Yamaha fuel managemenat guages

[matt5514]

My 28 Parker has 4s 225s. The fuel consumption on the guage reads significantly less than the actual use. For example, the guage was reading 130 gallons used and I poured in 160 gallons at the pump. I have this problem consitantly. The boat and engines have only about 300 hours. Has anyone had a similar issue?
Thanks,
Matt

 

[chrisn]

I believe the Fuel Management system has a 25 gallon buffer or reserve. This is why it shows 25-30 gallons off of level. Should be noted in your Yamaha handbook.

 

[gerg]

You can adjust the flow rate readout in increments via the dip switches on the back of the guage. It's a trial and error type of adjustment.

I don't think it's a reserve issue. It just needs a calibration tweak.

 

[matt5514]

Thanks. I'll explore both suggestions.