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There should be 2 hose running to the petcock under the tank...... Wait, the Metro has a fuel pump. Under normal circumstances you just disconnect the vacuum line that opens the petcock and pull suction (I use a Shop Vac) and the petcock will open, allowing you to drain the fuel. I've worked on Metro's several times but have yet to ever have to drain the tank. You might be able to just disconnect the fuel line and open the gas cap?
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