Kubota WSM B2050 Workshop Manual page 92

B2050, B2350, B2650, B3150, WSM
Symptom
Engine Revolution Is
Not Smooth
Either White or Blue
Exhaust Gas Is
Observed
Probable Cause and Checking Procedure
1. Fuel filter clogged or dirty
2. Air cleaner clogged
3. Fuel leak due to loose injection pipe retaining
nut
4. Injection pump malfunctioning
5. Incorrect nozzle injection pressure
6. Injection nozzle stuck or clogged
7. Governor malfunctioning
1. Excessive engine oil
2. Piston ring and cylinder worn or stuck
3. Incorrect injection timing
4. Deficient compression
Solution order
1. Replace fuel filter
2. Check or change
fuel
Clean or change air
cleaner
Repair retaining nut
Replace injection
pump
Solution order
1. Check injection
pressure
2. Repair or clean
injection nozzle
Solution order
1. Check injection
pressure
2. Repair or clean
injection nozzle
Solution order
1. Check governor
spring or fuel cam
shaft
2. Replace governor
spring or fuel cam
shaft
Reduce to specified
level
Solution order
1. Inspect piston ring
and cylinder
2. Replace piston ring
or cylinder
Solution order
1. Check injection
timing
2. Adjust injection
timing
Solution order
1. Check
compression
pressure
2. Inspect or replace
head gasket
3. Inspect or replace
piston or piston ring
4. Inspect or replace
cylinder
1-S3
ENGINE
Reference
Solution
Page
G-26
G-8
G-24
1-S32
1-S36
1-S21
1-S22
1-S21
1-S22
1-S36
1-S36
G-8
1-S54,
1-S60
1-S40,
1-S60
1-S19
1-S14
1-S33
1-S40,
1-S54
1-S60
KiSC issued 03, 2014 A