76 Seacraft 23

[Islandtrader]

I dug this out from my old post last summer...

Motor is new less than 3 hours in the test. I have a feeling that I may be under propped when the stroker loosens up. Not by much.

rpm- gph- mph- mpg-

1000/ 2.1- 6- 2.8

2500/ 6 - 23.5 - 3.9

3000/ 9 - 29 - 3.2

3500/ 12.5 - 34 - 2.7

4000/ 14.1 - 42 - 3.0

One quick blast up to 50 @ 4900.

It seems when you hit 2500 rpm the mph from there on up almost = rpm.

My other two motors where carbed. However at the same rpm rate the gallons per hour where about the same. The miles per gallon changed.

Hope this helps...still flummoxed on the b2.

[bigeasy1]

Originally Posted by Islandtrader

I dug this out from my old post last summer...

Motor is new less than 3 hours in the test. I have a feeling that I may be under propped when the stroker loosens up. Not by much.

rpm- gph- mph- mpg-

1000/ 2.1- 6- 2.8

2500/ 6 - 23.5 - 3.9

3000/ 9 - 29 - 3.2

3500/ 12.5 - 34 - 2.7

4000/ 14.1 - 42 - 3.0

One quick blast up to 50 @ 4900.

It seems when you hit 2500 rpm the mph from there on up almost = rpm.

My other two motors where carbed. However at the same rpm rate the gallons per hour where about the same. The miles per gallon changed.

Hope this helps...still flummoxed on the b2.

Boy those are nice numbers,compared to mine.I've tried lots of props and found the best to be a ss Mirage 15x17.I get good wide wot speeds at the right rpms,but the best I can get is about 37 mph,and that's pegged.

My fuel burn(Flo-Scan) is quite a bit more than yours as well.Maybe it's the difference between the ctr.console and cuddy models.
I figure conservatively my boat weighs 5500 lbs with everything including three guys.
Heck,at 34 mph,I'd be running at 4000 rpms,and burning around 19-20 gph while your at 42mph,and only burning 14 gph.

I'm thinking the weight difference between the model design,and the extra weight from the kicker motor and four down riggers with 15lb weights,and the resistance from all the canvas work is the reason.At least I hope so.

[martin]

Thanks for the info it was really helpfu, island trader, are u running a 383 strikers @350hp on a b3 drive that's some serious speed