Got a 1989 Carver 3207 with Dual 5.7 gas Merccruisers. Engines run fine at 2500 RPM I can run forever. Go to 2800 on the Starboard engine and RPM drop right down nothing. Gas Filter changed, no change. No real change in exhaust except it smells like it is running lean on that engine.
Seems like fuel starvation problem or by reading here also looks like it could be plugs and wires or maybe weak fuel pump. Anyone here with a similar problem on a similar vintage?
thanks
Ron
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!
Loss of RPM above 2500
-
ronniemacd
Topic author
- Scurvy Dog
- Posts: 1
- Joined: July 22nd, 2019, 10:48 am
- Vessel Info: 1989 Carver 3207 with Dual 5.7L Merccruisers
- Location: Canada
-
waybomb
- CYO Moderator
- Posts: 2407
- Joined: February 5th, 2013, 9:24 pm
- Vessel Info: 1995 Boston Whaler Rage15
1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glasspar / 1967 Johnson Electromatic 85
1996 Boston Whaler Rage 15 - Location: Saint Joseph,Mi
- Has thanked: 50 times
- Been thanked: 397 times
Re: Loss of RPM above 2500
I believe you have two fuel filters for each engine. One spin on and one in the carb. Did you get both?
If so, I'd check the fuel tank vent screens.
And with the age of the boat, change the anti-siphon valves.
As a start.
If so, I'd check the fuel tank vent screens.
And with the age of the boat, change the anti-siphon valves.
As a start.
Thanks
Fred
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572 ci
1995 Boston Whaler Rage
Past - 1988 2807, 1989 4207 Aft
Fred
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572 ci
1995 Boston Whaler Rage
Past - 1988 2807, 1989 4207 Aft
-
km1125
- Admiral
- Posts: 3342
- Joined: February 28th, 2017, 6:04 pm
- Has thanked: 57 times
- Been thanked: 968 times
Re: Loss of RPM above 2500
Definitely follow Waybombs suggestions.
I'm curious though how you're smelling it "running lean"?? Is it just "not rich"?
I'm curious though how you're smelling it "running lean"?? Is it just "not rich"?
-
Torsson
- Scurvy Dog
- Posts: 29
- Joined: July 10th, 2018, 3:43 pm
- Vessel Info: Carver 28 Voyager 1988 Twin 350 Crusaders
- Location: Sweden
- Been thanked: 1 time
Re: Loss of RPM above 2500
Clean the Flame arrestor with soap and toothbrush, let it dry good before you put it back. That got my engine running nice after i got the tip on this forum. The oil film that gathers around it will make the engine to not get enough air. Hope it helps
-
Viper
- CYO Supporter
- Posts: 5803
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 431 times
- Been thanked: 1586 times
Re: Loss of RPM above 2500
Could be fuel or ignition related. When was an ignition tune-up last done?
Return to “Gas Engines/Transmissions”
Who is online
Users browsing this forum: No registered users and 23 guests
Sponsors