Odd fuel leak: Need a diagnostic clue

Ralph Johnstone

Ralph Johnstone

.
Jan 4, 2006
7,443
Hunter 310 West Vancouver, B.C.
WayneH said:
You can not see superheated steam even on muggy days but when the end of the broom handle DISAPPEARED you knew you had found the leak.
Click to expand
Always wondered why these steam plants had such short brooms everywhere you looked.

1690733737268.png



WayneH said:
Hopefully, detection methods has improved since I retired.
Click to expand
Nah, same old method by the time I left as well.
 
Last edited:
jaysweet

jaysweet

.
Jun 25, 2004
522
Hunter 306 Pasadena MD
It sounds like you've found the problem, but I'll just comment that I had a leak in my 306 fuel system in May 2022 that was from the primary fuel filter, which sits pretty close to the picture of the fuel puddle you posted: underneath the stuffing box, just aft of the transmission. I think our boats are near relatives. My leak wasn't as drastic as yours, and mine prevented the engine from starting (i.e., the engine was sucking air), so it's probably not the same thing, but... for what it's worth, here's the link to my problem:

Yanmar fuel problem: air leak?

Two days ago, I ran the engine (Yanmar 2GM20F) on dry land to test it before today's launch date. I mean: I ran the heck out of it. Usually, I just do one bucket of water-worth, but this time, I had a garden hose going into the bucket, so I did maybe 3 buckets worth (say 3-4 minutes). It started...
forums.sailboatowners.com

Good luck with yours.
 
matts997

matts997

.
May 15, 2015
144
Marlow-Hunter 31 Everett, WA
The culprit has likely been found by one of the installer‘s mechanics. A hairline crack in the hose that goes from the secondary filter to the injector pump, marked by the red arrow below. The hose has been ordered and will be installed Friday. Hopefully this ends the problem!

I learned a lot from all of this, especially the discussion here.

Jay, thanks for that link.


IMG_2664.jpeg
 
  • Like
Likes: ggrizzard
jibes138

jibes138

.
Jan 27, 2008
3,092
ODay 35 Beaufort, NC
I had a fuel leak once and eventually traced it to a hose that also cracked like yours. Replacement interval for fuel hoses is recommended at ten years. If yours are older replace them all. Fuel hose is available at auto parts stores and fairly inexpensive.
 
You must log in or register to reply here.

Top Bottom