Re: [Amel Yacht Owners] GENSET ONAN CUMMINS cannot restart after fuel filter and oil change
Alexandre Uster von Baar
Good morning Bill (SM #160),
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April 28, 2015 in reply to Mike Ondra’s post, I reply: my injectors (engine) were removed to be check/rebuilt Somehow fuel was still coming drop by drop in the bilge compartment. It did not make any sense to me as the valve was off. I realize the fuel was coming from the “return” valve (which still doesn’t make any sense… may be some type of suction or syphon?) So I disconnected the return rubber fuel line to the tank, the leak stop. My tank was may be 1/2 full. It happened to other people as well. One of these things hard to understand but that you have to keep in mind. Sincerely, Alexandre SM2K #289 NIKIMAT Club Nautico de San Juan, Puerto Rico --------------------------------------------
On Wed, 6/15/16, Bill Kinney greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:
Subject: Re: Re: [Amel Yacht Owners] GENSET ONAN CUMMINS cannot restart after fuel filter and oil change To: amelyachtowners@... Date: Wednesday, June 15, 2016, 9:21 PM I am puzzled… How can the fuel “syphon” back from the tank through the return line? Amel’s drawing of the tank does not show a dip tube (and there certainly shouldn’t be one!) on the return fitting on the top of the tank. It seems that if the only way this could happen is if the tank is filled so full the level is up into the fill line with NO air in the tank at all. Bill KinneySM#160 HarmoniePort Canaveral, Florida On Jun 15, 2016, at 21:41, amelliahona <no_reply@...> wrote: Dominique: I just replaced my electric priming pump on my SM #335 Onan Genset. I did not have access at the time to a proper FLARE NUT WRENCH when I did this. I ended up distorting the "B-nut" on the small copper fuel line that goes from the fuel pump to the fuel filter adapter and could NOT get a proper seal upon replacing this line (a continuous small seep of fuel that was really annoying and messy). I had to order a replacement line (not that expensive) and buy a proper set of flare nut wrenches to adequately get a seal. I wish I could remember the size of the flare nut but it was SAE (not metric) sized. Make sure the fuel tank is low on fuel (think 250 liter will work) otherwise a continuous stream of fuel will flow by syphon from the fuel tank fuel return line while you make this plumbing change. I managed to turn this otherwise simple replacement into a major project based on A) not using the proper tools to loosen and re-install the B-nut of the fuel line, B) not have lowered the fuel in the tank (mine was full at the time of my work). Good luck. The pump was about $65 as I recall (not that expensive in the scheme of things) and the fuel line was about $8 Sincerely, Gary S. 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