RYDLYME Marine Biodegradable Descaler (4 Gallon Bottle)

This is a great product. I removed years of residue one the inside of my outboard.

Very effective at remove scale from the internals of the outbound cooling system.

Works awesome on flushing out my outboard engine. I mixed it 50-50 with water and ran it through my engine using a pump and I got rid of all the deposits inside the engine cooling system. It also worked great on cleaning my glass shower door to remove the water spots.

Worth the money. Do it if you love your boat and motor!

I used this on a 90 hp Yamaha 2 stroke and on my twin 200hp Yamahas and it works! Removed lots of deposits and helped resolve my overheating issues. I highly recommend this product to anyone having overheating or as a simple yearly maintenance to clean out the passages on their outboards. Follow instructions on label or view a few YouTube videos to get a better idea of how to use, I diluted mines 1 to 1 and it worked as advertised.