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see the water that’s accumulated in the filter
over time. Filters with a plastic sightbowl
must be mounted outside of the engine
space to meet ABYC standards.
FUel lineS: TiMe For
While you’re buying, consider replacing your
fuel lines. If they’re older than 2009, they
should be replaced. New fuel line has a
tough inner liner that’s more resistant to
alcohol damage. The older line had no such
inner wall, and the alcohol would literally disintegrate the line from the inside out.
Chunks and globs of the inner wall can end
plan The inSTalla Tion
up in the engine’s fuel canister and injec-
tors, causing running problems and possible
engine failure. If this happens, you’ll have lit-
tle choice but to pay for a costly injector and
fuel system cleaning. Be prepared for some
sticker shock if you do replace your hoses;
the new EPA-approved line costs about four
times more per foot than the older line.
Placement should be considered first. The
filter should be installed in the outlet line
that delivers fuel to the engine, after the tank
outlet fitting but before any fuel pumps,
regulators, primers or primer bulbs, or other
filters. You’ll need to access the canister filter,
quite possibly with a filter removal wrench
(same as an oil filter removal wrench, available at most auto parts stores) if someone
installs the filter too tightly.
Select a location high in the bilge so
the assembly never goes underwater. Lastly,
consider the hose routing; you want the inlet
and outlet hoses to enter and exit smoothly,
with no tight radiuses to potentially kink
them and cause a fuel restriction. No more
than a six-inch radius bend is recommended
for rubber-compound fuel lines.
The best place to secure the filter housing
is on a bulkhead that allows you to reach
both sides. This way you can through-bolt
the housing and keep it tight so it won’t
vibrate loose. Coat the drilled holes with
epoxy resin to keep the wood bulkhead from
rotting over time. Use stainless hardware
with large flat washers to spread the load,
and Nylock nuts so they won’t vibrate loose.
Two bolts will secure the housing. The hose
fitting threads should be coated with pipe
thread sealant (available at hardware and
auto parts stores) and tightened carefully;
remember, the filter housing is aluminum so
new alcohol-resistant fuel line
is clearly labeled as shown here.
note stainless hose clamp,
here’s a clean installation
showing a 90-degree elbow in-
let and outlet used to keep fuel
lines routed downward away
from the bulkhead and filter.