flushing cooling system on yanmar 4jh-2te

[zowie]

was told to use oven cleaner. anyone heard of this?

 

[Honeyman]

UUUMMMM No...haven't heard that one.A bottle of Prestone Super Flush did a nice job on my 3GM30F just a week or two ago. Why not stick with something designed for the purpose?

 

[CharlieCobra]

Ouch! Something as corrosive as oven cleaner in an engine block is not a good idea.... Not to mention the toxicity.

 

[Maine Sail]

Rydlyme (LINK) is what I prefer to use. Works really, really well and is specifically engineered for the marine environment.