vic008 17 Posted December 27, 2019 Share Posted December 27, 2019 Got it poured into the exhaust elbow to clear the blockage. After it has eaten the carbon does it start on the casting? Check tomorrow? Quote Link to post Share on other sites
Steve Pope 243 Posted December 27, 2019 Share Posted December 27, 2019 Phosphoric acid, 1 part to 4 or 5 parts water is a better choice Quote Link to post Share on other sites
Island Time 1,239 Posted December 27, 2019 Share Posted December 27, 2019 Wont do anything to cast iron. Dont use on aluminum! Quote Link to post Share on other sites
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