M:\Product Information\366-348\Instructions\366-348 MGB Fuel Injection Installation Instructions_Grant_2.doc
Installation Part 21 – Connecting the Fuel return Hose in the Trunk
366-348 Inst Fig 192
366-348 Inst Fig 190
190.1
192.1
190.2
192.2
In early 1978, the filler neck hose used on the late MGB went
from a BHH1886, a sharply bent, nearly 90-degree hose (Fig
190) to a BHH206 hose that was not so sharply bent (Fig 192).
In the early version, the section of hose from the filler cap was
nearly horizontal (190.1). On the later cars, the same section
of hose angles downward (192.1). Where the hose connects to
the tank, the early version has a long section of straight hose
(190.2). The same section of hose on the later cars is much
shorter (192.2) We found it very difficult to install the fuel return
adapter in the later hose because there is just not enough
straight hose where it connects to the fuel tank. We therefore
include a 2 1/2” long piece of 2 ¼” ID filler hose in the kit for
use on the later cars.
366-348 Inst Fig 194
249.
Using a tape or a ruler, measure the length of the
straight section of hose where it comes up from the floor
of the trunk. (190.2, 192.2) If the straight section is over
3”, you have an
early hose
. If it is less than 3”, you have
the
late hose
and you will need to find the 2 1/2” long
piece of 2 ¼” ID filler hose supplied in the kit. Loosen the
hose clamps on the fuel filler hose and remove the hose.
250.
Early hose
: mark the hose 2 1/2” up from the end
that connects to the tank inlet. Cut the hose using a
single edge razor blade, knife, or large hose cutter.
Reinstall the 2 1/2” piece of the fuel filler neck hose on
the tank inlet. (Fig 194)
366-348 Inst Fig 196
196.2
196.1
251.
Late hose
: install the 2 ½” long section of fuel filler
hose included in the kit.
252.
Fit and tighten the factory hose clamp, securing the
2 ½” long section of hose to the fuel tank inlet. (Fig 194)
253.
Hold the fuel return adapter (196.1) so that the long
tube (196.2) points down.
254.
Slide one of the large band-type clamps (197.1)
supplied in the kit over the end of the filler hose attached
to the tank inlet (197.1).
366-348 Inst Fig 197
197.1
197.2
197.3
255.
Install the fuel return adapter (197.2) with the nipple
(197.3) pointing towards the hole in the trunk where the
fuel return hose enters the trunk.
256.
Tighten the band-type hose clamp
(197.1) to secure the hose to the
adapter.
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