Injectors?-gctid394773

[Guest]

Hi All,

Out for the second time of the season and the boat is running very well. Getting close to our destination so I take the throttles up to 2800 to "blow things out". Engines are running fine for 5 minutes then the port loses rpm's and drops to 2200, I throttle both engines back, then back up again to 2800. Both engines maintain rpm's for a few minutes then port again drops to 2200. Up until that point we were running anywhere from 2200 to 2500 just fine for over 3 hours with no change in rpm. After that point we were still able to maintain 2200 to 2400without any problems. Sea conditions were mirror calm.

Thoughts please. I am thinking fuel filter or the need for injector cleaning/service.

1995 3288 with 150's

Thank you in advance.

JV

[The_Other_Gary]

Injectors are either OK or not,

I suspect plugged fuel filters ot supplying enough at high RPMs

[Guest]

Check your fuel filter first. It's easier and cheaper to determine whether it is a cause of your problem. The injectors can be rebuilt. Check with Mark at Diesel Fuel Injection Service in Portland, OR. They have the ability to rebuild just about any injector on the market; and their prices are great!

[mmichellich]

If you do not have excessive smoke lately at cruise, injectors probably OK. Symptoms indicate filters as first place to check.

[Guest]

might try checking your fuel tanks for sludge that gets picked up thru intake hose.

[jmcannonball]

Don't know where you are located, but if you need injectors rebuilt, try Mike at Able Marine in Seattle.

[mmichellich]

JHIBNER wrote:
might try checking your fuel tanks for sludge that gets picked up thru intake hose.

Why not check the fuel filters first? We have no information on how long it has been since they were changed. Lots of fuel filters get plugged with acceptable contaminants in the tanks.

[Guest]

Last sun Earl sucked out one inch of black sludge w big chumks somtimes plugging his copper tube he was using. Now port engine

even more happy

[mmichellich]

JHIBNER wrote:
Last sun Earl sucked out one inch of black sludge w big chumks somtimes plugging his copper tube he was using. Now port engine

even more happy

Was this sludge from one of the tanks on the original posters boat? That was not clear.

[Guest]

No different boat .my boat is 3270 1987.

[Pacrimrat]

+ 1 ON FILTERS FIRST.

When troubleshooting always start with the most obvious, easiest and cheapest things first.

Filters (both), tank vent (my vents on my 95 were corroded down to about 10%), dirty tank (plugged pickup), collapsing fuel line, and the list goes on from there. $$$

[Guest]

Check your manual pump on the side of the block, make sure it has not vibrated loose and extended. This will cause the problem you discribe.

Ron

[Fire Escape]

When troubleshooting always start with the most obvious, easiest and cheapest things first.

$$$[/QUOTE]

I once experienced what you are describing. I found that when adding coolant I had bumped a valve on the fuel manifold. The engines ran fine up to about 2,000 RPM then starved for fuel. I agree with the other posters, it does sound like a fuel issue.