If the outdrive came with the 3.0 odds are high the ratio is 2-1. I have some experience with everything mentioned here, so here goes
A 3.0 pushed our 2007 Bayliner 175 around great, hit 44 mph once at just under 5000
with the stock 15x19 prop.
The X factor: the Bayliner only weighed like 1800 pounds...
Our SkipperLiner is essentially flat bottomed, drafting 14" or less.
It's pushed around by two 2.5 Mercruisers, just smaller versions of the 3.0
The props we got with it were 16 x 9 pitch (16" just barely fits the Alpha),
first year out I hit 9.9 mph on the GPS at WOT, about 3800 rpm (4400 altitude),
cruise speed was 6.8 to 7.2 GPS at 2800-3000 rpm. Great gas mileage.
I now have 15x13" pitch props that were tweaked back to 12 (so I was told),
the boat now hits 7 mph at 2400 rpm (see the pic), but my max rpm is only about
3400 with speed hitting about 9 mph. Props are a bit steep, but that's a whole nuther story...
Our Party Cruiser is a 32' twin-log pontoon with a cabin & full canvas, and it's pretty
heavy, could use a 3rd log. The logs average about 55% submerged at rest, so it
plows pretty good. It's running a 115 hp Mariner 2-stroke outboard,
and it cruises around 10 mph at 3800-4000 rpm with a 13x13 prop.
WOT I almost hit 14 mph once, but with some weight gone it would probably hit 14+...
SO-- if your boat is 35', the 3.0 should get it pretty close to 10 mph, just be sure to get a "pusher" prop for it.
And pretty much anything over 100 hp in an outboard should be pretty much the same story.
X-factor: the TWO Mercruisers in our 36,000# houseboat burns about 70% of the gas that the
ONE outboard on our Party Cruiser burns. If you can use an I/O, I'd avoid the outboard!
(but that's me)
1988 SkipperLiner 53x14
1995 Tracker Party Cruiser 32 *for sale*
2003 Chaparral 260 SSI
2000 Allegro Bus 40' DP
02:51:17 PM by
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