I would check the compression and the injectors. You can do simple injector tests by installing them upside down so they spray up. If the spray pattern isn't even and a fine cone then they need cleaned. You could clean them yourself. While you have them out you have a perfect opportunity to check the compression. Compression should match between cylinders +/-25ish and be ~400psi.
Inspect and clean the precombustion chambers below the injectors. Reassemble and see if it starts any better. If not I might consider getting the injectors pop tested. If air is getting into the system a strip of paper towel tied around culprit fittings will provide proof in short order. Then again a back leakage of the various check valves would be kept internal and be very difficult to troubleshoot. You could just go sailing... Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Oct 5, 2016 9:19 PM, "Michael Jones via CnC-List" <cnc-list@cnc-list.com> wrote: > Hello experts, > > I wonder if you can help me with any suggestions. I have a C&C34 with a > 3GM30 F. This motor runs well and smoothly, water circulates, no smoke. > Recently it has been taking more and more revolutions to get it started. > When it is turning over there does not appear to be anything going on, but > when it starts its immediately smooth and normal (no coughing and > spluttering). > > This leads me to think that there must be a leak in the fuel system which > is allowing the fuel to drain back out of the injectors. The fact that it > seems to start with all 3 cylinders suggests that the leak is before the > injector pump. > > I cannot see any fuel leaking out at the supply pump or filter, so I'm > wondering if anyone can suggest where I should start looking? Or what might > cause this and not show fuel leaking or spraying out? I'd like to introduce > some method into my troubleshooting! > > Thanks and regards > > Mike Jones > c&C34 Seanachai > Oak Bay, Victoria. > > > > On Sep 25, 2016, at 6:09 AM, Dave S via CnC-List <cnc-list@cnc-list.com> > wrote: > > Good morning all. Several weeks back there was a discussion surrounding > issues with bulging keel castings in colder climates. Been meaning to > post some photos I took awhile back, here they are: > > > http://cncwindstar.blogspot.ca/ > > > Dave 33-2 Windstar > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! > >
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