Efi System Cleaning And Inspection; Cleaning; Inspection - Mercury 150 EFI Service Manual

EFI System Cleaning and Inspection

Cleaning

1. Clean all non-electrical metal parts using a good grade solvent.
2. Use a soft bristle brush for removing large accumulations of dirt or grease and oil.
3. Varnish type coating of induction manifold parts may be removed using carburetor
cleaner.
4. Wiring harnesses can be wiped down with a slightly solvent dampened rag.
5. Clean all fuel passages in induction manifold.
6. Dry all components using clean lint free cloths that are free of abrasives such as metal
shavings or dirt.
7. Compressed air may be used to dry parts if the air used is free of moisture and unlubri-
cated.

Inspection

1. Look at entire system for signs of an obvious problem such as poor condition of wire
insulation, leaking fitting, cracked or loose hoses and lines.
2. Look for fuel or oil leaks wherever these fluids are used (i.e. fuel filter cap, fuel pump,
vapor separator cap, etc.).
3. Check for signs of tampering or abuse such as modifications to wiring or hose routing.
4. Look at main connector between engine harness and ECM box for missing, corroded
or bent contact pins and socket. Check for dislodged grommet in ECM where harness
enters box.
5. Look at all sensors (throttle position, air temperature and water temperature) connec-
tors and harnesses for bad connections or poor insulation conditions such as fraying,
stripping, cracks or signs of abrasion wear.
6. Look for loose, missing or damaged mounting hardware such as stripped threads on
screws.
7. Look at sensors for signs of wear or damage such as cracks, chips, etc.
8. Look at filter housing for cracks, holes or other damage. Check for secure mounting.
9. Look at vapor separator for leaks, cracks, pitting or other damage.
10. Check all rubber mounting grommets for swelling tears, cracks or other conditions that
would render parts unserviceable.
11. Check vapor separator float for signs of fuel entry in the float. Look at needle for wear
of point.
12. Look at injectors for signs of plugging or looseness in fit with induction manifold.
13. Look at throttle linkage for bends, kinking or binding. Check spring for kinks.
14. Inspect all rubber seals and gaskets for swelling, cracks or slices that would cause im-
proper sealing.
90-883728 JULY 2001
FUEL INJECTION
Page 3B-59