[C320-list] Trouble starting Yanmar 3GM

[Jack Brennan]

Hi Louis:

Just don't ignore it for too long. Small problems can develop into big ones when you neglect them.

It sounds like you might be new to diesels. Don't get too intimidated about doing your own repairs. Everything I described can be done with a screwdriver and a wrench, with a hand drill for mounting a new Racor filter. The trickiest part is bleeding air from the line, which is not really tricky on a Yanmar.

A good way to prepare yourself is to buy Nigel Calder's book on diesel engines.

Jack Brennan
Sonas, 1998 Catalina 320
Tierra Verde, Fl.
________________________________
From: C320-list <c320-list-bounces at lists.catalina320.com> on behalf of Louis Friedman via C320-list <c320-list at lists.catalina320.com>
Sent: Sunday, July 7, 2024 6:52 PM
To: C320-List at catalina320.com <C320-List at catalina320.com>
Cc: Louis Friedman <loualfr at gmail.com>
Subject: Re: [C320-list] Trouble starting Yanmar 3GM

Jack,

That may be more than I have time or the ability to do, might have to wait
for fall to have the yard take another look.  thanks.
Dan - just to clarify, you open the throttle before you crank the engine?
and crank the engine with the throttle at 3/4 to half open?

On Sun, Jul 7, 2024 at 5:04 PM Daniel Kolean via C320-list <
c320-list at lists.catalina320.com> wrote:

> I had trouble cold starting too. Hull #498, same Yanmar. What works for me
> is slowly open the throttle, pull it down, then put it back up to 1/2 to
> 3/4 throttle, then crank and bring throttle down when it fires.
>
> Dan Kolean
> ENRICH #498
> Sent from my iPhone
>
> > On Jul 7, 2024, at 1:45 PM, r. scott via C320-list <
> c320-list at lists.catalina320.com> wrote:
> >
> > i had the exact same problem on hull 615. had a very slow leak on line
> to
> > fuel pump. one drop a week. racor pump primes   very well if fuel pump
> is
> > on wrong position on the cam
> >
> >> On Sun, Jul 7, 2024 at 1:17 PM Louis Friedman via C320-list <
> >> c320-list at lists.catalina320.com> wrote:
> >>
> >> Hi all,
> >>
> >> We have a 1999 320, previous owner had told me that the Yanmar when cold
> >> would not start unless it was primed with the manuel fuel pump. He had
> >> thought there might be a fuel leak.  I had our marina check it out(they
> are
> >> certified for Yanmar engines) - they could not find any leaks and
> thought
> >> it was fine. If the engine has been run within a day, it's fine. But
> more
> >> than that and it needs priming to get fuel in the line - any other
> thoughts
> >> on why this would be. Anyone have a similar issue?
> >>
> >> Lou Friedman
> >> s/v Miss Adventure
> >> Hull #623
> >>
>


--
Louis Friedman, DO, FACP
Woodbridge Medical Associates
www.woodbridgemed.com<http://www.woodbridgemed.com>
732-634-0036