Robalo 220 - No Oil Pressure; High Oil Pressure; Knocking or Pinging; Rough Running

7-4
PROBLEM CAUSE SOLUTION
Low oil pressure (con’t)
No oil pressure
High oil pressure
Knocking or pinging
Rough running
3. Diluted or improper grade and viscosity oil
4. Oil leak in pressure line
1. Defective gauge, gauge tube, or oil line
2. No oil in engine
1. Too heavy grade of oil
2. Dirt or obstruction in oil line
1. Incorrect type fuel
2. Incorrect timing
3. Pre-ignition
4. Overheated engine
5. Cooling system trouble
1. Faulty fuel pump
2. Idle speed too low
3. Faulty ignition system components
4. Clogged fuel filter
5. Contaminated fuel
3. Change oil and oil filter; be sure to use
the correct grade and viscosity oil.
4. Inspect all oil lines and tighten all
connections as necessary.
1. Replace gauge, or tube, and tighten or
replace line as necessary.
2. Fill with proper grade and viscosity oil
(See Engine Owner/Service Manual).
1. Drain oil and replace with proper grade
(See Engine Owner/Service Manual).
2. Drain and clear oil system. Check for
bent or flattened oil lines and replace
as required.
1. Drain tank and replace with proper fuel.
2. Time engine (See Engine Owner/
Service Manual).
3. Clean or replace spark plugs; check
engine timing.
4. Check engine cooling system.
5. Check water intake for blockage.
1. Refer to Engine Owner/Service Manual
for fuel pump testing procedures.
2. Check idle speed and adjust.
3. Service ignition system (See Engine
Owner/Service Manual).
4. Replace fuel filter.
5. Inspect fuel for water or other contami-
nants. If contaminated, drain tank and
flush with fresh fuel.