RCU Forums - OS 91 Fix

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- - OS 91 Fix (https://www.rcuniverse.com/forum/glow-engines-114/204585-os-91-fix.html)

2thelmt

07-22-2002 10:52 PM

OS 91 Fix

I recently installed a Bison Pitss and the engine finally runs normally. I think its the muffler causing the air bubbles since they are now gone...

TerrellFlyer

07-24-2002 02:58 AM

OS 91 Fix

lots of people have the same problem with this engine, the problem is the o ring in the needle valve,os will sell you two o rings for around 8 bucks or you can ship the engine to them and they will replace the rings free,that is what I ran into last summer. I bought the rings and installed them myself, cured the problem, but felt like I was seduced on paying to repair there mistake!!
John

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