Fatherof4 Posted March 10, 2021 Report Share Posted March 10, 2021 Hello All. I have a 96 MA. 18.5ft. I recently repowered (last summer) and had the shop replace all the gauges. I went with original Yamaha gauges, and when I did so, they did not replace the fuel sending unit, just the gas gauge. Now, the gauge is off when paired with the old sending unit. Do I need a new sending unit? SHop said they could not be calibrated. I asked the shop to replace the sending unit, they advised there is no access hatch to the tank...find that hard to believe, but, will confirm myself. Any thoughts? Advice? Quote Link to comment Share on other sites More sharing options...
Coto Posted March 10, 2021 Report Share Posted March 10, 2021 Should be a pie hole inside your console on the floor if batteries are on top of it is covering it. Quote Link to comment Share on other sites More sharing options...
SouthernWake Posted March 11, 2021 Report Share Posted March 11, 2021 When you say they are not calibrated, what readings are you getting/what aspect is off? Quote Link to comment Share on other sites More sharing options...
Fatherof4 Posted March 11, 2021 Author Report Share Posted March 11, 2021 with the new gauge, its analog. So when the tank is full, it reads really high about the "full mark" on the gauge. As I burn gas, it lowers into the full or 3/4 tank position. Rather, than when full, reading full or a tad above, it's like wrapped 1/2 way around the dial.... Quote Link to comment Share on other sites More sharing options...
Fatherof4 Posted March 11, 2021 Author Report Share Posted March 11, 2021 Coto - Thanks, I will check there. The question is, if I replace the sending unit myself...How do I know the right sending unit to "pair" with the new gauge? Quote Link to comment Share on other sites More sharing options...
Coto Posted March 11, 2021 Report Share Posted March 11, 2021 There typically the same. I’m sure it has the typical wire arm that the float is attached. They sell them at west marine in adjustable size. There is only two wires red and black to hook up. There is no calibration. Just keep in mind these senders are never that accurate. On my boat full registers sometimes with full bars or one less and that’s after I replaced it with a new one. The old one would stay stuck on full all day. I know my motor makes 3.5 miles per gallon so that’s is how I keep track of how much gas I have left. good luck Quote Link to comment Share on other sites More sharing options...
SouthernWake Posted March 11, 2021 Report Share Posted March 11, 2021 Here is a better idea on how the analog sender/gauge work. Quote Link to comment Share on other sites More sharing options...
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