3400-3600 RPMs is what I cruise at. On occasion, I crank her up to "blow out the carbon" but for no longer than a 30 second shot.
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| Author: | firecadet613 [ Sun Jul 28, 2013 9:43 pm ] |
| Post subject: | 318 Cruising RPM's/Speed |
This topic came up in a conversation I had a few days ago. What RPM/Speed do you run your boat at during a long cruise? 3650-3750RPM is where I try to keep it, which gives me about 27MPH with the twin 5.0's I have. 4000RPM she runs real nice, but I feel that is to high of an RPM to turn for any length of time, as I've heard 75% of max RPM is the cruising RPM. What do my fellow 318 owners run at? |
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| Author: | SW Florida Dave [ Mon Jul 29, 2013 7:27 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
I normally run at about 3900, which puts me at 29+. Easy cruise speed and comfortable ride, the bow attitude nice a flat. |
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| Author: | Partycove2 [ Mon Jul 29, 2013 7:42 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
3400 and 27MPH SOG |
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| Author: | firecadet613 [ Mon Jul 29, 2013 8:37 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
SW Florida Dave wrote: I normally run at about 3900, which puts me at 29+. Easy cruise speed and comfortable ride, the bow attitude nice a flat. No concerns with your engines spinning that fast for such a long time? How many hours do you have? |
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| Author: | jsimon [ Mon Jul 29, 2013 8:50 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
3900-4000 which gets me around 30 mph. Personally I don't think 1-200 rpm is going to hurt the motors. Maybe I, wrong, that's where it seems to run the best for me. |
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| Author: | firecadet613 [ Mon Jul 29, 2013 8:56 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
You may be right, the boat does seem to ride better and smoother at that speed. This is my " long-term" boat... meaning at least more than two seasons! |
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| Author: | ric [ Mon Jul 29, 2013 9:48 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
I'd keep it under 4k, but that's just me. |
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| Author: | pamunkey411 [ Tue Jul 30, 2013 4:16 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
I like 3,500 in my 318 |
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| Author: | taz42169 [ Wed Jul 31, 2013 5:55 am ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
3400-3600 RPMs is what I cruise at. On occasion, I crank her up to "blow out the carbon" but for no longer than a 30 second shot.
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| Author: | jsimon [ Wed Jul 31, 2013 7:59 am ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
Here is a test mercury did on an '06 318 with the 300 mpi bravo 3 setup. 4000 rpm is the sweet spot and the best fuel economy. A whopping 1.3 mph http://www.mercurymarine.com/enginetests/boat_house_bulletin.php?ID=295&20343.031261759195 |
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| Author: | firecadet613 [ Wed Jul 31, 2013 11:20 am ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
Partycove2 wrote: 3400 and 27MPH SOG Do you have bottom paint? |
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| Author: | Partycove2 [ Wed Jul 31, 2013 1:54 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
yes |
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| Author: | jnizi [ Wed Jul 31, 2013 2:22 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
That is just about my results. 3500RPM = 27mph. We are around 1.1 - 1.2 MPG. |
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| Author: | SW Florida Dave [ Thu Aug 01, 2013 9:15 pm ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
I guess each boat is a little different depending on loading, fuel and misc. I have around 290 hours knocking on wood writing this with no major issues just the normal nuisance crap. |
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| Author: | Partycove2 [ Sun Aug 04, 2013 8:42 am ] |
| Post subject: | Re: 318 Cruising RPM's/Speed |
 Hard to see, but 28.3 SOG |
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