[C320-list] Yanmar starting problem

[Rod Boer]

Hi Bruce,

I questioned the Yanmar representative at the Annapolis Boat Show last year regarding the 2 micron Racor filter and he said there shouldn't be any problem using it. I have also used it for at least 10 years and haven’t had any issues with it.

Rod Boer
Odyssey, #688

-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Bruce Hunter
Sent: Tuesday, May 24, 2016 7:13 PM
To: C320-List at Catalina320.com; Jeff Hare <Catalina at thehares.com>; C320-List at Catalina320.com
Subject: Re: [C320-list] Yanmar starting problem

Thanks Jeff,                      I didn't know if there were little hose clamps holding it in place. The valves sound like a great idea too. About the primary filter, I took a diesel class and was told a 2 micron filter on the primary put too much strain on the rubber diaphragm of the lift pump although my boat originally had that. I changed it out to a 10 micron filter this year...we are horribly off subject, my apologies.
Bruce Hunter Nauti Time #719

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  On Tue, May 24, 2016 at 10:55 AM, Jeff Hare<Catalina at thehares.com> wrote:   Bruce,

You should be able to replace the fuel line without removing the water tank.  The hoses can be pulled through in the direction from the Racor, back to the tank.  It could be harder to pull the other direction.  May need to take the rubber bushings out where the hose passes through the fiberglass so that the new hose can be fed in.

Good time to add shutoffs before & after the Racor like I did to simplify filter changes.  I also made the hose that exits the Racor angle downward as it leaves the filter to stop any bubbles from traveling up that line to the secondary engine mounted filter.

Can't comment on the hose diameter...

We have always run 2-micron filters in both the engine mounted filter and the Racor.  That way, the only reason the engine mounted filter should ever see much debris is from the bits that sneak through during the Racor filter, hose changes or small things that sneak past defects in the primary Racor.  Changing hoses, there is bound to be some dust/debris.

So, worst case, I'd run a 2u Racor and 5 or 10u engine mounted filter as a backup.  Makes engine mounted filter changes only rarely necessary as a general maint. item.  You should never have to change *both* filters under way with this technique.

Got off track a bit.
-Jeff Hare
#809


-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Bruce Hunter
Sent: Tuesday, May 24, 2016 9:36 AM
To: C320-List at Catalina320.com; Chris Burti <clburti at gmail.com>; 320 <C320-List at catalina320.com>
Subject: Re: [C320-list] Yanmar starting problem

Hey Bob...or anyone in the know:                When you replaced the fuel line from the tank to the Racor did you have to remove the aft water tank? My fuel line is starting to look a little ratty but I didn't want to dismantle half the boat this early in the season. Also I know I've read our boats have 3/8 fuel line but mine is actually 5/16's what's yours?
Thanks,Bruce Hunter Nauti Time #719

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  On Mon, May 23, 2016 at 3:30 PM, Chris Burti<clburti at gmail.com> wrote:  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
>