heavier type work it has short comings. enjoy the summer len -- happy gardening 'it works for me it could work for you,' "in the end ya' gotta do what ya' gotta do" but consider others and the environment http://members.optusnet.com.au/~gardenlen1/ my e/mail addies have spam filters you should know what to delete before you send. |
#2
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"len gardener" wrote in message ... having sold and serviced these sorts of machines etc.,. for a good many years, it's not until you use them in certain situations that some of their design weeknesses show up. SNIP Funny you mention this. The local council has changed from stihl to shindaiwa, and a mate of mine did mention a similar problem that you mentioned, but with the line heads. I've found the stihl brushcutters to be quite good, and only 2 weeks ago we couldn't figure out why the heads were clogging up when pruning the foxtails at work with a 3 pointed star head, when the day before they were fine. It was the dew on them. Other than that the stihls did not fail in the foxtails. Then again they do have a small disc that you put on to stop the grass getting between the top of the cutting head and the flange of the rotating shaft. I have a stihl brushcutter, overkill but cheap to buy. Only gripe I have with stihl is most of it's equipment seems to bog down once started cold. By that I mean you start it when cold, try feed a little gas on, and it's like it bogs down/floods, and dies. Brushcutters, chainsaw and hedge trimmers all do it at work. But maybe it is due to the fact we are running them at 25:1 when it's suggested 50:1 with the stihl oil. But then it does leave a little room for error for some of the misfits at work :-) Cheers Andrew |
#3
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g'day andrew,
they are all designed different down the gear box end, like i say the jonsered system looks ans works very well. also i couldn't ever use the tap-n-go head as the big plastic shroud on the shindaiwa gets in the raod and it has a permament place for when the tap-n-go is used, silly thing realy. i had to move the shroud about 12"s further up the shaft so it wouldn't foul in the longer grass i get to trim, i still use my old manual head from the jonsered. yeh shidaiwa recomment 50:1 mix i ran it in on 25:1 and currently run it on a mix 1/2 way between app' 37:1, but i like your idea of 25:1 regardless. the shind' uses noticably more fuel than the jonsered so my thinking is that they ahven't realy put any research into developing an engine that requires less oil they have just jetted up the carby to run a richer mix in the crankcase. so the 50:1 makes them look more earth friendly, the way i see it 2 strokes are on the way out so why would any manufacturer be it of engines or oil waste research dollars on improving the polluting factor of 2 strokes (silly realy when you look at all those jets and diesel trucks one would wonder how much dirty air the few 2 strokes in the world would create chuckle). len snipped -- happy gardening 'it works for me it could work for you,' "in the end ya' gotta do what ya' gotta do" but consider others and the environment http://members.optusnet.com.au/~gardenlen1/ my e/mail addies have spam filters you should know what to delete before you send. |
#4
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"len gardener" wrote in message ... g'day andrew, SOME PARTS SNIPPED yeh shidaiwa recomment 50:1 mix i ran it in on 25:1 and currently run it on a mix 1/2 way between app' 37:1, but i like your idea of 25:1 regardless. the shind' uses noticably more fuel than the jonsered so my thinking is that they ahven't realy put any research into developing an engine that requires less oil they have just jetted up the carby to run a richer mix in the crankcase. Basically we go with 25:1 just in case someone puts straight fuel in by accident. Hopefully if there is some mixed 25:1 in the tank, then that added straight fuel may not do any, or as much damage as if it were 50:1 in the tank. so the 50:1 makes them look more earth friendly, the way i see it 2 strokes are on the way out so why would any manufacturer be it of engines or oil waste research dollars on improving the polluting factor of 2 strokes (silly realy when you look at all those jets and diesel trucks one would wonder how much dirty air the few 2 strokes in the world would create chuckle). The thing I don't get is I heard some of the new four strokes still run 2 stroke mix (some whippers?). Ok, I've heard of some dirt bikes having the same setup, where a feeder sends out oil stored in a separate tank to the fuel. Ok, it may get rid of the sound of a 2 stroke, but just as much air pollution IMO. len snipped -- happy gardening 'it works for me it could work for you,' "in the end ya' gotta do what ya' gotta do" but consider others and the environment http://members.optusnet.com.au/~gardenlen1/ my e/mail addies have spam filters you should know what to delete before you send. |
#5
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g'day andrew,
just a bit more on the more oil mix, my neighbour is a tree lopper uses sthil saws, he tunes them a little on the rich side and runs more than the 25:1 recommendation her runs about 20:1 this gives him longer engine life. i reckon it doesn't matter if they puff a bit of bluey coloured smoke while idling (idling not the best part of a 2 strokes life) so long as the smoke all but dissapears when using working revs which for b/cutters is about max. yes i have heard of the 4 strokes with oil in the mix or oil blender, sthil have one in their brushcutter very expensive, and yes to me it just doesn't make sense as it is the oil mixing in the fuel that is the polluting aspect, so can't see any benefit in the technology at all. be like adding 2 stroke oil to our cars hey? len snipped -- happy gardening 'it works for me it could work for you,' "in the end ya' gotta do what ya' gotta do" but consider others and the environment http://members.optusnet.com.au/~gardenlen1/ my e/mail addies have spam filters you should know what to delete before you send. |
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