define "cruise speed"
#21
Registered
Joined: Jun 2012
Posts: 64
Likes: 0
From: Las Vegas, NV
Cruise Speed is an RPM where your Not hurting the motor by running a Long distance at that speed/RPM. Usually about 3500 rpm, anyone who has a cruise rpm much higher than that doesn't grasp the idea. You Can gear & Prop your boat to be fast at cruise rpm, but acceleration and Top speed will suffer.
#23
Registered
Joined: Mar 2002
Posts: 2,142
Likes: 3
From: Miami Beach
28 Daytona twin 496 mags
top speed 90 @ 4900 rpm
Cruise 70 @ 4000 rpm
37 Spectre twin Yanmar diesels
top speed 55 @ 3800 rpm
cruise 38 @ 2900 rpm
Fast cruise 45 @ 3300 rpm
The eliminator had to be going over 50 to ride well, no tunnel spray ect, and fuel economy was the same from 40 to 70 so usual speed was 70.
the spectre i usually run around 38 upper 40's if i am in a hurry, I can run those diesels forever at 3400 rpm, but economy is better around 38. I know it's dead slow compared to a go fast but different kind of boat, although it does ride better as you speed up!
top speed 90 @ 4900 rpm
Cruise 70 @ 4000 rpm
37 Spectre twin Yanmar diesels
top speed 55 @ 3800 rpm
cruise 38 @ 2900 rpm
Fast cruise 45 @ 3300 rpm
The eliminator had to be going over 50 to ride well, no tunnel spray ect, and fuel economy was the same from 40 to 70 so usual speed was 70.
the spectre i usually run around 38 upper 40's if i am in a hurry, I can run those diesels forever at 3400 rpm, but economy is better around 38. I know it's dead slow compared to a go fast but different kind of boat, although it does ride better as you speed up!
#24
We did agree you cover my fuel bill for the first month of owning the boat. I am sure we will go throw a few gallons the first weekend out at LOTO. See you tomorrow.
#29
depends on the boat + power. For our 388, 3500 rpms seems to work real well. In the hdrostream, it's about 3000 rpms, but it's a mod-tunnel hull also.
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#30
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Joined: Oct 2004
Posts: 870
Likes: 0
From: Long Island, NY
It varies for all. I run with twin outboards that do not like low RPM's. My top end is 5900-6100 RPM's, but I cruise at 5400-5700. The motors are made for that. 5 boats ago, I would cruise at 4000 with a Merc outboard. It all depends.





