Quote:
Originally Posted by Tartan30guy
So let's talk about exhaust blockage. Right now, the A4 exhaust is exactly what I'd expect; good water flow and exhaust gasses coming out. When I increase RPM, the water flow and exhaust gasses increase as well. With this in mind, I'm not thinking the exhaust is an issue. Am I missing something? Thank you
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It is possible to have a partially blocked exhaust that allows some water and gas out but not enough to permit the engine to exhale properly and deliver proper power. This can happen from sediment/scale in the manifold or from a collapsed ply in the rubber exhaust hose, even though the outside of the hose looks fine.
You detect this by disconnecting the hose and running the engine briefly to see if the power response improves.
I agree, the carb is more likely the source of the problem but isn’t necessarily the only cause of the symptoms you’re describing.