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FUEL SYSTEM
FUEL SYSTEM REQUIREMENTS
7
FUEL SYSTEM
REQUIREMENTS
Regulations and Guidelines
Vessel man ufacturer, and /or inst aller of an EP A
certified outboard, must meet minimum specifica-
tions for boat fuel systems established by:
• U.S. Environmental Protection Agency (EPA)
– 40 CFR 1045.112
– 40 CFR 1060
• U.S. Coast Guard (USCG)
– 33 CFR 183
• American Boat & Yacht Council (ABYC)
– Standard H-24
– Standard H-25.
Portable Fuel Tanks
Do not use port able fuel tanks for
outboards larger than 1 15 HP. Inadequate fuel
flow to hig h horsepower outboa rds can res ult
in serious powerhead damage.
Fuel Flow Requirements
A WARNING
If engine is equi pped with a quick -discon-
nect fuel hose, you MUST disc onnect the
fuel hose from the engine and the fuel tank
to prevent fuel leaks:
• Whenever the engine is NOT being used
• Whenever the engine is being trailered
• Whenever the engine is in storage.
NOTE: A small a mount o f fuel m ay be
released when the fuel connector is dison-
nected.
Store portable fuel tanks in well-ve ntilated
areas, awa y from hea t sources a nd open
flames. Close th e ve nt sc rew of the fuel
tank cap, if equipped, to prevent escape of
fuel or fuel v apors which c ould ac ciden-
tally ignite. Do not a llow disconnected fuel
hoses to leak fuel.
15 – 30 HP 40 – 90 HP 115 – 300 HP
Fuel tank pickup tube 1/4 in. (6.4 mm) min. ID 5/16 in. (7.9 mm) min. ID 3/8 in. (9.5 mm) min. ID
Fuel fittings 5/32 in. (4.1 mm) min. ID 1/4 in. (6.4 mm) min. ID 9/32 in. (7.1 mm) min. ID
Fuel supply hoses 1/4 in. (6.4 mm) min. ID 3/8 in. (9.5 mm) min. ID 3/8 in. (9.5 mm) min. ID
ALL MODELS
Fuel tank pickup
screen
100 mesh, 304 grade stainless steel wire, 0.0045 in. wire diameter, 1 in. (25
mm) long
Antisiphon valve 2.5 in. (63.5 mm) Hg maximum pressure drop at 20 gph (76 l/hr) flow
Remote fuel filter 0.4 in. Hg maximum pressure drop at 20 gph (76 l/hr) flow,
150 in.
2
(1290 cm
2
) of filter area
Maximum fuel pump
lift height
Fuel pump should not be located more than 30 in. (76.2 cm) above bottom of
fuel tank
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