Did you route the hose from the vent upwards towards the gunwale before turning downwards to the fuel tank? It's like installing an inverted p-trap. Also, have the vent angled at 45 degrees toward the stern.
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-Steve
"Oar Chasm!"
1977 Wellcraft V20 Step OB cuddy. 1971 1350 Merc
"Any damn fool can navigate the world sober. It takes a really good sailor to do it drunk."
- Sir Francis Chichester
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