Fuel Lift Pump Removal/Inspection/Installation; Removal - Mercury 200 OptiMax Jet Drive Service Manual

Fuel Pump
Problem: Air bubbles in the fuel line
Fuel vaporizing.
Problem: Lack of fuel pump pressure
An anti‑siphon valve.
Air in fuel line.
A dirty or clogged fuel filter.
The fuel pickup in fuel tank is clogged or dirty.
Fuel hose internal diameter too small.
Excessive fuel lift required.
Problem: No fuel flow
Blown fuse.
Low or no voltage at harness connection.
12 volts present and pump is not running.
12 volts present and pump is running.

Fuel Lift Pump Removal/Inspection/Installation

Removal

1. Disconnect the fuel pump harness connector.
2. Disconnect the fuel hose from the fuel filter.
3. Use sharp side cutter or end cutter to peel back end of the crimp hose clamp securing vapor separator hose. Remove hose
from fuel pump.
Page 3A-8
Fuel with high reed vapor pressure (winter grade fuel) may vaporize (form bubbles)
when used in hot/warm weather. Use fuel with a lower reed vapor pressure
(summer grade fuel).
Refer to Anti-Siphon Valves.
Refer to Air Bubbles in the Fuel Line.
Replace fuel filter.
Clean or replace pickup.
Use 5/16 I.D. fuel hose.
Fuel lift exceeds 2.5 in. of vacuum (mercury).
Check the 3 amp fuse.
Check for loose, corroded, or damaged wires or connections.
Replace the fuel lift pump.
Inspect fuel hose connection, pinched fuel hose, or stuck anti‑siphon valve.
90-8M0050731 MAY 2011