Hello Bob,
Yes, most of the highly effective chemicals have been taken off the market. After they realised how hazardous they were - unfortunately.
I did a search on the internet and found a ultrasonic cleaner manufacturer who made some recommendations about what chemicals were safe to use within an ultrasonic cleaner to clean carburettors. They start off with this warning. On that Hanno might be able to confirm...
'Using the wrong cleaning solution can damage your carburetor'.
Best Cleaning Solutions for Your Ultrasonic Cleaner
When choosing a cleaning solution for your ultrasonic cleaner, it’s important to select one that is safe for use on carburetors and will effectively remove dirt and grime. Some popular options include:
Simple Green: This environmentally friendly cleaning solution is a great choice for carburetors. It’s non-toxic and biodegradable, making it safe for use on sensitive components.
Berryman Chem-Dip Carburetor Cleaner: This specialized carburetor cleaning solution is designed to remove tough deposits and contaminants from carburetors. It’s safe for use in ultrasonic cleaners and will leave your carburetor looking like new.
Purple Power Carburetor Cleaner: This powerful cleaning solution is ideal for removing heavy deposits from carburetors. It’s safe for use in ultrasonic cleaners and will leave your carburetor clean and free of debris.
Accessed 29th January 2024 from
https://www.bjultrasonic.com/what-to...asonic-cleaner
Only the Simple Green is available in Australia. From the big green hardware store that puts all the old local independent hardware stores out of business. You know that one!
Kind regards
Lionel