My secondary pump on my 12-1800 locked up Friday night after 4000 miles of intermittent use. The primary pump that runs all the time is still good. Has anyone found a Walbro pump that will fit in the 12-1800 housing? A guy on another forum said he used a Aeromotive 340, but I’m looking to see if someone has found a better replacement pump. For me it has to be E85 and hot fuel compatible.