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Old 10-22-2014, 12:44 PM   #21
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1998 2800 scr
7.4L carbed
cruise 3400 rpm 25 mph 2 people on board
WOT 4300 rpm 36 mph
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Old 10-22-2014, 01:40 PM   #22
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1994 3200 SCR
Twin 7.4L carbureted
3200 rpm = 24 mph
3500 rpm = 30 mph
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Old 10-26-2014, 10:22 PM   #23
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1999 3000 SCR
Twin 5.0L with Bravo II drives 3 blade aluminum props (don't know the dimensions)
1800 RPM, between 6 and 8.5 Kts, depending on tide and sea conditions.
3600 RPM, 21 to 23 Kts (again depending)
4000 RPM, about 24-25 Kts.

I'm still new to the boat, and getting the feel for her and her fuel consumption. I spend a lot of time cruising in the 7 Knot range, and it seems to be about double the fuel mileage, around 2 MPG. Seems to be around 1 MPG at 21 Kts.
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Old 12-13-2014, 03:33 AM   #24
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1995 2700 scr 7.4L Bravo 2 21" pitch aluminum 3 blade quicksilver prop. If I remember right, to plane 3500-3600 rpm = 25-28 mph. 3800 RPM = 30 mph which feels nice and high on the water with no feeling of trying to fall off plane. 3950 RPM maxed = 33 mph. With 3950 being all I can get with the 21" I have a 19" pitch aluminum prop to try next year and see what that does. I assume my engine may be played out and/or under powered for the boat , fuel, water and gear I carry to only get max 3950 rpm. I usually have full fuel and water.
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Old 12-13-2014, 01:06 PM   #25
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Quote:
Originally Posted by canada randy View Post
1995 2700 scr 7.4L Bravo 2 21" pitch aluminum 3 blade quicksilver prop. If I remember right, to plane 3500-3600 rpm = 25-28 mph. 3800 RPM = 30 mph which feels nice and high on the water with no feeling of trying to fall off plane. 3950 RPM maxed = 33 mph. With 3950 being all I can get with the 21" I have a 19" pitch aluminum prop to try next year and see what that does. I assume my engine may be played out and/or under powered for the boat , fuel, water and gear I carry to only get max 3950 rpm. I usually have full fuel and water.
typically you gain 200 rpm for every inch decrease of pitch.
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Old 12-14-2014, 10:42 PM   #26
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The 19" may help then. I think the engine is rated to run 4200 rpm to 4400 rpm full throttle. The diameter increases with the 19" though. 17 3/4" x 21" pitch vs 18 1/4 x 19" pitch.
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Old 12-15-2014, 03:42 PM   #27
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I cruise at 3400 rpm... no clue how fast i'm going or how much fuel i'm burning.


2004 2500SE
6.2L Merc
BIII outdrive
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