Performance

[EVERGREEN]

Trader,
I would like to compliment you on this site; I have found it to be very informative, and to make a suggestion.

I would like to suggest that you post an updated performance chart for Seacrafts of different size and motor configuration. With all of the new motor technology out, and the ever-increasing cost fuel it seams to be a constant topic on this board. I think that many board members are investing in new engines and could contribute data from their experiences.

It would be valuable to have an unbiased review of different motor set-ups, brands, and attachments i.e. brackets, twins, inboard, etc. And most importantly how the new technologies perform Vs the old 2-stroke motors on a Seacraft hull.

I would be glad to supply an Excel spread sheet to help manage the data, or help in any way if needed.

[Trayder]

Tx egreen-

I will do this and put it under the reference section. Now I need people to post their boat engine combo's with #'s

if you want to start the post compile the data in excel I will be happy to put it online and give you the credit

[Briguy]

Sounds like a good idea to me. Members should also note if their motors are on a bracket and what props they are running and weather they are ss or aluminum.

[RS]

You want to start a new thread for this and make it a sticky?

[Trayder]

Roger-

yup

[peterb]

I have twin 1998 SWS 150 Yamaha's on my 23 foot SF. My transom was rebult by the previous owner when he put the current outboards on eight years ago. It is the traditional transom setup (lots of wasted space). 900 pounds is a lot of weight to have in the back of my boat. I need to keep the drain plugs in the back of the deck when I am in the boat.

I probably have around 750 hours on the engines. They top on in the mid 40's at around 5,400 RPM's. When i cruise at 4,000 RPM's I am going around 32 to 33 MPH, and get a whaling 1.5 miles per gallon.

I have a 78' 23 CC with a pair of mid 80's crossflow omc 150's with 21 pitch props it tops out at 50mph at 5200 rpm and cruises at mid 30's and gets a wopping 1.25 mpg. I am currently rebuilding a omc 225 to replace the 150's and also will be running a 25hp omc for a kicker. Hopefully this will increase my fuel economy without losing to much performance.

[Ikan Besar]

1971 SeaCraft 20' CC
75 gallon tank (full)
T-top
Suzuki 140 4-stroke with 14x20 Stainless prop:

40mph at 6000rpm
fuel burn at 30mph - 5 miles to the gallon [img]/images/graemlins/grin.gif[/img]

[Bigshrimpin]

1976 SeaCraft 20' MA (Big Console)
70 gallon tank (3/4)
1 Person
1981 Mercury v225 w/wh-22 carbs
8hp Yamaha four stroke kicker
2 BIG - 6 volt golf cart gel batteries
Aluminum Prop (stock Yamaha 19pitch)
35mph at 4000rpm
Fuel Burn @ cruise (4000rpm - 35mph ) is 11 GPH = 3+ mpg
Top Speed is 49mph @ 5700/5800
-----------------------------------------------------
Wind and Weight really affect the numbers

[HatTrick]

1986 20' CC w/2005 150 Yamaha 4-stroke no bracket
14.5 x 17 aluminum prop
40 mph on gps at 5100 rpms trimmed
Don't know gallons/hr - it's low
Motor is heavy but sweet