Welcome to Carver Yachts Owners Forum
We are a boating forum for owners of Carver Yachts to enthusiastically discuss all aspects of Carver Boat ownership. Whether you are looking for your first Carver or currently own one, you are sure to feel at home on CarverYachtOwners.com
You are currently viewing our board as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have access to searching the forum topics, post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
Question regarding cruising rpm's
- denpooch
- Commander
- Posts: 385
- Joined: April 9th, 2017, 8:03 pm
- Vessel Info: 2005 360 Mariner
Crusader 6.0 Captains Choice - Location: Long Island
- Has thanked: 85 times
- Been thanked: 86 times
Question regarding cruising rpm's
I just got back from a trip and ran my 6.0 Crusader's around 3200 rpm to 3400 rpm's. The Mariner weights about 9 tons.
I mentioned this to a friend and he said that I was nuts running over 3k. He said that car engines never run that high and the I will probably shorten the life of the motors.
On my last boat which was a 34 ft express cruiser weighing in at about 13,000 lbs, I never ran the 454's over 3,000 rpm's. I sold her with over 2,000 hours and never had to rebuild the motors.
Am I pushing it at 3200 to 3400? Thanks for your thoughts.
-
- CYO Supporter
- Posts: 5977
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 455 times
- Been thanked: 1671 times
Re: Question regarding cruising rpm's
How many hours are on them currently?
- denpooch
- Commander
- Posts: 385
- Joined: April 9th, 2017, 8:03 pm
- Vessel Info: 2005 360 Mariner
Crusader 6.0 Captains Choice - Location: Long Island
- Has thanked: 85 times
- Been thanked: 86 times
Re: Question regarding cruising rpm's
I purchased in June 2017 with 237 hrs. Now I am at about 560 hrs. I do try to keep on top of maintenance.
-
- CYO Supporter
- Posts: 5977
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 455 times
- Been thanked: 1671 times
Re: Question regarding cruising rpm's
BTW, if you're concerned about longevity running them at that rpm all the time, there is no "try" to keep on top of maintenance, it's a must!
-
- CYO Supporter
- Posts: 2307
- Joined: March 28th, 2016, 10:52 pm
- Vessel Info: 1998 Carver 355
Suspicious Fishes !
2022 Kawasaki 310X - Location: upper chesapeake bay
- Has thanked: 324 times
- Been thanked: 595 times
Re: Question regarding cruising rpm's
-
- CYO Supporter
- Posts: 5977
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 455 times
- Been thanked: 1671 times
Re: Question regarding cruising rpm's
- bud37
- Admiral
- Posts: 4866
- Joined: April 23rd, 2015, 10:22 pm
- Has thanked: 579 times
- Been thanked: 1210 times
Re: Question regarding cruising rpm's
denpooch wrote:Source of the post I mentioned this to a friend and he said that I was nuts running over 3k. He said that car engines never run that high and the I will probably shorten the life of the motors.
There is actually some truth to this in your case......certainly not the comparison to the car engine use though as has been pointed out, unless the car is towing a heavy trailer up a long grade for its whole life.
It is more about the small block vs big block comparison you pointed out.......your old boat weighed less and you had big blocks that have considerable more mass and can take more hp with less flexing and loss of useable life.
You now have a much heavier boat with small blocks putting out more hp at WOT than the 454's you had.That says they will not last as long. More hp used equals more fuel.You will within reason use the same hp to move your boat at 20knots no matter what engines you have, the big block will just handle it for a longer time ( hours )in my opinion.
If you want a true measure of how you are using the engines up, get some fuel flow meters ( which may already be there with your captains choice ), that will give you a good gage on how much hp you are using at any given throttle setting.
Two eco spots are below hull speed ( 5knots or so ) and on plane and trimmed ( the sweet spot Viper mentioned )
One thing you do get with these stroked small blocks is great fuel mileage at hull speed, mine is wonderful.
- denpooch
- Commander
- Posts: 385
- Joined: April 9th, 2017, 8:03 pm
- Vessel Info: 2005 360 Mariner
Crusader 6.0 Captains Choice - Location: Long Island
- Has thanked: 85 times
- Been thanked: 86 times
Re: Question regarding cruising rpm's
When you are cruising on plane where do you run the rpm's?
Thanks.
- denpooch
- Commander
- Posts: 385
- Joined: April 9th, 2017, 8:03 pm
- Vessel Info: 2005 360 Mariner
Crusader 6.0 Captains Choice - Location: Long Island
- Has thanked: 85 times
- Been thanked: 86 times
Re: Question regarding cruising rpm's
Preferred WOT RPM is 5000.
Cruising RPM (Max) is 4000.
Seems like the 3400 range is well within safe operating standards for this engine. I do believe that brings me around Vipers sweet spot although I will experiment around a bit.
- RGrew176
- Admiral
- Posts: 6388
- Joined: August 17th, 2015, 4:07 am
- Vessel Info: 2022 Stingray 182 SC
- Location: Southgate, MI.
- Has thanked: 72 times
- Been thanked: 467 times
Re: Question regarding cruising rpm's
My cruising speed is 15 to 16 MPH and my WOT speed is 25 MPH.
2022 Stingray 182 SC
2004 Past Commodore
West River Yacht & Cruising Club
Return to “General Boating Discussion”
Who is online
Users browsing this forum: No registered users and 126 guests