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Antique Gas Engine Discussion

McCormick-Deering 6hp mixer (early)


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Old 12-22-2014, 11:27:08 PM
Stevie Stevie is offline
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Default McCormick-Deering 6hp mixer (early)

Hello I have an early 6hp M mixer. Has the two needle valves. You can't take this one apart to clean it out. It has a considerable amount of rust inside. What do you all think is the best way to clean up the inside thanks
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Old 12-23-2014, 03:41:50 PM
flatbeltuzr flatbeltuzr is offline
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Default Re: McCormick-Deering 6hp mixer (early)

I would start with electrolysis to start, then go from there.
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Old 12-23-2014, 04:43:12 PM
Tom Fleming Tom Fleming is offline
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Default Re: McCormick-Deering 6hp mixer (early)

There are some people out there that will disagree with me on my next statement, but I have used Muriatic acid to clean cast iron carb bodies to great results. Make sure you have all parts disassembled. Totally immerse the carb body in full strength Muriatic acid in a VERY VERY ventilated area, preferably outside. Let it soak for 4-5 mins, then rinse 3 times and soak again in a baking soda/water mixture. Rinse 3 more times in hot water and dry. If there is still rust present, repeat the process again.

Rust will be gone. Now, be warned, the cast iron will flash rust after this process, as it is now down to bare metal. Also, the carb should be fully degreased prior to this treatment.
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