Focustronic bulk replacement parts thread (Mastertronic / Alkatronic / Dosetronic)

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MikeTheNewbie

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Looking forward to this alternative, I'd rather buy a 100 pack of needles at a reasonable price and forget about buying needles again than having to burn $25 for just 6 needles.
The syringes they include in the pack are just fillers in my opinion, I've compared the ones that came with the Mastertronic against cheap ones I got from Amazon and see no difference.
 

Biff0rz

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So we've had to move to a custom mold with the manufacturer. Our price will be around $2/needle - this could go down with more volume but our current order volume is very low. When you combine the low order volume plus a mold it adds up. If we had large commitments to more volume we'd be able to reduce the cost. On the plus side, future orders will be cheaper as they will already have the mold and we will pass that down to all of us.

Our first run will be very limited in quantity because we honestly don't know what our demand will be and this is coming out of our pockets (our own risk).

$2 / needle is still way cheaper than FT's option which is about $4/needle...and I agree, the syringes are just filler in their packs.
 
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richiero

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The DIY silicone septa idea is great but the silicone sheet you are showing is too small, isn't it?.
The DIY silicone septa idea is great but the silicone sheet you are showing is too small, isn't it?.
Yikai 20"x20" 500x500mm 2mm Thicknes Clear Silicone Rubber Sheet Plate Resist Mat High Temp Transparent Heat Resistant Gasket Super Clear Flexible
 

richiero

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Check the details on the Amazon option seems that they missed a 0 in the description and the item is actually 500mmx500mm.
I bought that and will confirm its 500x500 once it arrives
500x500 doesn’t matter that’s just the size of the whole sheet, 2mm think is the most important the thickness
 
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MikeTheNewbie

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Hey @Kermit Frog thanks for sharing! That price for the needles and syringes is definitely more reasonable. I see they sell the septa / membranes too although they look like they wer cut with scissors hehe.
BTW, I got the 2mm silicon sheet and the tool that @robocop1906 suggested and it worked great. Now I have years worth of those things. Thanks everyone for sharing! Don't forget to post here if you find more options.
 

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How often is everyone changing the in line filter? And any cheap alternatives than the $6.00 ones from CoralVue?
There are definitely lots of options for fuel filters on amazon. But I haven’t tried any yet.
 

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There are definitely lots of options for fuel filters on amazon. But I haven’t tried any yet.
I was looking there. Most have some metal in the filter and not even sure how safe the ones with the fabric would be. I have not seen any close to the all plastic design of the Focustronic ones.
 
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MikeTheNewbie

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I was looking there. Most have some metal in the filter and not even sure how safe the ones with the fabric would be. I have not seen any close to the all plastic design of the Focustronic ones.
My Mastertronic and Alkatronic have been running for 2 months now and I haven't changed the filters so far.
I'd be definitely interested in finding a reasonably priced alternative. Please post your findings.
I checked the user's guide and I couldn't find how often they should be changed.
I guess I would change them if I see stuff growing in it or if I notice a large volume change during the pump calibration procedure.

I looked for similar filters some time ago since I perform continuous water changes with DOS pumps. I ordered some fuel filters following a post I found here but they came with a metallic cap and won't work (the picture didn't show the metalic part).
 
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