6-71 Fuel Pump Problem

[Traveler 45C]

Genesis,Did you use one pump for the whole system or does each engine get its own pump? I’m thinking that one pump would work for the whole system if plumbed correctly.

 

[Genesis]

One pump will work but I prefer the "one for each engine" set up, as that allows me to polish both tanks at the same time.

Here's a photo of the completed change-over.

Very clean and compact. The spring-wound timer switches are on the forward ER bulkhead.

With this setup my on-engine "last chance" filter should basically never need to be disturbed, and injector damage due to gunk in the fuel should be basically a non-worry as well, since this filter system is rated for the much-tighter-tolerance Cummins common-rail systems.

Ripping out the dual Racor 1000s and replacing them with this ended up costing me about $300 net-net and a full day's work, after I sold the Racors for $100 each. The pumps were $100 each and the fittings were non-trivial, as I used quite a few of them to get the options (polish/prime/etc) - without that you wouldn't need all that brass, but on the other hand you can't beat the utility of being able to polish your fuel any time, transfer between tanks, and re-prime in the event you need to for some reason, whether its due to running out of fuel or just after maintenance. The valves were all re-used from the old system which saved me some money, and with the exception of the polishing pump and the feedhose from the stock copper pipe to the inlet of the first filter all the hoses were able to be re-used as well - the lengths worked out fine.

Water checks are a matter of sticking a cup under the drains on the bottom of the filters and cracking the valves - 10 seconds max. The first element is a high-capacity 30 micron bulk separator and the second is the Fleetguard FS1000 elementl; both have drain petcocks on the bottom. Neither will pass water. The restriction gauges are right "in your face" as well which makes underway checks trivial.

One thing I noted immediately is that the old Racor system would exhibit quite a bit of "jumpiness" in the restriction while underway, indicating possible bypass of the element and/or stuck valving components in the system (e.g. the "ball" in the RACOR). This system does not do that - at all. Fuel delivery is smooth at all RPMs.

 

[Traveler 45C]

I’m gonna’ want to do this after I use up all of the Racor filters that I have. I’ve got a bunch that I bought from the BoatDiesel Store. Good prices; too bad they shut down.

Your system looks sweet. But what are those funny looking blue things at the bottom of the picture?

 

[Genesis]

Bite me

 

[Traveler 45C]

Rofl!!!

Greg

 

[solanderi]

Hi Karl,

I have recently purchased the Tony Athens fuel filter set-up that you put on Gig and it looks slick. The question I have is about the vacuum gauges. Did you consider the type that have a max vacuum indicator needle like a depth gauge that you can reset before each run ? Does the gauge sense increased vacuum at increased rpm's ? Thank you,

Also, to convert the "Last Chance" secondary fuel filter on the 692's is that a DD part # and which canister should I use. Is that a Fleetguard too?

Thank you

Greg

 

[klebel]

I am going to dredge up this old thread. This is awesome. I have 671's in my boat with 3 fuel tanks. Genesis is there any way to get a drawing of this setup? I was searching the Net looking for ideas and found this. It is exactly what I want to do with my boat. Is it still working for you? Anything you would change? What filter setup is that? What are the flow specs on those pumps? I have lots of questions.

 

[stormchaser]

Didn't somebody post an DD oem part in another thread that sprayed starting fluid or ether into the intake to help with cold starts? How would that be any better for the engine than using it to help prime? I know ether is really bad for 4-cycle diesels...but I thought I read here that it was not terrible for 2-cycles? Or am I imagining things?

 

[Genesis]

I am going to dredge up this old thread. This is awesome. I have 671's in my boat with 3 fuel tanks. Genesis is there any way to get a drawing of this setup? I was searching the Net looking for ideas and found this. It is exactly what I want to do with my boat. Is it still working for you? Anything you would change? What filter setup is that? What are the flow specs on those pumps? I have lots of questions.

There was a full write-up on it posted to BoatDiesel; you can find it here: http://www.denninger.net/filters/out-with-the-old.htm

 

[ron6785]

One of the things using ether or starting fluid may do is damage the rings, such as losing temper, which results in smoking engines.

 

[Traveler 45C]

One of the things using ether or starting fluid may do is damage the rings, such as losing temper, which results in smoking engines.

Not only that, you could cause damage to the injectors as there is no fuel flowing to them to cool them while the cylinders are firing.