CONTENTS
1. INTRODUCTION ·············································································································· 1
1-1 PARTS DESCRIPTION····························································································· 1
1-2 SPECIFICATION ······································································································ 2
1-3 SERVICE LIMIT······································································································· 3
2. DIMENSIONS AND TORQUE·························································································· 6
2-1 ENGINE DIMENSIONS··························································································· 6
2-1-1 R100······················································································································· 6
2-1-2 R80/R160/R180/R200/R210/R225 ·································································· 7
2-1-3 R270/R280/R300····························································································· 8
2-1-4 R390/R420/R440····························································································· 9
2-2 TORQUE VALUES ································································································· 10
2-3 STANDARD Torque valueS ···················································································· 12
3. MAINTENANCE ············································································································· 13
3-1. Maintenance schedule····························································································· 13
3-2 engine oil ················································································································· 14
3-3 Air cleaner ··············································································································· 15
3-4 Cleaning of the fuel filter························································································· 15
3-5 spark plug cleaning and adjusting ············································································ 16
3-6 valve clearance adjustment ······················································································ 16
3-7 governor··················································································································· 17
4. DISASSEMBLING AND SERVICING ··········································································· 18
4-1 Troubleshooting······································································································· 18
4-1-1 Hard starting·································································································· 18
4-1-2 Engine lacks power························································································ 20
4-1-3 Speed is unstable ··························································································· 21
4-1-4 Motor is unable to start·················································································· 21
4-1-5 Exhaust gas color is abnormal ······································································· 22
4-1-6 Unable to ignite ····························································································· 22
4-1-7 Oil alert system malfunction·········································································· 23
