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Carver 356 RPM issues

GAS engine, transmission and generator repair and maintenance discussion forum.
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cpoint
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Vessel Info: 2000 Carver 356 aft cabin
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Re: Carver 356 RPM issues

Postby cpoint » August 1st, 2017, 11:00 am

Sorry guys, did not get back here for a while. Good news is finally past few weeks all is good. Both engines are working fine, I think port side tank is finally cleaned out. maybe some minor crap in there, but all is fine. Sync indicator is usually in the center, but sometimes it just goes far right or far left. I do not think engine issue though, must be the gauge or wiring. Because tachometers are now stable, and are in sync with each other. I will look into sync gauge, but I am not bothered by that as I was with port tachometer going crazy in the past. The starboard is now OK as well, I did put some sea foam, not sure that fixed it or it just decide to fix itself. Anyway for now its all good, and we are finally enjoying the weekends.

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cpoint
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Re: Carver 356 RPM issues

Postby cpoint » October 11th, 2017, 3:06 pm

I am back to port side RPM issue. The mechanic replaced some part because he said fuel pressure was too high and said after replacing it was normal pressure. So I did sea trial myself and instead of going crazy RPM at 2500 RPM, now it goes at 2000 RPM :banghead: Max I am getting is 12 knots. because port side is just hoovering around 3000 RPM if I take it all the way. Port side also showed 500 RPM over what it was suppose to be. But when I banged on the tachometer with my fingers it dropped to normal. So I am pretty sure that's a tachometer issue and not engine issue.
One other thing, I have good deal of growth under the boat mostly moss like stuff. But I believe that will affect maybe 1 or 2 knots. Definitely issues on port side still. Almost everything been replaced on port side. Not sure where I can find a better mechanic :-(

Also I still have bad stuff in fuel, need to get that cleaned for the 4th time :censored: AARRRRGGGGHHHHHHHH!!!!!

bud37
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Re: Carver 356 RPM issues

Postby bud37 » October 11th, 2017, 4:39 pm

So I just reread your posts re this issue....has your guy followed any of Vipers and others suggestions about running on a known good portable tank.....also has the anti siphon valve on the suspect tank been looked at.....if you are in salt and have growth you may just only get 12 out of it and the engines will not rev up because of the load......quite honestly , I believe you have had enough good gas thru there for that not to be a problem.
Man you sure are snake bit with this one though, good luck with it.
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mjk1040
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Re: Carver 356 RPM issues

Postby mjk1040 » October 12th, 2017, 5:08 am

Sea Foam is a good product, but understand sea foam will stir up the crap in your tanks and send it to your filters. Had sea foam or something of the same nature had been used since day one, most likely we would have no fuel issues today!
Mike :down:
I'd Rather Be Boating!
1989 Sea Ray Seville
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
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cpoint
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Re: Carver 356 RPM issues

Postby cpoint » October 13th, 2017, 10:40 am

Bud and Mike, thanks for the feedback. Between lack of time and lack of mechanical knowledge. I am depended on the guys that work on it. And combination of these I mention are bad results unfortunately. What I need is a good mechanic that I can trust and talk to. These company guys that have enough jobs, so they are difficult to talk to or provide some of these things you guys ask me to verify. In any case I am stuck with it for now. So you are saying growth under it though would cause to max out around 12 knots? Anyway, I have the fuel cleaning guys scheduled after the Annapolis boat show. As far as bottom cleaning, I think that's going to be next year, when I get the bottom painted, it will be cleaned out, as the season is coming to an end this year.

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