[C320-list] Yanmar 3GM issues

[Allan Field]

Louis - Is the loose nut you are describing on the secondary fuel filter
the bleed screw? If so, there is a copper "crush washer" between the bleed
screw and the top of the housing that should be changed out periodically as
it will crush down and eventually leak. I change it prophylactically after
each filter change, just to be safe. Sometimes it's not a loose nut but
rather a crushed crush washer!

Allan S. Field
Sea Shadow - C387, #103 (formerly C320)
Columbia, MD & Herrington Harbour South



On Tue, Jul 16, 2024 at 8:43 AM Louis Friedman via C320-list <
c320-list at lists.catalina320.com> wrote:

> thanks all.  I recruited someone more experienced than me at out club(not
> hard to do!) and it turned out to be a loose nut at the point the fuel hose
> enters the secondary fuel filter.  Seems to be running good now but I need
> to clean up a pile of diesel fuel today!
>
> Lou
>
> On Sun, Jul 14, 2024 at 9:20 PM Louis Friedman <loualfr at gmail.com> wrote:
>
> > thanks all. lots of good advice here.  I will take a look this  week. We
> > were heeling a bit today so I wonder if some crud did get in the fuel
> line.
> >
> > Lou
> >
> > On Sun, Jul 14, 2024 at 6:33 PM Bob Borelli via C320-list <
> > c320-list at lists.catalina320.com> wrote:
> >
> >> When I have trouble starting my M30 engine,
> >> And need to continuous turning over hoping to start
> >> I remove the drain plug on the Aqua Filter (9/16" wrench)
> >> So I can turn the engine over at 30 second or more intervals
> >> with no worry about back filling the exhaust hose, elbow, exhaust
> manifold
> >> which would be a very serious error!
> >> Easy to pump water out of the bilge & return drain plug to Aqua Filter.
> >> When lucky enough to have solved hard to non start problem.
> >> To date my problems have been air leaks & a brand new dirty primary
> >> filter from debris stirred up from bottom of tank.
> >> I've have had a work request to polish the fuel with hope to get the
> >> bottom debris out of the tank.
> >> And I keep several spare primary & secondary filters onboard for the
> next
> >> unexpected time diesel fades or hard to start.
> >>
> >> I'm thinking of replacing the 3 injectors with new from Part4Engines
> >> instead of sending to shop for test and rebuild.
> >> M30 has  1650 engine hours.
> >>
> >> Bob  1995 C320 no. 209  moored on the Sassafras
> >> ________________________________
> >> From: C320-list <c320-list-bounces at lists.catalina320.com> on behalf of
> >> Jeff Smith via C320-list <c320-list at lists.catalina320.com>
> >> Sent: Sunday, July 14, 2024 6:11 PM
> >> To: C320-List at catalina320.com <C320-List at catalina320.com>
> >> Cc: Jeff Smith <svsailmates512 at gmail.com>
> >> Subject: Re: [C320-list] Yanmar 3GM issues
> >>
> >> How many hours on the engine? This is how many problems started on my
> >> Perkins with approx. 1,150 hours. After much troubleshooting, I had my
> >> injectors and injection pump rebuilt (not at the same time). That solve
> >> the
> >> issue.
> >>
> >> The advice the shop gave me was to start with a clean container of
> diesel
> >> and work backwards from the injection pump. It is probably with changing
> >> the two filters first (approx. $50), before you start taking fuel lines
> >> loose and plugging them into the clean tank of diesel. However, this
> >> method
> >> is how I diagnosed my issue.
> >>
> >> I also installed ann electric fuel pump. I simply turn it on after
> >> changing
> >> the filters. It usually eliminates the need to bleed the system, or it
> >> makes bleeding extremely easy.
> >>
> >> Good luck,
> >> Jeff
> >> #121
> >>
> >> On Sun, Jul 14, 2024 at 4:51 PM Louis Friedman via C320-list <
> >> c320-list at lists.catalina320.com> wrote:
> >>
> >> > Hi all, looking for thoughts here- went out for a sail today -engine
> >> took
> >> > a lot of priming to start but then was fine. After 2 hrs sailing it
> >> > wouldn’t turnover despite more priming. Had to sail it into the
> mooring.
> >> > Someone suggested  maybe a fuel line clog or I need to change the
> >> primary
> >> > fuel filter? Both fuel filters were changed upon launching in May-
> >> would it
> >> > make sense to change again ?  Picked up Nigel Calders book on diesels
> >> but
> >> > still learning.
> >> >
> >> > Lou
> >> > S/v Miss Adventure
> >> > #623
> >> > Sent from my iPhone
> >>
> >
> >
> > --
> > Louis Friedman, DO, FACP
> > Woodbridge Medical Associates
> > www.woodbridgemed.com
> > 732-634-0036
> >
> >
>
> --
> Louis Friedman, DO, FACP
> Woodbridge Medical Associates
> www.woodbridgemed.com
> 732-634-0036
>