Fixing beats replacing when there is nothing to replace with. The habits, the fix-it trees for the machines that matter, and the crafts that make consumables. Knots live on the one-pager shelf.
Flat tire: lever the bead off, find the hole (pump + listen, or dunk), rough the patch spot, glue thin, wait till tacky, press hard; check the tire wall for the thorn that did it before the tube goes back. Slipping chain: usually stretch โ measure 12 links; over 12โ " (30.9 cm) it's done, swap or shorten. Oil the chain, never the rims. Rubbing brakes: loosen, squeeze the lever hard, retighten while held.
No water: prime it (pour water in the top till it catches). Weak lift: the leather/rubber cup valve is worn โ a cut piece of boot leather, soaked, replaces it. Gritty grinding: sand in the cylinder; lift, rinse, and add a gravel-and-cloth pre-filter at the foot valve.
Won't start, in order: fresh fuel reaching the carb (old gas gums โ drain the bowl)? Air filter clean? Spark โ pull the plug, ground it against the block, pull the cord: no blue snap = clean/gap the plug (~0.7 mm) or swap it. Runs then dies: breather hole in the fuel cap blocked. Surging: carb jet gummed โ carb cleaner through the jet, or soak overnight.
Won't boot: reseat RAM and cables โ most "dead" machines are a walked connector. Overheating: dust from the fans and fins, a drop of oil in a screaming fan's hub under the sticker. Dying disk: the seed vault stick IS the backup โ clone a new box from it (README-FIRST tells a stranger how).
Part of the Ark. Old, universal craft โ original wording, provenance in DATA-SOURCES. A trick this page doesn't know? ๐ ring the bell and teach it.