Why almost nobody rebuilds carburettors anymore (and why we still do)
1 September 2026
Walk into most workshops with a carburetted car and watch the reaction. Half will tell you to fit EFI. The other half will have a go with a can of carby cleaner and hope.
Here’s the thing: a carburettor is a precision instrument. When it’s set up properly, an old engine starts easily, idles clean and pulls the way it did from the factory. When it’s not, you get hard starts, flat spots, fouled plugs and fuel bills that make no sense.
What a proper rebuild actually involves
A real rebuild isn’t a spray-and-pray. Ours runs like this:
- Full strip-down. Every jet, needle, float and gasket comes out.
- Ultrasonic clean. The body goes in the tank. It strips forty years of varnish out of passages you can’t reach any other way.
- Inspection and replacement. Worn throttle shafts, tired accelerator pumps, cracked diaphragms. Replaced, not “should be right”.
- Reassembly and bench adjustment. Float heights and settings back to spec.
- Refit, tune and road test. It goes back on the car, gets tuned to the engine in front of us, and gets driven.
Why workshops stopped offering it
Nothing’s been sold new with a carby here for decades, so the trade stopped teaching it. The knowledge is walking out of the industry one retirement at a time. It’s not that modern mechanics are worse. They were just never shown.
We kept the skills, and the distributor know-how that goes with them, because Kelvin Grove and half of Brisbane still has utes, classics and weekenders that deserve to run right.
A full carburettor service at Motor Hospital is $495: strip-down, ultrasonic clean, rebuild, tune, road test. If your old girl coughs, hesitates or drinks too much, book her in.