Author Topic: A different carburetor thread---  (Read 941 times)

Offline Brian Rupnow

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Re: A different carburetor thread---
« Reply #15 on: June 02, 2019, 04:18:30 PM »
That all went well, with very little drama. I got a little bit of silver solder in the threads, but only a very little bit and it cleaned up after running the 10-40 die over it a couple of times. I decided at the last minute to make the cap for the needle valve out of steel instead of brass. I always scrub the brass parts I've soldered with a small wire brush to get rid of that pink color that forms on the brass but I couldn't get it all. Maybe I'll mix up a new batch of citric acid and give it a half hour soak to see if that helps.

Offline Brian Rupnow

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Re: A different carburetor thread---
« Reply #16 on: June 02, 2019, 06:22:24 PM »
Almost there. Remember--these needle have some type of coating on them to keep them from rusting. Soak the needle in laquer thinners for about 5 minutes, then scrub it with some very fine sandpaper. If you don't do this, the solder won't stick to it.

Offline Brian Rupnow

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Re: A different carburetor thread---
« Reply #17 on: June 02, 2019, 06:57:33 PM »
And last but not least---When it is all assembled, file a notch in the cap on the needle valve so you will have some visual reference of how many turns open the needle valve is when the engine works well.