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dav

cleaning aluminum

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dav
i am starting to overhaul the spare model 19 B&S motor for the B-1. it sat in a barn for years and has been in the back yard for the last 4. sometimes covered, sometimes not, depending on the weather and the dogs. the head is looking rather sad due to the powdery corrosion that aluminum gets. what is the best way to clean this up? i can sandblast it, covering the firing chamber and head gasket surface with grease first, to protect them from pitting. but i wonder if there is a chemical method to clean it. maybe soak it in muratic acid or something? and will any suggestions also work to clean the piston? i used to spray pistons with oven cleaner and put them in the oven on the cleaning cycle. this was not a popular move with the Boss and has been banned. (it's been 8 years since i last did that...maybe she's forgotten about it) i have an NOS rod and 2 pistons. the boxes got wet (roof leak) so they also are powdery. if the old rod and piston are reusable, i will save the NOS stuff for another day

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swisstool
I have blasted the aluminum head on the engines, but I just did the one side. I've used muriatic to clean out the gas tanks but they are steel. I don't know how much damage it would do to the aluminum on a piston. Perhaps you could try it on a scrap piece of aluminum like a pop can first. I'd start with a very weak dilution and then progress to stronger dilutions if necessary.

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dav
patrick, the motor was yellow but the head has no paint. i think this may be the original motor for the B-1 and that the black one currently in it is a replacement. not sure when the color of the motors was changed. i am pretty sure the tractor is a 1961. i will skip the muratic acid trick. being lazy, i was hoping for an easy fix.

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