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Post by Deleted on Mar 13, 2018 20:29:25 GMT -5
As I was sitting there looking at the metering spring that I thought I'd lost for the Walbro HDC carb I'd been working on,a thought occurred to me that the metering spring looked awfully familiar.I might be wrong about this,but it looks a lot like the springs used in the old Zippo lighters & possibly the Bic or Cricket disposable lighters.I don't have any on hand to dissect.The lighters'springs might be just a bit too heavy?
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Post by onlyhomelites on Mar 13, 2018 20:55:33 GMT -5
Walbro still sells replacement springs for quite cheap...there's a downloadable catalog on their website. I just ordered several different part#'s to keep on hand for shop use. I paid about $1 a spring by ordering 10 at a time.
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Post by Deleted on Mar 13, 2018 22:58:37 GMT -5
What about Tillotson? I know Zama includes them in their kits.
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Post by sweepleader on Mar 14, 2018 6:27:00 GMT -5
Lighter springs would be impossibly stiff.
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Post by sawnami on Mar 14, 2018 7:36:23 GMT -5
The amount of spring tension on the lever is important. I don't know that you would be able to substitute the spring easily. Kart racers will keep a selection of various tensions of lever springs to adjust the pop off pressure of the needle when they pressurize the fuel inlet. Usually 10-12 psi for gas carbs.
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Post by Deleted on Mar 14, 2018 7:59:04 GMT -5
At least the wheels in my head are turning.
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Post by sweepleader on Mar 14, 2018 10:04:33 GMT -5
Its always a good idea to consider options.
I was not aware that these springs could be purchased separately.
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Post by Deleted on Mar 14, 2018 10:08:32 GMT -5
Its always a good idea to consider options. I was not aware that these springs could be purchased separately. I didn't know that either Dan,so don't feel bad.I did a search on them almost a yr.ago,& the only thing that came up was buying a bag of about 1000 for something like $50 or $60. |
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Post by onlyhomelites on Mar 14, 2018 21:22:21 GMT -5
Sooner or later, I'll add some of the common ones to my website. The problem is there isn't one consistent spring throughout a carb series; the HDC uses 2 or 3 different ones, depending on the carb. It'll take more time than I have right now to map it all out, but I'll get to it ASAP.
I'm not sure about Tillotson...the catalogs I've come across do not have a separate listing for the springs that corresponds to a model#. So I'll have to dig through individual carburetor IPL's (where available).
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