SailNet Community - View Single Post - Return diesel fuel to the tank?
View Single Post
Old 03-21-2013
casey1999's Avatar
casey1999 casey1999 is offline
Senior Member
Join Date: Oct 2010
Location: HI
Posts: 3,194
Thanks: 16
Thanked 40 Times in 39 Posts
Rep Power: 5
casey1999 is on a distinguished road
Re: Return diesel fuel to the tank?

Many of the small Hp Yanmars have the fuel return line connected at the top of each fuel injector. The lines are run together then connect to a hose that takes fuel back to fuel tank. I guess you could connect the line to the fuel intak, but because this fuel return line may have air in it, that could cause a problem by air locking your fuel system. I do not seem to get any fuel returned to the tank through this line at idle (have not checked at full throttle), but the engine runs fine.

I do not understand how the injector works. Is it the fuel pressure that causes the injector nozzel to spray fuel? Why do you need a fuel return. Does not the fuel injector pump meter correct fuel to the injector? I can see where the fuel mechanical pump (or electric if that is what you have) could push too much fuel, but with a diesel, I would think the fuel would be restricted by the positive displacement fuel injection pump.
Reply With Quote Share with Facebook