Post your fuel burn #'s and

[ktugboat42]

updated 12/26/07 new entries are highlighted

[Sailor]

Here's some from today. * = unknown (stroke)

20C, 1985, 150hp, Evinrude, 1985, 2, 15 x 17, 4000, 3.0, 30 mph, 5800 rpm, 1.8 mpg, 38 mph

[makorider]

1990 261 t/200 yams (carbed)

4000 RPM swinging ?X17 stiletto's...29.7 knots @ 20 gph

[Alcedo]

Pete (Sorry !) my pitch is 21.......1992 motor. Ya might want to add a prop manufactor column, as is seems boats behave differently with different brands. Mine is OMC SST

[ktugboat42]

No problem adding the prop manufacturer or anything else you guys would want to compare.

[Prop Blast]

19983 M224, Yamaha F225, 17M SWS Prop, 4,000RPM - 9.5 GPH, 33 MPH

[ob1jeeper]

1983 224, Armstrong 30" bracket, twin Suzi 140 4-strokes - (BOTH are std. rotation), 19 pitch props.

MPG @ 4300rpm (30-33 mph depending on trim & loading) is approx. 2.3 mpg (@ 3700 ft elev.)

Max RPM = 5800 (@ 3700 ft elev.)

[warthog5]

Hmmmmm! I might not be far off with these 18in pitch's I have.

More weight on the boat, more sail area and counter rotator.

But I do have less deadrise.

[makorider]

KT-

Those are the original 1990 yams...

Wart...those 18" wheels are suzi's?? Those suzi markings make absolutely no sense...their pitch always seems to be way off for some reason.

[warthog5]

Yep, Their Suzzy wheel's. I've heard that in the past. The Suzzy wheel's are not consistant with the pitch from other company's.

It doesn't make sence, but that's what they say.

[Mr. P-Reaux]

I just had a thought.... it seems we are looking for some sort of a table-based output of raw data. I might be able to hack a quickie database program next week to keep track of these numbers via a web link.

I'll see what I can conjure up.

-Pat.

[ktugboat42]

Pat, whatever you think is best/easiest but what i'm doing now only takes a few minutes to update and post. Now i just have to get out in my boat and get some #'s.

[ob1jeeper]

ktug...

Seems I forgot to list WOT speeds.

47-49 MPH at full/hvy/moderate loadings, and 42-44 MPH at lighter loadings, Which I suspect is a result of some minor cavitation issues I've yet to get corrected at the lighter loadings.

Also, the MPG figure I gave is a tad off. After recounting our trip last night while unloading all the gear, it seems I forgot to include the miles from one full day of running, so after refiguring that day, it's really closer to something like 2.9 -to- 3 MPG, albeit that also includes a BUNCH (something like close to 6 hours) of idle/trolling speed time.

OB1

PS: I'm running OEM Suzy alum 3-blade (19 PITCH x 14.25" Dia.) props. I originally tried to get by with Suzy's 3-blade alum 21's, which worked fine @ sea level and up to 1700 ft elev., (trying the 21's was all before I added the armstrong bracket, and enclosed the transom), but the motors weren't strong enough to pull the 21's @ 3700 ft elev., so I was forced to the 19's.) Am giving some consideration to trying some SS 19's, but haven't got enough of the rest of the minor things sorted out yet, so that will have to wait.

[johnhermes]

1990 Mako 260 Walk around

2002 Yamaha 200 HP HPDI's

4000RPMS, 32 mph, 16 GPH

17" wheels

[warthog5]

quote:

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17" wheels

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3X?X17[?]