Quote:
Originally Posted by Biodiesel300TD
I believe all the fuel lines but the return lines on most diesel MB's is 5/16"
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On my 84 300D I replaced the Hard Plastic lines between the Spin-on Filter and the Lift Pump and also the Return Line from the Fuel Injection Pump to the Fuel Return Junction Block on top of the Filter with 1/4 inch ID Fuel Hose.
But, I do not know if the newer models followed suite.
The Cigar Hose and the Fuel Inlet hose can be replaced with 5/16 ID Hose on mine.