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replacement plastic hose clamps
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| donald_harby |
Posted on 04/23/11 - 3:55 PM
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I am getting ready to replace some fuel lines and was wondering about the plastic clamps used everywhere under the cowl on all the carbed engines I have owned. I searched and many say you have to have them and not hose clamps or the crimp on clamps. Why is this? I don't see any reason? Any ideas on this I made external fuel lines using the crimp on stainless clamps and they work great. Seems they should work fine under the cowling too.
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| JohnnyCW |
Posted on 04/23/11 - 6:50 PM
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All of my old carb 2-strokes used the stainless pinch clamps under the cowl and they're what I've always used when I've had to replace lines or do other work requiring removal of the originals. Some folks don't like the metal pinch clamps because they say they cut the lines. I've never had any such problem but then again I make the effort to use the correct size clamps and install them properly. Use too small a clamp and yes, it'll eventually cause the line to fail.
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| donald_harby |
Posted on 04/24/11 - 6:18 AM
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I like the metal pitch or crimp on clamps a lot. I think that is the way i will go but I think some of the spaces are tight. Does anyone have a good source for the small stainless clamps?
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| JohnnyCW |
Posted on 04/24/11 - 7:39 AM
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I get all mine from McMaster-Carr. They have a great selection so you can purchase the appropriate sized clamp for almost any given sized tubing/hose.
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| Tom W Clark |
Posted on 04/24/11 - 9:04 AM
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Do NOT use conventional stainless steel hose clamps. Do NOT use Zip-Ties. Those are real no-no's and lead to leaks because there is a small area between the end of the band and the screw where the clamps exerts little or no pressure on the hose. Zip-ties suffer the same problem even though you can generate tremendous clamping pressure with them
Crimp-on clamps were used in the old days and mostly work. You need a special tool to install them but some manufacturers will not even use those any more.
The plastic ratchet clamps (a.k.a. Snap Grips), while kind of unsightly, but do NOT leak because they apply pressure uniformly around the hose and they are easily installed using pliers and easily released and resued if you need to.
They are also easy to find; my local hardware store stocks them, though they are expensive. McMaster-Carr has the plastic ratchet clamps (snap-grips) in any size you need and they are MUCH less expensive if you need to buy more than just one or two.
They come in two styles, Single Snap-Grip and Double Snap-Grip (which are far more common). For outboards, you want to use the Double Snap-Grips.
http://www.mcmaster.com/#snap-grip-ho...ube-clamps
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| Mr T |
Posted on 04/24/11 - 10:40 AM
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All my evinrude and johnson motors have used the snap grip style of clamps and I find them easily at any local dealer. I like them better than anything else I have seen.
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| Tom W Clark |
Posted on 04/24/11 - 11:03 AM
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Here is an excellent You Tube video that demonstrates why you do NOT want to use conventional hose clamps or zip-ties.
http://www.youtube.com/watch?v=SEbW-6...re=related
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| JohnnyCW |
Posted on 04/24/11 - 11:40 AM
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I keep a variety of different zip-ties on board as they come in handy for emergency repairs but I don't know why anyone would use them for normal installation. I've never seen anything industry related that suggested doing so is recommended.
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