Dirty Fuel Or What ?

Feb 21, 2014
137
Hunter Passage 42 St Andrews Scotland
Hello everyone

This article will help Legend owners I am sure but, other boat/yacht owners as well. I purchased in July 2013 a 1995 Hunter Passage 42, she is a fantastic yacht and now called Casper. However, I have had continual fuel problems with the engine faltering and stopping after just an hour or so of use or, if there is a bit of a bumpy sea. I have changed the fuel filter 5-6 times in the past year and keep bleeding the water trap but the problem continued. While in Holland this summer I lifted the aft cabin bed and took the top off the fuel tank, I reached in and pulled up and out the fuel hose. The original rubber hose was flaking off around the outside to that of a gritty rubber substance. I split the pipe with a razor and found the inside strengthened with an spring running the length of the hose. The rubber inside the pipe was badly perished as well. I removed the entire pipe and took it outside where I went blue in the face trying to blow through it. When it cleared it had been blocked with rubber flakes/grit rubber crud. I have replaced the pipe and BINGO! I need never have changed all the filters I did. Consider the problem I had if you have the same symptoms with your engine.

Regards to you all from Scotland.
 
Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
And that is why you would want to use metal lines for the majority of the run from tank to engine with rubber hoses only used to connect the boat pipe to the engine proper. i think this is covered in the "best practices" section of boat plumbing in one of the regulations (ABYC???)
 

RichH

.
Feb 14, 2005
4,773
Tayana 37 cutter; I20/M20 SCOWS Worton Creek, MD
You'll find than many of the old standby rubber compounds used with #2 and diesel fuel oil for 'generations', such as BunaN and Neoprene, are becoming increasingly 'attacked' and softened by the newer blends of diesel fuel and especially those blends that contain 'bio-diesel' and especially 'bio-diesel' that is made from reclaimed cooking oils.

I now use much more expensive "viton" for my flex fuel lines.
 
Feb 21, 2014
137
Hunter Passage 42 St Andrews Scotland
Dirty Fuel or What

And that is why you would want to use metal lines for the majority of the run from tank to engine with rubber hoses only used to connect the boat pipe to the engine proper. i think this is covered in the "best practices" section of boat plumbing in one of the regulations (ABYC???)
Hello. Yes you are quite correct. I can only imagine the rubber hose inside the tank was fitted by the builder in 1995 and there are a many more Hunter Legends out there with potentially the same problem. Worth looking into if you have fuel problems

Have a nice day, Bill
 
Feb 21, 2014
137
Hunter Passage 42 St Andrews Scotland
Dirty Fuel or What

You'll find than many of the old standby rubber compounds used with #2 and diesel fuel oil for 'generations', such as BunaN and Neoprene, are becoming increasingly 'attacked' and softened by the newer blends of diesel fuel and especially those blends that contain 'bio-diesel' and especially 'bio-diesel' that is made from reclaimed cooking oils.

I now use much more expensive "viton" for my flex fuel lines.
Thank you for that reply. I actually fitted a new rubber pipe inside the tank as that was all I could get my hands on in Holland but, I will change it.

Regards to you, Bill