2stroketony
Contributor
Spoke with a Huish Rep the other day and he said the Omega III is not being produced anymore yet will be suported. The Hollis 500 remains in production.
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I tried a new exhaust valve and looked closely at sealing surfaces, still wet. Which leads me to think your suggestion of cracking effort set too low is a possibility, I do have tendency to tune close to the edge.Raise your cracking effort just a touch.
Maybe ask your LDS to order you a new exhaust mushroom valve. Maybe a tiny irregularity in the skirt.
What is the story with Hollis?