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what should the fuel pressure be in a
Mercrusier 454 cu in, 330 hp motor?
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Is it a carb'd motor ?If so, I think any where in the 5-8lbs is good.
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Carbed motor, no more than 8 is correct...any higher and your float bowl will start to overflow down the throat. This would be noticeable by inability to get idle smoothed out.
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