Hello -

A friend started the WVO conversion on my 1979 Merc 300td years ago. We were using a Frybrid kit purchased 12 years ago. He decided to stray from the original plans to have a looped return. I'm finally getting back to the project and spent a long time wiring up the microprocessor. I'm now getting into what I thought would be a simple task of rerouting a few hoses but the diagram he drew is illegible and I'm mystified. I was tempted to just go back to the original frybrid plan but have discovered that of course there is only one hose in hose going back to the in tank heat exchanger. The other hose is just running coolant.

I altered and attached the original Frybrid diagram to show what I currently have going on under my hood. I guess I'm committed to the looped return as I am in a very remote location with limited access to additional parts and I really don't want to pull out that coolant hose running back to the VO tank.

Thanks in advance for any advice.

Meredith

Fuel schematic .pdf