We've a Perkins
4-108 from the mid-'80s in our sailboat. We are looking to replumb the low pressure side of the fuel
system as the compression
fittings are failing.
One piece of information we've been unable to obtain has to do with the tubing/device joints.
On both connections to the lift pump
we have tubing with brass ferrules:
At the end of the tube from the lift pump
to the on-engine secondary fuel filter
we have this connection - a 'bubble' fashioned in the tubing and a length of rubber tube:
We think the connection to the secondary fuel filter
is of the same type as for the brass ferrule compression
fitting, and are thinking of using that when we remake the tube. It does seem that the rubber tube is the type of compression fitting used for the banjo nut/steel fuel
line joint on the rear of the secondary fuel filter.
- Does anybody know if we can use the straight tube/brass ferrule in place of the bubbled tube/rubber tube? If not, why the bubble?
- Any idea of where to source the rubber tubing?