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OS46LA 25FP and 25LA - carb o ring sizes


MikeQ
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You need to measure the inside diameter of the "0" ring or the diameter of the carb spigot. 5he ring will usually be a bit smaller in diameter than the spigot. Search O rings on ebay. There are loads of suppliers then put the size required in . JMO but Viton O rings last longer and stay flexible longer than the normal nitrile rings.

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Sorry i was distracted and forgot to add that you will also need to measure the thickness/section of the O ring material . I believe these are approx 1mm section  for these engines . Any thicker and you wont be able to get the carb retaining screws in.

Hope it helps.

Edited by Engine Doctor
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