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Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, bear with us; re-confirm and post back with the complete model number of the Helix.
Still, the description of "...starts with starting fluid but after that nothing..." could possibly be a fuel delivery issue (most likely) and/or ignition related (least likely). Based on this but with the above background information missing, proposed preliminary tries (if have not been done):
While the "...remove the fuel pump and just let it be a gravity drip..." would be dependent on: