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Old 09-09-2016, 01:18 AM   #1
Lt. JG
 
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Default 3700 SCR Top End Speed

Hi All,
I currently own a 2000, 3000 SCR with twin 5.0L merc outdrives with Bravo ll's. I get about 40 MPH as a top end speed with a nice cruising speed around 28-32 MPH.
I'm looking at moving up to a 2001 3700 SCR with twin 7.4L MPI's with v-drives. The broker indicates that the boat will top end at about 27 MPH. This seems a bit slow to me.
Anyone out there with a 3700 that can provide some feedback as to what I would expect to achieve as a top end and general thoughts on this boat.

Thanks,
Mike
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Old 09-09-2016, 01:51 PM   #2
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The larger the larger the boat the slower the max and cruise speeds will be. I cruise at 22-23 kts all the time in a 2800, however if I cruised at 30, fuel consumption would be horrible and I'd get the snot beat out of me. I suspect that is the difference between freshwater and saltwater.

Slow is relative.
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Old 09-09-2016, 03:01 PM   #3
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Originally Posted by mikebmaxum3000 View Post
Hi All,
I currently own a 2000, 3000 SCR with twin 5.0L merc outdrives with Bravo ll's. I get about 40 MPH as a top end speed with a nice cruising speed around 28-32 MPH.
I'm looking at moving up to a 2001 3700 SCR with twin 7.4L MPI's with v-drives. The broker indicates that the boat will top end at about 27 MPH. This seems a bit slow to me.
Anyone out there with a 3700 that can provide some feedback as to what I would expect to achieve as a top end and general thoughts on this boat.

Thanks,
Mike
Is that your indicated water speed or GPS? My 3200 with 7.4Ls tops out at 38-40 and cruises at 25-26 mph (3400 rpm)...
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Old 09-09-2016, 03:28 PM   #4
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That is the top speed as indicated by the Broker. Not sure if that is spedo or GPS. In any event is sounded pretty slow. In nice weather we currently cruise nicely at about 30 mph. I'm guessing that if I have to run at wide open throttle it is not good for the engines.
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Old 09-09-2016, 06:16 PM   #5
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Originally Posted by mikebmaxum3000 View Post
That is the top speed as indicated by the Broker. Not sure if that is spedo or GPS. In any event is sounded pretty slow. In nice weather we currently cruise nicely at about 30 mph. I'm guessing that if I have to run at wide open throttle it is not good for the engines.

The engines are not designed to be ran at WOT for more than a few minutes at a time.
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Old 09-09-2016, 06:41 PM   #6
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Originally Posted by mikebmaxum3000 View Post
That is the top speed as indicated by the Broker. Not sure if that is spedo or GPS. In any event is sounded pretty slow. In nice weather we currently cruise nicely at about 30 mph. I'm guessing that if I have to run at wide open throttle it is not good for the engines.
Sorry, my question was directed at the speeds you said for your current boat, not the new one. Just wondering if maybe a water speed dreamometer number has your expectations unrealistically high.
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Old 09-09-2016, 11:59 PM   #7
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On my Maxum 3000 same set up I run 26mph at 3500rpm in light to fair seas
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