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HOW FAST IS YOUR MAC ?
Posted: Tue May 26, 2009 11:59 am
by irayone
Just want to get an idea of how fast your boats are ???
1. MOTOR
2. YEAR
3. TOP SPEED BALLAST FULL
4. RPM
5. KNOTS
6. BALLAST EMPTY
7. RPM
8. KNOTS
9. PROP SIZE
Re: HOW FAST IS YOUR MAC ?
Posted: Tue May 26, 2009 12:16 pm
by c130king
irayone wrote:Just want to get an idea of how fast your boats are ???
1. MOTOR -- Mercury 40 HP 2 Stroke (with Powerthruster)
2. YEAR -- 2005
3. TOP SPEED BALLAST FULL -- 11-12 Kts in smooth water
4. RPM -- 5000
5. KNOTS
6. BALLAST EMPTY -- 16 Kts
7. RPM -- 5200
8. KNOTS
9. PROP SIZE -- 8 x 12
Re: HOW FAST IS YOUR MAC ?
Posted: Tue May 26, 2009 3:43 pm
by David Mellon
Just want to get an idea of how fast your boats are ???
1. MOTOR Evinrude ETEC 60
2. YEAR '06
3. TOP SPEED BALLAST FULL 17 MPH
4. RPM 5300
5. KNOTS
6. BALLAST EMPTY 20 MPH
7. RPM 5800
8. KNOTS
9. PROP SIZE[/quote]
Re: HOW FAST IS YOUR MAC ?
Posted: Tue May 26, 2009 5:02 pm
by jaguar496
[quote="irayone"]Just want to get an idea of how fast your boats are ???
1. MOTOR SUZUKI 40 HP 4 STROKE
2. YEAR 2008
3. TOP SPEED BALLAST FULL
4. RPM 5900
5. KNOTS 13KTS
6. BALLAST EMPTY
7. RPM 5900
8. KNOTS 15-16KTS
9. PROP SIZE9X12.5
Re: HOW FAST IS YOUR MAC ?
Posted: Tue May 26, 2009 5:20 pm
by Duane Dunn, Allegro
irayone wrote:Just want to get an idea of how fast your boats are ???
1. MOTOR Tohatsu TLDI 90
2. YEAR (Boat) 1996 X, (Motor) 2005
3. TOP SPEED BALLAST FULL
4. RPM 5,500
5. KNOTS 18 knots (20.7 mph)
6. BALLAST EMPTY
7. RPM 5,600
8. KNOTS 22 knots (25.3 mph)
9. PROP SIZE 14" x 11" factory aluminum
Pretty good speed considering I have a very heavily loaded boat setup for extended cruising with my family on board. In general I never run WOT with ballast. If I want to go fast or far under power I always dump any ballast. I take her up to around 4,500 RPM, this gets me in the mid 14 knots for speed with a nice high bow, when the speed peaks out in the upper 16's I know the tank is empty.
Re: HOW FAST IS YOUR MAC ?
Posted: Tue May 26, 2009 5:56 pm
by John Christian
Just want to get an idea of how fast your boats are ???
1. MOTOR Suzuki DF 70
2. YEAR 2007
3. TOP SPEED BALLAST FULL 16 - 17 Knots in calm lake
4. RPM 5000
5. KNOTS
6. BALLAST EMPTY 19 - 20 Knots
7. RPM 5400
8. KNOTS
9. PROP SIZE 14 x 11
Bottom Paint
Re: HOW FAST IS YOUR MAC ?
Posted: Wed May 27, 2009 3:53 pm
by Hardcrab
I've had our M at least to 75 mph on my first trip up I-15 from So Cal.
It was uphill to!
Handled well as I recall.
RPM's about 3400, downshifted to fourth gear.

Re: HOW FAST IS YOUR MAC ?
Posted: Wed May 27, 2009 4:20 pm
by SkiDeep2001
hardcrab,

hope you have your boat strapped down. 1st time driving truck/boat (17' Glaspar with 90Merc) on the Cariboo hiway in BC just south of 100 mile house and dad was asleep,I'm 15 so had it up to 70+ mph not kph and boat was loaded with gear and when I looked in mirror it was floating above the trailer, swaying side to side.

We forgot to strap it down and I got it slowed and pulled over before anything happened. If you don't have one, buy a strap. It might save you a big headache in future.

Re: HOW FAST IS YOUR MAC ?
Posted: Sun Jul 05, 2009 6:25 pm
by Steve
1. MOTOR: 50hp/4str. Yamaha
2. YEAR: '99
3. TOP SPEED BALLAST FULL: 15 mph
4. RPM
5. KNOTS
6. BALLAST EMPTY: 19.6 mph
7. RPM: around 5000
8. KNOTS
9. PROP SIZE: 3 fin stock that came with it
Re: HOW FAST IS YOUR MAC ?
Posted: Mon Jul 06, 2009 8:42 am
by rwmiller56
1. MOTOR
Johnson 4S 50 HP
2. YEAR
2005
3. TOP SPEED BALLAST FULL
12 kts
4. RPM
5800
5. KNOTS
6. BALLAST EMPTY
Haven't tried yet.
7. RPM
8. KNOTS
9. PROP SIZE
Re: HOW FAST IS YOUR MAC ?
Posted: Mon Jul 06, 2009 10:48 pm
by PatrickS
1. MOTOR
2007 Mercury 50ELPTO, 50hp 2stroke
2. YEAR [AND MODEL]
2001 26X
3. TOP SPEED BALLAST FULL
11 knots
4. RPM
5600
5. KNOTS
??
6.[TOP SPEED]BALLAST EMPTY
16 knots
7. RPM
5600
8. KNOTS
??
9. PROP SIZE
13x10.5 IIRC
--
One bit of information missing that would be relevant:
10. DEGREE OF ENHANCEMENTS / GEAR (Pick one):
(a) Stock boat, with no little to no major enhancements and minimal gear.
(b) Relatively stock boat with some enhancements (some elecronics, a stove, etc.) and gear.
(c) Moderately enhanced boat with more comprehensive gear.
(d) Significantly enhanced boat with alot of gear. -> D
FWIW my 26X is equipped for longer term cruising (even liveaboard) with alot of gear, and inspected/certified to Finnish class 2 (coastal) level, with lots of required safety gear, plus lots of convenience enhancements such as chartplotter, autopilot, two VHF, stereo, stove, fridge, paraffin heater, running water, builtin water tank, 24gal fuel tanks, 220AH AGM house bank, shorepower, etc. so I'm glad to still be able to hit 15 knots just by my lonesome -- though I almost never run at WOT, tending to mostly sail or motorsail.
So a realistic comparison would need to take into consideration how much extra a given boat has (I dimly recall the day when my X was stock and the kids wakeboarded behind it... alas, no more... I wonder if we need a MMI formula (Mac Mass Index, a'la BMI, Body Mass Index) to guage how much "extra" our boats have

Re: HOW FAST IS YOUR MAC ?
Posted: Tue Jul 07, 2009 1:23 pm
by Russ
1. MOTOR Suzuki 70 4 stroke
2. YEAR 2008
3. TOP SPEED BALLAST FULL 15mph
4. RPM 4200
5. KNOTS
6. BALLAST EMPTY 19 mph
7. RPM ??
8. KNOTS
9. PROP SIZE ?? prop BWY installed.
Elevation 5500 feet fresh water no bottom paint. These are factors.
Re: HOW FAST IS YOUR MAC ?
Posted: Tue Jul 07, 2009 1:46 pm
by Don T
1. MOTOR - Tohatsu 50 2 stroke carbs
2. YEAR 1995
3. TOP SPEED BALLAST FULL
4. RPM 5200
5. KNOTS 12
6. BALLAST EMPTY
7. RPM 5600
8. KNOTS 15
9. PROP SIZE 12 X 11.5 (BWY special)
Like Duane, I never run more than hull speed with the ballast full. My boat has lots of added weight with mods and equipment for long cruises. I'll have to verify my two prop's pitches cuz' it's been a while since I looked at them.
Re: HOW FAST IS YOUR MAC ?
Posted: Tue Jul 07, 2009 9:31 pm
by Paul L
1. MOTOR Suzuki DF 70
2. YEAR 2005
3. TOP SPEED BALLAST FULL
4. RPM 5000
5. KNOTS 14
6. BALLAST EMPTY Never tried
7. RPM
8. KNOTS
9. PROP SIZE 3x13x13.5
Suzuki manual says correct prop size for a given hull should result in 5700 rpm on the DF 70, but I can't get that with this BWY selected prop. Maybe I could with less load & balast.
Re: HOW FAST IS YOUR MAC ?
Posted: Wed Jul 08, 2009 5:06 am
by Billy
1. MOTOR
Suzuki DF140 (2002)
2. YEAR
2001
3. TOP SPEED BALLAST FULL
4. RPM
6000
5. KNOTS )
25 kts. (29 mph) (moderately loaded)
6. BALLAST EMPTY
7. RPM
6300
8. KNOTS
31.2 (36 mph) (3 ppl)
9. PROP SIZE
18 pitch
Manual states operating rpm 5600-6200---but who counting

Speed actually determined by conditions on water.