Need and Excorsist!

[jimbo62]

Deep - please keep posting on this as I have the same engines and a similar mystery

[Big Jay]

I got one for you:

Your racor's...you using the same micron element in both?

[Deep C]

Bingo boys we have a fix!

Took a priest, rabbi, clerric, and an eveangelist but we have rpms again.

Yesterday we tamed the black smoke by opening up a bolt on the inner cooler located at the bottom front right of the engine... Don't try this at home but we shot her good with brake cleaner. Got her clean but that also set up a compression lock of sorts and required manual breaker bar crank of the whole engine to free her up and keep from toasting a starter.

We had the problem on the run but rpm was low. We had changed filters before leaving ocean city as we picked up algae in one fuel load. I guess that more algae was poised to plug and had us restricted again within a few minutes. I checked lines and they were good. Racor was good. Mechanic checked lines forward all good??? Nothing left but the secondary... Poured out and didn't "look" bad. Changed anyway and instanty on our test run I could hear the ponies all trying to get out ofthe corall.

Discovered for first time that at 34 knots this boat walks on her keel...

So there you go not a big major issue. Alot of little simple ones... Quite the relief that I'm not gonna get a load of dungeon time doing a major...

[GitchaSome]

NICE DEEP!!!!!! Glad you figured it out!

[clt_capt]

Glad you didn't have to resort to the live Yardbird in the bilge...

[Wireman]

An excorsist? Why wouldn't you try changing out all the primary and secondary filters a second time before calling the mechanic in for a couple days? Not to point out the obvious here, but you said you already knew you had an algae issue leading up to this. I know hindsight is 20/20 and all, but fuel was already waving the red flag at ya.

[Deep C]

Black smoke was the red flag first and foremost. That was the innercooler loaded up. Only after that were we able to get up to the high high end where we started showing any fuel issue... We had changed both primary and secondary.filters and both engines draw from same tank. No issue at all with port side. Starboard wasn't as tollerant. Same fuel same filters same injectors and so on. Only after clearing the smoke late yesterday could we get any indication that there was possible fuel restrictions... Detroit Diesel themselves were the ones who dictated the order of tests.
Now go sell a tent or trailer and make yourself useful dave...

[seapower]

Brake cleaner, on a running engine??? Locked her up tight???? I'd say you'd better hope you didn't bust some ring's!!! Maybe I misunderstood something here, wouldn't be the first time. Frank

[Wireman]

Now go sell a tent or trailer and make yourself useful dave...

I prefer you call me Jud. I thought you said I work on a farm. Stop confusing me and focus on your filters. Your boss will appreciate the savings next time around.

[Deep C]

Nope not on a running engine. The second cooler in the line up was sooted and sludgy when we opened her up to get a pressure read from that end of the blower. Instead of tearing the whole engine down he shot it with brake cleaner in place. Though most of it drained some stayed and hydraulicly tightened her up. Manually cranked her through for a couple revolutions to free that up... Compression this early morn was good all the way around...

I've never seen it done to diesels before but I remember seeing similar "trick" done with gas engine airboxes and even a yamaha excell carb before... Something in it is hell on carbon build up. Have to use the right kind though...