Excessive load percentage and lack of power

[michael gallagher]

I have a pair of 2005 QSB 5.9’s in my 36 Tiara Open and having issues with starboard side. The engine is making excessive vibration at all rpm’s, will not turn up to max rpm under load, show’s 10% higher load at idle rpm and is 20-30% higher load when at matching throttle rpm’s and percentage of throttle. Without the assistance of the port engine the starboard will not reach 2000 RPM and when both engines are at WOT, its at least 500 RPM lower then the port strong side. The engine will reach max RPM 0f 3060-70 at WOT out of gear but is consuming more fuel, and show’s higher load percentage then the port side. I checked the turbo blade and its spinning free in both directions, the engine is not smoking at start up or any throttle range with or without load. I’m guessing its a fuel delivery/injector issue but have not had a lap top scan for diagnosis yet. Any ideas on what I may be dealing with would be appreciated.

Topic

[michael gallagher]

Problem solved

As luck would have it the problem was found by a 4th set of eyes prior to any lap top diagnosis. One of the connectors on the top of the engine which is connected to the 5 and 6 cylinders separated enough to cut off the two engine cylinders. With a tiny squeeze my issue went away thanks to a butt connector. Thanks for the helpful responses that you all provided.

[Tony Athens]

How about some solid history of the operation over the last year or more.. Past performance, etc etc etc etc etc,

Tony

[Rob Schepis]

“Excessive Vibration” — you mean at sea trial or is it vibrating at the dock?

Has she been short hauled for a close inspection of the running gear?

[Stephen Oliver]

Sure the prop / Shaft / Gearbox are not snagged / damaged / bent / rope caught?

Steve

[Author]

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