Cool Fuel 2 Fuel Pressure Regulator Install Question

[jgoedd99]

Installing a new Cool Fuel 2 FPR in my 1998 370 DA with 454 MAG MPI Horizon Engines (S/N 0L006007). Merc Part Number 860349A1. The FPR does not come with the gas line connector, and that is a separate part (Merc Part Number 22-808002A1). This part looks to be a 1/16" MPT pipe nipple by 45 degree Female flare fitting. The connector includes a copper washer that goes between the fitting and the FPR. I assumed that similar to a brake line when you have a copper washer you torque it down pretty good. But I just broke the fitting doing so. I used Perfect Seal on the 1/16" MPT thread and i am uncertain what purpose the copper washer serves especially if you cannot torque it that tight. Note Merc Service Manual 23 completely skips this step.

I was able to extract the broken pipe nipple, and got a new fitting ordered, but thought i would see if anyone can give me some advice as i am uncertain how to install this fitting on the FPR.

Attached photo is Cool Fuel 2 with FPR attached. The broken fitting including extracted 1/16" nipple and copper washer are in photo.

Thanks for any help

 

[jgoedd99]

I will answer my own question. Struggling with fixing this, i purchased an OEM fuel pressure regulator instead of the aftermarket unit i was having the issue with. Turns out the fuel line connector screws in smoothly and bottoms out as it should, allowing the copper washer to do its job. Still haven't figured out the issue but making progress.

 

[West32]

I just broke mine too.... Did you find an alternative?

 

[ttmott]

That wouldn't be NPT (tapered) threads. If there is a copper crush washer then the threads are SAE/AN straight.
The fitting that goes into the FPR cannot be a 45 or 90 and be a straight thread with crush washer; you'd never be able to adjust the direction the fitting points.
There is a chance, but I doubt it, that the FPR threads are metric like a M10X1.0. In this case you will need an adapter which are available from Summit Racing and JEGS.