Bob hi - did you manage to get your engine fixed? I ordered the PowerPack an after market unit made by CDI Electronics Part number 113-3101 and fitted
Update - as stated I ordered the PowerPack an after market unit made by CDI Electronics Part number 113-3101. Simplicity itself to fit, comes with fitting
You did not previously state anything about "I carried out a full service of replaceable preventative maintenance parts" in your OP.
Sounds like the sending unit is not reading the whole amount of fuel in the tank......
The float that moves up and down is most likely
Have a 1996 Searay BR 210.
The fuel tank capacity is supposed to be 35 gallons, however, I've never been able to load anywhere near that much fuel.