Re: T&T: T&T Fuel Priming Detroit Diesel
Comment: My personal experience with 53 series and 71 series, and numerous
statements from others over the years, is that DD are unusually GOOD at
reprime....I've posted on this previously.
However, as posted on the Hatteras website, the secondary fuel filter
(engine
mounted filter) must be refilled manually or it takes forever to get an
engine start...
Rob Brueckner
Hatteras Yachtfisherman
Hello Rob I put a T fitting in the return line before the orifice and use
it to hook up a hand operated vacuum type oil change pump with the system
completely dry it will draw fuel thru very quickly and the oil pump
collects the
fuel in it's own canister. So no fuss no spilled fuel no filling filters
quick and easy.
Brian Palmetto FL
Hello All well I commenting on my own post (how strange) Another listee
contacted me of line and suggested that on twin screw boats adding a T in the
discharge side of the lift pump on each engine and adding a crossover line with
a valve on one side would allow the running engine to purge and fill the non
running engine. What a good idea much better than my method. I think with
the high capacity of the DD lift pump you could probably run both engines on
one pump at reduced load so in addition to a no hassle priming system you would
also have some extra redundancy in the event of a fuel related failure. The
poster never put it on the list. For DD owners and probably some others like
Cat with very high capacity lift pumps it's such a good idea I thought it
should be shared. Does anyone see a down side?
Brian Palmetto FL
a few months ago i had a problem on the port 8V71N, fired up fine but lost
prime... i coudln't reprime it (broken hand pump)... i had a 45 minute run
to get home and dind't want to come in on 1 engine (not that easy to back
into the slip on one engine...) so i fed the port engine using the genset
electric lift pump. i ran a piece of hose from the pump outlet (pulling
fuel thru the genset pick up and primary,) to the DD primary outlet (and on
to the pump and secondary)
worked fine... fired up instantly, i took it easy at around 1100 rpm to
make sure some fuel would still be returned to the tank, on these DDs ithink
excess fuel is used to cool the injectors.
next day i changed the filters, checked for air leak and all was fine. i
now keep a spare electric fuel pump on board...
pascal
miami, fl
70 hatteras 53 my
----- Original Message -----
What a good idea much better than my method. I think with
the high capacity of the DD lift pump you could probably run both engines
on
one pump at reduced load so in addition to a no hassle priming system you
would
also have some extra redundancy in the event of a fuel related failure.
The
poster never put it on the list. For DD owners and probably some others
like
Cat with very high capacity lift pumps it's such a good idea I thought it
should be shared. Does anyone see a down side?
Brian Palmetto FL
a few months ago i had a problem on the port 8V71N, fired up fine but lost
prime... i coudln't reprime it (broken hand pump)... i had a 45 minute run
to get home and dind't want to come in on 1 engine (not that easy to back
into the slip on one engine...) so i fed the port engine using the genset
electric lift pump. i ran a piece of hose from the pump outlet (pulling
fuel thru the genset pick up and primary,) to the DD primary outlet (and on
to the pump and secondary)
worked fine... fired up instantly, i took it easy at around 1100 rpm to
make sure some fuel would still be returned to the tank, on these DDs ithink
excess fuel is used to cool the injectors.
next day i changed the filters, checked for air leak and all was fine. i
now keep a spare electric fuel pump on board...
pascal
miami, fl
70 hatteras 53 my
----- Original Message -----
What a good idea much better than my method. I think with
the high capacity of the DD lift pump you could probably run both engines
on
one pump at reduced load so in addition to a no hassle priming system you
would
also have some extra redundancy in the event of a fuel related failure.
The
poster never put it on the list. For DD owners and probably some others
like
Cat with very high capacity lift pumps it's such a good idea I thought it
should be shared. Does anyone see a down side?
Brian Palmetto FL