00:00Torn between rebuilding yard tools or buying new?
00:03We test 21 V saw motors against trimmer gearboxes to see which lasts longer.
00:08Found best replacement deals online to save cash.
00:12First up, universal trimmer gearhead for $19.77.
00:17Fits 26 or 28mm shafts with 7 or 9 tooth options.
00:23High 4.8 rating over 4000 sales proves metal gears take heavy brush punishment without stripping.
00:28Next, 9 tooth dedicated trimmer gearbox at $14.50.
00:34Best budget option for standard weed eaters.
00:37Thick cast housing dissipates heat fast under continuous load, making it durable steel for
00:43routine yard work.
00:44Third, heavy-duty square rod gearbox assembly priced at $28.59.
00:50Premium build with square drive plate handles aggressive brush cutter blades better than
00:54round splines.
00:55Worth extra cash if cutting thick saplings daily.
01:00Fourth, pure copper 21-volt 550 motor for $18.06.
01:0514-tooth gear fits 4-8-inch mini chainsaws.
01:09High-purity copper windings resist thermal burnout, giving long runtime under tough wood-cutting
01:14strain.
01:15Fifth, alternative 21-volt saw motor at $15.49.
01:21Delivers identical 14-tooth drive performance at lowest replacement price.
01:26Perfect cheap drop-in fix to bring dead cordless mini saw back to life instantly.
01:31Links to all parts in description below.
01:34Drop like, hit subscribe for more raw tool teardowns.
01:37Hold like, stop for much real apa-havenity.
01:374, time you come back over to life today.
01:37Please don't forget call me Dr.
