Fuel Delivery System
90-863758060 AUGUST 2006 Page 5A-9
Description Where Used Part Number
Loctite 565 PST
Fuel line connectors male pipe
threads
Obtain locally
• Thread the brass fitting into the fuel filter base until finger tight, then turn the fitting an
additional 1¾ to 2¼ turns with a wrench. Do not overtighten or use an air impact wrench.
ALL MODELS
• To prevent overtightening when installing the fuel line, hold the brass fitting with a
suitable wrench to prevent it from turning when the fuel line connectors are being
tightened.
Cool Fuel Insulator Covers
MPI tow sports models are equipped with Mercury MerCruiser's exclusive cool fuel system
for added resistance to vapor locking. On tow sports models, this includes insulator covers
on the water separating fuel filter, which act as a barrier to heat transfer during a heat soak
condition (engine shut off after a hard run). These covers must remain in place to derive
full benefits of the system. Vapor lock problems that result from the removal of these covers
are not the responsibility of Mercury MerCruiser. A space should be provided for the
removal of the lower cover to allow servicing of the filter.
The fuel pump assembly is mounted low on the engine for optimum cooling and
performance. While servicing of the pump is seldom required, clearance in the front of the
engine should be provided to allow access.
a
b
14931
Water separating fuel filter
a - Water‑separating fuel filter cover
(MPI tow sports models only)
b - Water‑separating fuel filter
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