Fuel return line ID and return back pressure

[Rangatira]

Can anyone say whether there is an issue with higher return pressure using the the 3.2mm id hose (1/8") versus the a 3.5mm id hose? For the injector return on a MEP803a.

 

[Guyfang]

Whats the problem? Its a low pressure system. Should not matter what size line you use. As long as it fits and is good quality.

 

[Rangatira]

There is no problem. Just replacing the lines on one of my units with 1/8" and started asking myself the question. I have had combustion issues on larger engines with very small restrictions in the return line in the past.

 

[Light in the Dark]

No issue at all. Just run some high quality 1/8" line and be done with it. I use Gates 27000 (readily available at O Reillys).

 

[jamawieb]

I use the same as Light in the Dark. Its very tight to get on but not problems in the years Ive been using it. Make sure its fuel rated.

 

[Light in the Dark]

Dab the end in the smallest amount of motor oil and it will help glide right on.