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Cox cylinders #1's #4's and one unmarked Cox_ba12




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Cox Engine of The Month
July-2024
robot797's

"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"



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Cox cylinders #1's #4's and one unmarked Empty
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Cox cylinders #1's #4's and one unmarked

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Cox cylinders #1's #4's and one unmarked Empty Cox cylinders #1's #4's and one unmarked

Post  rsv1cox Sat May 07, 2022 8:42 am

It all started with this cylinder-less Prop Rod.

Cox cylinders #1's #4's and one unmarked P1013152

Checked my parts, only cylinder I had was the throttled version and I didn't want to use that.  Went to Matt's and Bernie's sites and they were out of cylinders.  Went to ebay and found five used for $16.  Sold.  

Thinking I had just wasted sixteen dollars I started checking them on the Prop Rods engine.  Sure enough the first one had a burred exhaust port.  Ran some 800 grit on a 3/8" dowel (my standard burr removal tool) through the cylinder, cleaned it up with a paper towel and tried again, ok! Added the glow head finger tight and better than acceptable compression.  Next three cylinders were the same.  Last one was tight at TDC but pulled through with the prop and it turned out to be the best one.  

Two #1's, two #4's, one marked on the exhaust port, and an unmarked thick wall for sixteen dollars.  Not bad.  

No heroic cleanup, just oil and a toothbrush.  One cylinder's exhaust port looks like someone took a jewelers file and filed it.  Same on both sides.

Cox cylinders #1's #4's and one unmarked P1013153
Cox cylinders #1's #4's and one unmarked P1013155
Cox cylinders #1's #4's and one unmarked P1013154


Cox cylinders #1's #4's and one unmarked P1013158
Cox cylinders #1's #4's and one unmarked P1013157
Cox cylinders #1's #4's and one unmarked P1013156
Cox cylinders #1's #4's and one unmarked P1013161
Cox cylinders #1's #4's and one unmarked P1013160
Cox cylinders #1's #4's and one unmarked P1013159
Cox cylinders #1's #4's and one unmarked P1013163
Cox cylinders #1's #4's and one unmarked P1013162

Doesn't matter, Prop Rod gets the blue tanked SB Jr. But, I will put one of those cylinders on it's engine, maybe the one with the altered exhaust port and run it just to see.

Cox cylinders #1's #4's and one unmarked P1013164
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Cox cylinders #1's #4's and one unmarked Empty Re: Cox cylinders #1's #4's and one unmarked

Post  davidll1984 Sat May 07, 2022 8:18 pm

Strange modification on that cylinder I wonder what the performance of this engine is... Are there two bypasses or one Small Cox Logo weird exaust modification Huh...
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