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O.S. 1.08 FSR carburetor overhaul

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Old 05-29-2017, 09:02 AM
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ejmorgan
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Default O.S. 1.08 FSR carburetor overhaul

I need to replace the 3 small "O" rings on the carburetor mixture control valve for the 7D carburetor on this engine. What kind of oil or grease can I use to aid re-inserting the mixture control valve back into the carburetor rotor, that will not damage the "O" rings? Is Marvel Mystery Oil compatible with silicone rubber "O" rings? Thank you for any tips you can offer!

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Old 05-30-2017, 08:43 AM
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Don't use any grease. Just wet them with glow fuel and you'll be OK. Do not use a petroleum product, which will damage the o-rings.
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Old 05-31-2017, 09:11 PM
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Default Thanks Bax!

I appreciate you taking the time to assist an old OS fan since the "pet" engines of the 1970's. :-)

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