I use a JABSO manual head.

I used to rebuild the manual head every couple of years, but when the rebuild
kits got to $90 and you can one find of these "BIC lighter" units for just over
$100 when you wait for a sale, it doesn't take any more time to replace the
whole works with a brand new unit and it makes a lot more sense.

Still, you need a rebuild kit in the spares.
Might not be a Worst Marine available when the cheapie head decides to take a
dump of its own.