[C320-list] Yanmar starting problem

[Chris Burti]

Bob,
The "crush" washer in the upper bleed screw port, just before the injectors
is made using a nickle alloy that is intended to be soft enough to form a
seal when tightened. If it is over-tightened or if it has been replaced
with a stainless steel washer, it can cause the symptoms that you describe.
It is cheap enough to try replacing it before pulling the injectors.

Fair winds,
Chris Burti,
Commitment, #867
Washington, NC

Chris Burti
Farmville, NC


On Mon, May 23, 2016 at 3:07 PM, Robert Dean <robrtdean at yahoo.com> wrote:

> I have hull 550, it's a 1998 with a Yanmar 3GM30. Last fall it became hard
> to start after it sat for a few days. Once it started it ran a little rough
> for a minute or two than ran fine. After it ran it would start with just
> the touch of the starter button.If it sat for a few hours it would still
> start right up. It is getting air in the fuel lines some how.Over the
> winter I did away with the check valve on the fuel line at the injector
> pump per Yanmar service advisory 11-1-2000.  I replaced the Racor filter
> element and gaskets and the Yanmar filter element and o-ring. I replaced
> the fuel hose from the tank to the Racor  and from Racor to the lift pump,I
> also replaced the line that goes around the dipstick. I replace all the
> copper seals.Everything is new from the fuel tank to injector pump,but I
> still have the same problem. I had a mechanic look at it,he couldn't find
> any leaks. The mechanic did say it might be an injector leaking. Before I
> go to the expense of replacing injectors, I thought  I would ask if anyone
> else had this problem.
> Bob DeanJust Chillin 550Worton Creek
>