Re: Yanmar no start.
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Thanks all for the helpful tips which also provides great emotional support :-) Nothing like a hick-up with your main engine out at anchor to get a little anxiety up.
All appears good now.
I changed both racor filters which had both been used since last changed. The in-use racor had noticably more dirt on it. I also changed the fuel filters on both the Yanmar and Onan as they were right at a year since last change and the Yanmar had over 400 hrs due to above normal use on the long haul from the Caribbean to Chesapeake Bay in May and back after hurricane season this November.
Both engines started and ran fine.
I can suspect that a lot of extra motoring/motor-sailing, often when beating to the windward could have contributed to added gunk load on the fuel filters. Also, in the last couple months we have had six rollicking reaches back and forth between Antigua and Barbuda with only about 200 liters sloshing around in the fuel tank. They were all sailing except the final 45 min to an hour using stirred up fuel to get into the anchorage. And the we just refueled last week as well, immediately motor-sailing for over a hour around to our anchorage. Plenty of reasons to stir up the tank and add load to the fuel filters.
A few additional points:
- there were no issues with the Onan (but now with the LiFePo batteries it only had 100 hours over the last year and I'm sure that will go down more with my added solar capacity)
- no signs of water in the Racor bowls, or fuel drained from either the Yanmar or Onan fuel filters.
- Fuel filters are Racor, Yanmar and Onan OEM parts.
- last month when I was down to about 180 liters in the tank, I opened the rear tank inspection port and could clearly see to the bottom of the tank and it was clean stainless steel. Could still be a little gunk in the corners or far forward.
- I have been using Howes fuel treatment the last due refuelings, as well as a Valvetech biocide since Cartegena in Jan of 2020 (due to concerns with the hot humid environments we we're sailing in and also concerns about potentially having to purchase fuel with some bio-diesel in it)
- changing the Yanmar fuel filter is one of my less favorite maintenance tasks. Yes it's pretty straight forward and thanks for Bill Rouse simple instructions, but it's always a bit messy and I don't like the smell of diesel in the engine room.
- right now I'm chalking it up to restricted fuel flow due to dirty filters, but I guess that I was surprised to see it show up suddenly at idle.
Fair winds to all,
Daniel and Lori Carlson on sv BeBe, SM #387, currently in Antigua