Yamaha digital fuel management gauge

[mmaequipment]

Just purchased a new replacement 6Y5-W0088-54-00 Fuel mangment gauge. Being this was a direct replacement of the same gauge that went bad, all the wiring was the same. However it appears that it's not calculating for dual engines. It showed I only used 7 gallons and traveled 24 miles I do have it set for P/S. I have twin 2007 200HP Four strokes and never got that kind GPH. It?s like its only calculating one engine. Is there any settings that's need to be done? Any other ideas

Thanks for any help.

[boats.net]

If didn't replace fuel flow senders then one may be bad or wiring problem. Check that both tach wire are connected to FM gauge.