Fuel system
71
Required minimum copper pipe diameters, see table
below.
Copper piping
The figure shows a transition from flexible fuel hoses
(1) to copper pipe (2). Thread M18x1.5.
∅ 3/8"
∅ 3/8" (2)
M18x1,5-6H
1
1
Outer ∅
Priming pump for D5/D7
D5/D7 has no engine mounted priming pump. To be
able to vent the fuel system, if the tank is located be-
low the engine, a prime pump must be installed on a
bulkhead or similar between fuel tank and prefilter.
NOTE! It's important to install the pump with the ar-
row upwards according to the picture below.
<6 m (20') >6 m (20')
D5/D7 14 mm 16 mm
D9/D11/D12/D16 10 mm (3/8") 12 mm (1/2")
From tank to fuel line connection point
D5/D7 12 mm (1/2") 12 mm (1/2")
D9/D11/D12/D16 10 mm (3/8") 10 mm (3/8")
Fuel return line dimensions
Clamp the fuel line. Distance between clamps should
be approx. 300 mm (12").
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