21
BOAT RIGGING
FUEL SYSTEM REQUIREMENTS
1
Fuel System Primer
Outboards require a priming system to refill the
fuel system after periods of non-use. The most
common priming system is a primer bulb in the
fuel supply hose.
Install the primer bulb as follows:
• The primer bulb must meet the same Fuel Flow
Requirements as the fuel hose.
• The primer bulb should be easily accessible.
• The arrow on the primer bulb must point in the
direction of fuel flow.
• The fuel supply hose must allow the primer bulb
to be held with the arrow pointing up during
priming.
An alternative to a primer bulb is a U.S. Coast
Guard approved marine primer pump. Electric
primer pumps offer the convenience of outboard
priming from a dash-mounted momentary switch.
Fuel Filters
Boat-mounted fuel filters and water-separating
fuel filter assemblies must meet the required fuel
flow and filter specification. Refer to Fuel Flow
Requirements.
The filter must be mounted to a rigid surface
above the full level of the fuel tank and accessible
for servicing.
Fuel Filter Assembly, P/N 174176, meets all
requirements for a water-separating fuel filter.
Avoid using in-line fuel filters exter-
nal to the outboard. The filter area and flow
characteristics may not be adequate for high
horsepower outboards.
1. Arrow indicates direction of fuel flow 000124
174176
Typical Fuel Supply Configuration
1. Primer bulb
2. Water separating fuel filter
3. Anti-siphon valve, in fuel pick-up of tank
DRC6797
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