Fuel return line on Lehman 135SP
- Thread starter mike66
- Start date
The friendliest place on the web for anyone who enjoys boating.
If you have answers, please help by responding to the unanswered posts.
If you have answers, please help by responding to the unanswered posts.
Airstream345
Guru
- Joined
- Jul 3, 2017
- Messages
- 1,015
- Location
- United States
- Vessel Name
- FORTITUDE
- Vessel Make
- Kadey Krogen 54-8
Mike what are you trying to accomplish? My sense is that you wouldn’t want any back pressure on the return line.
Ski in NC
Technical Guru
Go back to the tank. Part of the purpose of the return is to get rid of any air that might get into supply, route return to supply and air will have no where to go.
Also some engines use the return to take some heat away from inj system.
Also some engines use the return to take some heat away from inj system.
OP
OP
mike66
Guru
I'm re-plumbing due to a fuel tank leak, and the present return line goes into a T with the generator supply line, which comes off the good tank. I need to tap off the same supply line to get fuel to the Lehman, since the present supply line for it comes off the leaking tank. Both tanks interconnect at the bottom to keep the boat trimmed, but luckily have shut-offs so I can isolate the tanks.
I'll just return to the tank to be on the safe side.
Thanks.
I'll just return to the tank to be on the safe side.
Thanks.
kchace
Guru
- Joined
- Sep 29, 2013
- Messages
- 2,266
- Location
- USA
- Vessel Name
- Shalloway
- Vessel Make
- Defever 44, twin Perkins
This is especially true for an engine like the FL135 which has an "auto bleeding" injection pump (which BTW works really well). That air has to go someplace and it shouldn't be sent back to the input. There are 2 return lines, one from the injection pump and one from the injectors. They typically T together and then should go back to the tank.
Ken
