OTC 7666 Decarbonizing Attachment Review

Adapter Works Good to Poor OTC have stopped producing the decarburizer to use with this and have found a few other brands that seem to work just as well

Because OTC no longer supplies the induction calciner. Check RUN-RITE.COM for an alternative source of supply for this type of product.

Adapters performing excellent to poor OTC is ceasing production of decarburizer for use with, found a few other brands that seem to work just as well

I bought this 7666 decarburizer adapter to use with my OTC fuel injection system (7448 canister) and 6550 PRO (fantastic setup). Unfortunately I can't find 7904A D carbonating fluid anywhere. All parts manufacturers say it's obsolete. After calling OTC, OTC confirmed that the cleaning fluid was indeed discontinued and could not offer me any alternative products to use. So, ultimately, this adapter is intended to be used with a product that is currently out of stock.

This adapter works great with OTC injector cleaners. I bought an OTC tool and needed a fitting to connect it to the car's intake manifold and fuel line. The OTC 7666 actual decarburization adapter is better constructed than the version shown in the picture with a brass hose nipple end and the bends on the clear hose are a smooth ferrule all the way around. 5/16 inch was the smallest. The intake manifold fitting I needed to connect to was about 3/16", so I made an adapter hose by heating a piece