23 sceptre performance

[bgreene]

Originally Posted by jongolds

I have a 300hp Etec and a large hardtop.
I get about 2 mpg at a about 27mph.
WOT at about 5700 RPM is anywhere from mid 40s to low 50s mph depending on conditions and load.
This is with a 4 blade prop. I don't recall the pitch but can report back on that if anyone cares.

How many gallons does the tank hold ?

[Bushwacker]

FYI - Here's an article I saved from Boating Magazine from 1973 where they tested a couple of the 23'Tsunami/Sceptre's with a pair of I-6 Mercs and MerCruisers that will give y'all a feel for the boat's performance when new!

[jongolds]

My tank holds 90 gallons. I just noticed that someone did actually want me to check out the pitch on my prop. I will try to remember to do so tomorrow. Sorry for the long delay. I know I owe someone the length of the setback on my platform too.

[bgreene]

Originally Posted by 77SceptreOB

I've got a 1977 Sceptre 23 and I run a 1988 Yamaha V-6 Excel (225 hp) two stroke.

Using a 15" x 17 pitch aluminum prop I get:

Cruise = 30 mph at 4200 rpms burning 11 gph equaling around 2.7 mpg

WOT= 38 mph at 5100 rpms burning 17.5 gph equaling around 2.2 mpg

Those number are per my Lowrance HDS-7 equipped with a fuel flow sensor. All are based on light load run on a large fresh water lake with light chop at 80 degree temperature.

My engine weighs 411 pounds, which is pretty light for its power and size.

From a set up point my cavitation plate is 1-1/2" above my keel at the transom

With engine trimmed up for max WOT performance, believe you should be running at least 500 rpms faster at approx. 5,500. Better for the engine, and better performance. Just a thought.

[eggsuckindog]

a 300 set up nice and high with a good prop without a hard top will damn near
scare you - trust me
I had a V8 Rude on one, not that you can afford to feed one now, but it would run - in the ICW you have go fasts reaching for the trim button

a 250 which you could find more options on would be great