This is a beautiful thing.

ken35216 · Posted: Mon Jan 22, 2018 2:23 pm Post subject: This is a beautiful thing.

The 200 Yamaha pairs very nicely with the 25 C-Dory Cruiser. 21 mph (I usually have it on kts but switched over for the pic) at 7 gph is 3 mph. That is a very beautiful thing! This pic was heading west.

ken35216 · Posted: Mon Jan 22, 2018 2:27 pm Post subject:

I just did a little cruise from Destin, FL to Pensacola and back this past weekend. The below numbers (which are accurate including fuel) are from the trip back.

I was heading east with winds 8-15 from the SE and waves 6-8 inches from the SE. 1/4 water on board and 81 gallons of fuel at the start of the trip back. Me and a 70 pound dog and I don't travel light.

That's an average of 2.910 mpg for the trip (I used a calculator lol).

The max speed was from a different trip. It saves the max.

Aurelia · Posted: Mon Jan 22, 2018 3:37 pm Post subject:

Just goes to show that a larger/new engine can drink less than an older smaller one. We had to luck out to crack 2mpg with our old twin 90s.

Greg

ken35216 · Posted: Mon Jan 22, 2018 3:55 pm Post subject:

gulfcoast john · Posted: Mon Jan 22, 2018 4:18 pm Post subject: Yamaha MFD interface

Ken,
very nice.

You came to Pensacola and didn't bring the 2 Fat Tire beers for me?

What's the source for the fuel flow input? Garmin GFS-10 sensor in the fuel line? Did you illegally snake the rigging tube with a Lowrence adapter to the ECM plug under the cowling like I described in 'Extracting engine information...' post? (If so, you're missing an additonal 3 pages of engine parameters including MPG without using a calculator). Yamaha Gateway to your Garmin N2K backbone? Yamaha Command Link gauge? Something else?
If you can find the right page the Garmin 741 allows you to select MPG, fuel flow and trip and total used even if it's just from a GFS10 fuel line sensor. It's under 'information' not 'engine gauges' as I recall.

That charted 'Do Not Anchor' area in the ICW near Spectre Island is due to a leaky Russian emitter on the Eglin AFB portion of Okaloosa Island for the fighter jets to practice with. When it's turned on, you don't want to be there long.

Cheers!
John

ken35216 · Posted: Mon Jan 22, 2018 4:33 pm Post subject: Re: Yamaha MFD interface

rogerbum · Posted: Mon Jan 22, 2018 5:36 pm Post subject: Re: Yamaha MFD interface

gulfcoast john · Posted: Mon Jan 22, 2018 5:38 pm Post subject:

Sorry...
Your 741 display can only display information that is inputted from some sort of sensor somewhere...the only exeception being your GPS position, which comes from an internal GPS antenna in the 741.

The depth must be coming from a transducer, probably on or near the transom, that is plugged directly into the 741, or, if you have one, plugged into a network 'backbone' of connectors (N2K network) and the 741 is plugged into that. A starter Garmin network backbone runs about $70 and many owners have installed them. If you had installed one, you would remember doing so. If I had followed the directions precisely, it would have taken half the time.

The fuel flow info must be coming from a transducer/sensor, probably on or near the fuel line to the engine (like the Garmin GFS10 sensors, $150 each), or from the engine itself via a plug under the cowling (for 2006 and later engines). There are multiple iterations available in YamaWorld, but ultimately there are only those 2 sources of data for engine fuel flow. Fuel line sensors are not accurate at idle because dollops of fuel are irregularly pulled into a tank on the engine and run the engine until that VST empties.

I'm curious whether any other Yamaha owners have tried the hack I described in my 'Extracting Engine Data..." post and wondered if you had done it, but obviously not, because it is a bleeding-knuckles 3 beers per engine adventure that you would remember. However, for the price of 2 $90 Lowrance cables (and some large Band-Aids), you can extract more info directly to the multfunction plotter display you already own without paying $1,100 each for the 'proper' Yamaha gauges. Just say'ing.

I'll figure it out when we see your boat and gauges.

Roger,
I would tend to agree, except that a bunch of other engine parameters (3 pages) would be available and showing unless Ken de-selected them all, including eng volts, temp, rpm, trim, oil press, etc etc.

The story of how how the US came into possession of that then-state of the art Russian radar is hilarious, but for another time.

Stay safe!
John

localboy · Posted: Mon Jan 22, 2018 6:48 pm Post subject:

thataway · Posted: Mon Jan 22, 2018 8:54 pm Post subject:

There is a "rule of thumb" that gas engines put out about 14 hp per gallon of fuel an hour. If burning 7 gallons an hour, that means that you would be using about 120 hp. Certainly the Yamaha is loafing at 3900 RPM. Great numbers!

Next time add another 25 miles to the trip, and come up to the top of Perdido Bay! Free dock and amenities at Camp Thataway.

ken35216 · Posted: Mon Jan 22, 2018 9:34 pm Post subject:

thataway · Posted: Mon Jan 22, 2018 10:19 pm Post subject:

ken35216 · Posted: Mon Jan 29, 2018 1:03 pm Post subject:

Thanks Dr Bob and I can't wait to see what the numbers are that RPM.

I'm a member of a facebook page called "Trailer Trawlers" and I asked for other people's numbers:

"Ours is a 2016 RANGER TUG 25 SC with Volvo Penta D3 150 hp, top speed is about 18 mph, at 9 mph it is getting about 2 mpg"

"Ours is a 2018 Ranger Tug R29S w/Volvo Penta D4 300 HP. Although top speed is 22 MPH we typically travel at 8 tp 9 MPH and get roughly 2.5 mpg."

"2005 Rosborough w/ Honda 225. Fast cruise 20 mph at 4200. 2.5ish MPG"

I'm liking the C-Dory more and more (for my needs).

starcrafttom · Posted: Mon Jan 29, 2018 1:44 pm Post subject:

I have been saying it for years. I would rather run a big motor at half throttle then a small engine at full throttle.

hardee · Posted: Mon Jan 29, 2018 10:18 pm Post subject: