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    83' 115hp Mercury, prop slip

    What 3 balde would be better at increasing cruising speed fuel efficiency? Or would a 4 blade be more efficient?
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    83' 115hp Mercury, prop slip

    A few thoughts, First is analog tach, and gps speed is my set up. Second, so you're saying that a 4 blade would not be more efficient than a 3 blade? When you say:" Their efficiency and slip reduces hugely anything upwards of slow planing speeds" what are you even saying? Third, let's...
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    Helix 7 g3n with a garmin/lowrance flow meter?

    Anyone know or have used a g3n with the ethernet adapter to a backbone nmea 2000 compatible fuel flow meter? I have a Helix 7 G3N and am looking into ways to get it to show my mpg/gph. Anybody got any ways to use it and not a new display?
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    Helix 7 g3n with a garmin/lowrance flow meter?

    Anyone know or have used a g3n with the ethernet adapter to a backbone nmea 2000 compatible fuel flow meter? I have a Helix 7 G3N and am looking into ways to get it to find my mpg/gph. Anybody got any ways to use it and not a new display?
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    Gph at various rpm...thoughts?

    That is exactly what I'm looking for. Thank you! If other have this sort of data I would greatly appreciate it! Thank you again
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    Gph at various rpm...thoughts?

    Thank you for some actual numbers. It's refreshing to have an answer to a question rather than old rule of thumbs repeated back to me Thanks again.
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    Gph at various rpm...thoughts?

    So on that 84' 115 did you see 11.5 gph wot or closer to 14 gph wot?
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    Gph at various rpm...thoughts?

    If it's a 115hp rated at the prop, then due to loss, the 115hp would go up, meaning a "125hp" crank would lose 10% and land to 115hp prop. So sure not the old 140hp but still thirstier than the "old" 115hp crank rated which is what we normally do the old 10% WOT gph.
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    Gph at various rpm...thoughts?

    2400# loaded weight starcraft 1974 ss with 19p 3 blade stock prop, 65 degrees F, no wind, no current, 2.0 gear ratio, and at each 500 rpm level.... 5500 = 14 gph 5000 = ? 4500 = ? 4000, 3500, 3000...
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    Gph at various rpm...thoughts?

    Looking for actual numbers if anyone has some.
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    Gph at various rpm...thoughts?

    So, the rule of thumb is 10% of hp is WOT gph usage. I have an 83' Mercury 115hp with I'm told is the year they changed to different hp rating (at the prop rather than crank?) making my 115 more like a 140...meaning I "should" see about 14 gph at WOT. With all that said, does anyone have a...
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    Nmea 2000 and gph display

    Wow, the whole time. Guess I really missed the forest from the trees. Thank you!
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    Nmea 2000 and gph display

    Is there a simpler solution that I'm missing outside of nmea 2000?
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    Nmea 2000 and gph display

    So, lets pretend i still want to know my gph. What would a guy need? Backbone=wire? Or Backbone is a device? So flow meter on fuel line. Then flow meter wire to nmea 2000 device. Done?
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    Nmea 2000 and gph display

    So, I am searching for a display (preferably guage size) that would do gph. My set up is no existing NMEA2000 equipment or displays. All I really want is a gph display but it appears to be either expensive (over $500) or nonexistent. I have the flow meter on order (garmin gfs10) and just need...
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    83' 115hp Mercury, prop slip

    Thank you Thank you, That probably was the most helpful. I forget that sometimes, there is no best answer in life, just the one you choose. Trial and error and tracking results. Thank you. I am most interested in your gph calcs. What economizer did you use and is it easy to use. With my first...
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    83' 115hp Mercury, prop slip

    Ok, so Jimmbo, what size boat did you have the 19p merc prop on? Similar to mine? Getting close to 50 sounds better than close to 40. What prop was that exactly, it might be what I'm looking for. I had asked about 4 blades but no one seems keen. Does anyone have a 4 blade at all or are they...
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    83' 115hp Mercury, prop slip

    So, 3 blade hustler Alu at same 19 pitch you think Chris1956?
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    83' 115hp Mercury, prop slip

    I do have power trim. I guess I'm not sure why I am against it, I think in my head it adds slip and extra resistance that I don't need/want. Which may not be the case. I'm looking for economy first and speed second. I was looking at solas props and some have cupping and rake and others not so much.
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    83' 115hp Mercury, prop slip

    So, if you were to try out a 4 blade, with cup and rake, what pitch would you start at? 17? Would you try to stay same diameter as well or not worry so much? Would you share some of your trials with me so I might gleam so info? Thank you for your help
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