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Old 06-23-2012, 07:41 AM
  #21    
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Originally Posted by LMychajluk View Post
Hmmm.... I would think that the Garmin would just be showing the level from the sender, so the Yamaha MFD and the Garmin should show the same (if they're both working right). I don't want to derail this thread, but there are one or two other threads about the fuel management w/ the new LCD display. Be sure you let Yamaha know that it's not working correctly (I put it in the survey they sent for the new motors - gave the gauge a '0', and I'll call them again if they can't get mine working right after my 20hr service). I'm also going to play around and see what I can see as far as fuel on my Simrad NSE this weekend.
No problem not derailing

The Garmin does reflect the same fuel level as the MFD which is coming from the sending unit. These match up...

The issue is that the Garmin has a function where you can set "total fuel on boat" and then as you use fuel and fill up again you can select "add fuel to boat." This is supposed to allow you to track of fuel on board through the Garmin. It's a numerical value displaying fuel on board. Ie: 50 gallons. This is the feature that's not accurate. I was really excited about this feature on Garmin but it doesn't match up to the sending unit that gives info to the MFD fuel bars as well as the Garmins fuel guage. Kind of hard to explain but bottom line is I can't trust the numerical reading of fuel left like 50 gallons. No a huge deal b/c I can tell within 5-10 gallons with the MFD and the Garmins fuel guages as well.
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Old 06-23-2012, 08:29 AM
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Originally Posted by NOLIMIT40 View Post
The Garmin is receiving it's info on fuel burned from the Yamaha C/L fuel flow gauge. Read your C/L gauge manual and you will see you can program a correction factor into your C/L gauge, which will correct the info you are getting from the Garmin.
Now that's good info...I'll check it out. Thanks!!
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Old 06-23-2012, 08:45 AM
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Originally Posted by NOLIMIT40 View Post
The Garmin is receiving it's info on fuel burned from the Yamaha C/L fuel flow gauge. Read your C/L gauge manual and you will see you can program a correction factor into your C/L gauge, which will correct the info you are getting from the Garmin.
Won't that also 'correct' the amount of fuel burned shown on the Yammy LCD? What I mean is, assuming the Yammy LCD is correctly showing the fuel burn/consumption, and the Garmin is showing something different, would changing this value make the Yammy LCD inaccurate?
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Old 06-24-2012, 01:58 AM
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Returning to the original issues of RPMs and props ....... I would like to let you know something I once did: with a severely underpowered seacraft23 with a Honda BF 130 I sharpened the aluminum propellerīs leading edge almost to a knife edge, by hand using a file and sand paper after that I balanced the propeller using two plastic cones to ensure centering of a shaft that I run over two parallel cutter blades and It might be dangerous or illegal to use such a sharp propeller, but the truth is that I reduced drag to the prop by this sharpening and was able to increase the operating revolutions of the motor, the combined effect of less drag + more power made the engine run at the righ rpms and this matching of the propeller to the max rpms of the engine propiciated an increase the speed of around 3-4 mph, the modified propeller was in use for more that a decade, kept sharp and fit ........ despite the sharp as knife leading edge and primitive balancing method.
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