[C320-list] Yanmar 3GM issues

[Doug Treff]

These are great boats. Once you get through these maintenance issues, you'll love it. Mine is a 1996 and I have very few problems.

I suspect there may be a leak somewhere (maybe the bleed screw) that allows air in the lines. My engine starts very fast. Your symptom definitely points to a fuel delivery issue of some kind.

--
Doug Treff
doug at treff.us


On Tue, Jul 30, 2024, at 11:25 AM, Louis Friedman wrote:
> Thanks for the tip Doug. I did use those oil sorb pads, worked quite well. The engine stars better now but I find I still need to pump the butterfly pump about 40 times to get it going. there must be another leak of some kind somewhere. At this point I'm dealing with a steering issue though so I'll get back to the engine later.  thinking now I should have bought a newer boat!
> 
> On Tue, Jul 30, 2024 at 10:52 AM Doug Treff <doug at treff.us> wrote:
>> Lou,
>> 
>> I had a similar problem when I bought my boat. Turns out the filter housing is aluminum and the bleed bolt is SS. At some point, a previous owner or mechanic overtightened the bolt and damaged the threads in the filter housing. Ultimately, I had to replace the housing. Was not the cheapest repair, but it did the trick.
>> 
>> And as others have mentioned, the copper crush washers do occasionally need to be replaced after several bleeding procedures. I keep a supply of them on board and every couple of years when I change filters and bleed the system, I'll replace the ones I disturb with fresh ones. They don't randomly start leaking - it's usually when they are loosened and tightened again (disturbed) that they start to leak.
>> 
>> As for cleanup, get some of the oil-zorb pads and put them in your bilge to soak up the diesel. I have found that simple green is a great cleanup solution for oil and diesel after you've discarded the soaked oil-zorb pads.
>> 
>> --
>> Doug Treff
>> doug at treff.us
>> 
>> On Tue, Jul 16, 2024, at 8:42 AM, Louis Friedman via C320-list 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
> 
> 
> --
> Louis Friedman, DO, FACP
> Woodbridge Medical Associates
> www.woodbridgemed.com
> 732-634-0036
> 
> 
>