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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › Rebuilding YS 50, question......
02-28-2010 09:28 PM  10 years ago
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WrenFlyer

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Mississippi

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Rebuilding YS 50, question......
I'm rebuilding my brothers YS 50, just installed the sleeve and piston. Should the piston ring be barely grabbing the ports in the sleeve when you turn it over by hand?
Mr. Haney
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02-28-2010 09:34 PM  10 years ago
z11355

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New England

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isn't there a locating pin in the piston groove?

sounds like you're gonna catch the edge of the ring on a port and destroy the engine
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02-28-2010 10:28 PM  10 years ago
WrenFlyer

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Mississippi

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Ring is properly installed, double checked the pin location. Seems like it just barely grabs the port.Mr. Haney
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02-28-2010 10:29 PM  10 years ago
z11355

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New England

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are you sure the piston/conrod isn't turned 180 ?
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02-28-2010 10:31 PM  10 years ago
Dr.Don

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Make sure there is no burr on the inside edge of the ports. Sometimes inappropriate disassembly tools or techniques can raise a burr where none was before. Dr.Don
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02-28-2010 10:32 PM  10 years ago
Dr.Don

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+1 what z11 said above.Dr.Don
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02-28-2010 10:39 PM  10 years ago
WrenFlyer

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Mississippi

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Brand new liner, checking now to see if installed the piston/rod backwards.Mr. Haney
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02-28-2010 10:44 PM  10 years ago
WrenFlyer

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Mississippi

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Thanks guys, had the piston/rod installed backwards!

Correct now!
Mr. Haney
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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › Rebuilding YS 50, question......
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