TROUBLESHOOTING (ENGINE)
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, please take a remedial action following the diagnosis based on the Engine and Mixer Troubleshooting (Tables 9 and 10) information shown below and on the proceeding pages. If the problem cannot be remedied, please leave the unit just as it is and consult or company's service department.
TABLE 9. ENGINE TROUBLESHOOTING
SYMPTOM | POSSIBLE PROBLEM | SOLUTION | |
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| Inspect carburetor to see if fuel | Check fuel line | |
| is reaching it? | ||
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| No Fuel? | Add Fuel | |
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| Water in fuel tank? | Flush or replace fuel tank. | |
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| Fuel filter clogged? | Replace fuel filter | |
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| Stuck carburetor? | Check float mechanism. | |
Poor starting |
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Spark plug is red? | Spark plug is fouled. Check tranistor ignition unit. | ||
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| Spark plug is | Insufficient compression, injected air leaking. Carburetor jets are | |
| clogged (overflow). | ||
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| No spark present at tip of spark | Tranistor ignition unit broken, high voltage cord cracked or broken. | |
| plug? | Start/Stop switch broken. Replace spark plug if fouled. | |
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| No oil? | Add oil as required. | |
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| Oil pressure alarm lamp blinks | Check Automatic shutdown circuit "oil sensor". | |
| upon starting? | ||
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| Engine will not turn over? | Replace cylinder and piston and if necessary axel joint. | |
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| Cylinder head connecting bolts | Tighten cylinder head connecting bolts. | |
| loose? | ||
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Insufficient power output "no | Cylinder head gasket damaged? | Replace cylinder head gasket. | |
compression" |
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Malfunction of valve seat? | |||
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| Spark plug is loose? | Replace spark plug. | |
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| Worn piston rings? | Replace piston rings. | |
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| Malfunction in | Clean or replace air filter. | |
| system, air filter clogged? | ||
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| Air leaking in from interface | Tighten bolts between carburetor and cylinder head. Replace | |
Insufficient power output | between carburetor and cylinder | cylinder head gasket. | |
"compression" | head? |
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| Clean or replace fuel filter. | |
| Malfunction in fuel system? | Clean or replace carburetor. | |
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| Check carburetor float. | |
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PAGE 32 — MS120 HYDRAULIC MIXER • OPERATION AND PARTS MANUAL — REV. #0 (07/10/08)
