Westerbeke W-27 Service Manual

ENGINE TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
VERIFICATION/REMEDY
KNOCKING ENGINE KNOCKS WITHOUT MUCH SMOKE
1. Faulty injector.
1. Foul exhaust - rebuild injector.
2. Bent rod.
2. Fuelish exhaust check compression, repair.
3. Main engine troubles.
a. Overheated cylinder.
a. See OVERHEATING; LOW OUTPUT.
b. Carbon deposits in cylinder. b. Clean.
4. Too early injection timing.
4. Correct.
5. Too high injection pressure. 5. Correct.
6. Improper fuel.
4. Replace with proper fuel.
KNOCKING WITH DARK SMOKE
1. Poor compression.
1. See LOW COMPRESSION; HARD STARTING.
2. Injection pump malfunctioning.
a. Worn plunger.
a. Replace.
b. Pinion is not in mesh with control rack. b. Correct.
c. Broken delivery valve spring. c. Replace.
d. Worn delivery valve seat.
d. Replace.
3. Improper nozzle.
a. Poor spray. a. Clean or replace nozzle.
b. Poor chattering.
b. Repair or replace nozzle.
c. After-injection drip.
c. Repair or replace nozzle.
d. Nozzle needle valve seized.
d. Replace.
INTERMITTENT 1. Fuel filter clogged.
1. Clean or replace.
EXHAUST SOUND 2. Fuel pipe sucks air.
2. Retighten pipe joints or replace pipe.
3. Water mixed in fuel 3. Replace fuel.
OVERHEATING 1. V-belt slackening or slippery with oil.
1. Adjust, replace or clean.
2. Damaged water pump.
2. Replace.
3. Lack of coolant.
3. Add.
4. Faulty thermostat.
4. Replace.
5. Low oil level or poor oil quality. 5. Add or change.
6. Knocking.
6. See KNOCKING.
7. Moving parts seized or damaged.
7. Replace.
Engines & Generators
15

Westerbeke W-27 Specifications

General

Brand	Westerbeke
Model	W-27
Category	Engine
Language	English