P 19/ 19
Repair
[4]DISASSEMBLY/ASSEMBLY
[4]-9. Ignition system (cont.)
CHECKING SPARK PLUG
WARNING !!
•When a spark is produced,
•Fuel is extremely flammable and fuel vapors are explosive. Therefore, clean up spilled fuel before starting to check for spark. Also, be careful not to do the check near Carburetor.
(1) Remove Plug cap from Spark plug, then Spark plug from Cylinder head complete with the supplied socket wrench. Note: If the electrodes of Spark plug are wet, wipe them with a rag then dry them with an air blower.
(2) Using a wire brush, carefully clean up carbon deposits (if any) from the electrodes and the ceramic insulator around
| the center electrode. |
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(3) Adjust the electrode gap to 0.5mm by carefully bending the side electrode. Fig. 42 |
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| Use Feeler gauge set (1R366) to check the gap width: |
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| between the center electrode and the side electrode, insert 0.5mm leaf |
| side electrode |
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| of Feeler gauge set. (Fig. 42) |
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(4) Install another Spark plug into spark plug hole to prevent air/fuel mixture |
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| from leaking outside of engine. |
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| Electrode gap | ||||
(5) Connect the removed Spark plug with Plug cap, then ground the threads |
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| must be 0.5mm. | ||||||
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| of Spark plug to a proper metal part of the engine. |
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(6) With Stop switch on, pull Recoil starter knob gently and check for spark. |
| center electrode | ||||||||||||
| Note: It is hard to see the spark in a bright location. |
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| Therefore, be sure to do the check in a shady but |
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(7) If spark is not produced, replace Spark plug with a new one, |
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| then check for spark by following the procedure (1) to (6) once again. |
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[5] Tightening torque specifications |
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| Application |
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| Tightening | ||
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| Fastener |
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| torque (N.m) | ||
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| A |
| B |
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1 |
| Cushion |
| Tank complete | M6x30 Hexalobular socket head bolt |
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| 7 | ||||||
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2 |
| Cutting arm |
| Cylinder block complete | M6x25 Hexalobular socket head bolt |
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3 |
| Cutting arm |
| Belt cover |
| M8 Hex nut |
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| 30 | |
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4 |
| Front inner holder | M6x30 Hexalobular socket head bolt |
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| 3 | ||||||||
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5 |
| Crank case |
| Cylinder block | M6x30 Hexalobular socket head bolt |
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| 12 | ||||||
6 |
| Cylinder head complete |
| Cylinder block | M6x35 Hexalobular socket head bolt |
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| 12 | ||||||
7 |
| Flywheel |
| Crankshaft |
| M10 Flange nut |
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| 40 | |||||
8 |
| Clutch holder |
| Crankshaft | Hexagonal portion | 38 | ||||||||
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9 |
| Clutch assembly |
| Crankshaft |
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| 18 | |||||||
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10 |
| Rocker arm |
| M5 Hex socket head bolt |
| M5x9 Hex nut |
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| 6 |