Koshin KTH-S Series User Manual

5
Troubleshooting
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION
Cannot pull or hard to
pull recoil starter
1. Old fuel
2. Rusting inside engine
3. Burn out of engine
4. Blocked impeller
5. Debris at impeller
1. Replace fuel. If there is no improvement, repair
engine
2. Refer to Engine Operation Manual. (Repair)
3. Refer to Engine Operation Manual. (Repair)
4. Dismantle & clean the impeller
5. Dismantle & clean the impeller
Low delivery volume 1. Air leakage from suction side
2. Output power down from engine
3. Damage of mechanical seal
4. Suction lift is high
5. Suction pipe is too long or too small in
diameter
6. Water leaking from delivery hose or pipe
7. Debris at impeller
8. Worn or broken impeller
1. Check hose at suction side
2. Check and repair engine
3. Replace mechanical seal (Repair)
4. Decrease suction lift
5. Shorten suction pipe or enlarge repair to proper
diameter
6. Check and stop leakage of water
7. Dismantle & clean the impeller
8. Replace the impeller (Repair)
Pump does not prime
water
1. Air leaking in from suction side
2. Insufficient priming water Inside pump
casing
3. Drain plug is not tightened
4. Engine speed/rpm is too low
5. Damage of mechanical seal
6. Wrong suction hose used
1. Check hose and connections
at suction side
2. Fill pump with water for priming
Refer to BEFORE USE - "5 Fill pump with water
before use"
3. Tighten drain plug firmly. Please refer to
"ATTENTION AFTER USE"
4. Refer to Engine Operation Manual
5. Replace mechanical seal (Repair)
6. Use correct suction hose
Engine does not start 1. Carburetor is choked/blocked
2. Spark Plug is wet
3. Air cleaner dirty
4. Too much engine oil (4-cycle engine)
5. Insufficient engine oil (4-stroke engine)
6. After checking above points, still engine
does not start
1. Repair
2. Check & repair the plug
3. Clean air cleaner. (Refer to Engine Operation
Manual)
4. Adjust engine oil to suitable level
5. Function of oil alert (oil sensor) is working. (This
function protects engine. If volume of engine oil is
not a suitable level, engine does not start)
6. Possibility of damage, inner parts of engine
(Repair)
Oil leakage from
muffler or air cleaner
1. Tipping of engine 1. Clean engine (Air Cleaner, Carburetor, Muffler,
Spark plug, etc.)
SOLUTION①
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SOLUTION②
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Operating Instructions & Parts Manual
KTH-S SERIES
TRASH PUMP
Heavy Duty

Koshin KTH-S Series Specifications

General

Brand	Koshin
Model	KTH-S Series
Category	Water Pump
Language	English