Volvo Penta V6 Series User Manual

Engine Runs Rough
If At Slow Speed – Check:
•
Ignition system secondary circuit; spark plug wires,
spark plugs.
•
Fuel quality; octane too low, ethanol percentage too
high, water in fuel, old fuel.
•
Fuel filters; water or debris.
If At High Speed – Check:
•
Air leak on suction side of fuel system.
•
Ignition system secondary circuit; spark plug wires,
spark plugs.
•
Fuel quality; octane too low, ethanol percentage too
high, water in fuel, old fuel.
•
Fuel filters; water or debris.
Engine Temperature Too High
Check:
•
Water intakes on drive blocked. Tilt the drive up and
look for obstructions to the water intakes (e.g.,
seaweed, plastic bags, etc.).
•
Check caps on engine flush ports to ensure they are
securely in place. See Engine Flush, page 48.
•
Seawater pump impeller damaged or blocked. For
additional information see Maintenance: Impeller:
Checking & Replacing. Must have tools and parts
on hand.
•
Seawater pump, circulating pump, and belts.
•
Easy Drain, handle should be in closed position.
See Engine Shutdown, page 52.
•
Coolant level in expansion tank. See Freshwater
Cooling System, page 92.
•
Water supply hoses; loose clamps, holes in hoses,
collapsed or restricted hoses.
•
Air leaks on suction side of seawater pump; loose
clamps, cap on flush fitting.
•
Water leaks on pressure side of seawater pump.
•
Heat exchanger; water passages blocked with
grass, sand, mud, or other debris.
•
Check seawater strainer, if equipped.
Troubleshooting
64 47712779 09-2020 © AB VOLVO PENTA

Volvo Penta V6 Series Specifications

General

Brand	Volvo Penta
Model	V6 Series
Category	Engine
Language	English