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!

1989 Merc 7.4's RPM's

GAS engine, transmission and generator repair and maintenance discussion forum.
Post Reply
User avatar

United States of America
Samuel
Scurvy Dog
Scurvy Dog
Posts: 23
Joined: June 9th, 2017, 7:41 am
Has thanked: 1 time
Been thanked: 1 time

Re: 1989 Merc 7.4's RPM's

Postby Samuel » August 9th, 2017, 5:11 am

I didn't realize the lake was that small.
Top

User avatar

United States of America
mjk1040
Admiral
Admiral
Posts: 1507
Joined: July 30th, 2015, 8:15 am
Vessel Info: 1998 355 AC/MY "Deja Vu"
Location: Savannah, NY
Has thanked: 9 times
Been thanked: 236 times

Re: 1989 Merc 7.4's RPM's

Postby mjk1040 » August 9th, 2017, 7:32 am

I saw a survey like that here in our Marina, and half way in at WOT, Poof! And blue smoke everywhere! And OH S**T! They didn't notice it for what seemed quite a while. Then lip her back in on one engine. Anyone can be a surveyor, but some should not!
Mike :down:
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
Top
User avatar

United States of America
tonyiiiafl
CYO Supporter
CYO Supporter
Posts: 887
Joined: November 19th, 2015, 4:00 am
Vessel Info: 1994 Carver 39 Cockpit Motor Yacht
Location: Cape Cod, MA
Has thanked: 589 times
Been thanked: 175 times

Re: 1989 Merc 7.4's RPM's

Postby tonyiiiafl » August 11th, 2017, 5:43 am

I am a diesel mechanic and bought a gas 390 CPMY. I just don't do the hours per year to merit the premium price of a diesel. I also have 454/7.4 Blue Water Mercs, I hit 3800 WOT and was happy with that. usually run at 2800 to 3000 19 kts. Plenty fast for a boat this size!
Top
User avatar

United States of America
sep4086
Scurvy Dog
Scurvy Dog
Posts: 18
Joined: November 6th, 2015, 6:34 pm
Vessel Info: 1990 3867 SANTEGO
2003 PRO LINE 26 WALK
Location: LAKE MICHIGAN
Has thanked: 2 times
Been thanked: 1 time

Re: 1989 Merc 7.4's RPM's

Postby sep4086 » August 11th, 2017, 8:10 am

The boat might have the wrong size props.
Top
User avatar

Topic author United States of America
Grady2011
Scurvy Dog
Scurvy Dog
Posts: 10
Joined: August 8th, 2017, 11:20 am
Vessel Info: 1989 Carver 3807 Aft w/ Twin 7.4 Mercs and Kohler 9Kw Genset
Location: Lake Texoma, Texas
Has thanked: 2 times
Been thanked: 2 times

Re: 1989 Merc 7.4's RPM's

Postby Grady2011 » August 14th, 2017, 4:39 pm

So I got her back out on the water and eased up to WOT to see what it would do again. Last time I did that must have cleaned some of the junk off of the bottom and cleaned up the carbs a little. Lol. She would hit all around 4300 rpms. I didn't keep it WOT very long but it did make me feel better! I like cruising around 2500rpms.
Top
Post Reply

Return to “Gas Engines/Transmissions”



Who is online

Users browsing this forum: No registered users and 17 guests