2 Remove | foam |
| Spark | and reset gap at .030" every | 1 00 | |||
a. Wash | in liquid | detergent and warm | hours | of operation. |
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water | to remove | dirt. |
| NOTE: Do not blast clean spark | plug. Spack | plug | ||
b. WrElp | in cloth | and squeeze dry. | should | be cleaned | by scraping or | wire brushing | and |
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| .washing |
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| c. Saturate foam in engine 011. Squeeze to |
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| remove | excess |
| oil. |
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| 0 f cartrl.dge. |
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| Caution: |
| Sparking | can occur | if wire | terminal | does | not | |||||||||||||||||||
3. Remove two nuts from top |
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| fit firmly | on spark | plug. Reform terminal | if necessary. | |||||||||||||||||||||||||||||||
4. | Remove |
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| clean | air | cleaner |
| body | is |
| Arrester | Equipped |
| engine muffler | ||||||||||||||||||||||||
cartridge |
| and |
| equipped | with | spark | arrester | screen | assembly, | ||||||||||||||||||||||||||||||||
| carefully to | prevent | dirt from entering | carburetor. | remove |
| every | 50 | hours for | cleaning | and | inspection. | |||||||||||||||||||||||||||||
| Brush | ,jirt | from | lower |
| air | cleaner | body Into | duct. | Replace | if damaged. |
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5. | Clean | cartridge | by tapping | ~ently | on flat | ~urface | Fuel |
| fuel | filter | every | season. | |||||||||||||||||||||||||||||
| a. If very dirty, replace cartridge or wash In a low |
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| b. | Rinse | thoroughly | from | inside |
| out | until | water is |
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| c. | Cartridge |
| must be allowed to stand and |
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| air |
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| Filter |
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| before | using. |
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6. | Reassemble |
| air | cleaner. |
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| f | ~~~::::~~~ |
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Caution: |
| Petroleum | solvents, | such | as kerosene, |
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not to be used to clean cartridge. They may cause |
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deterioration of the cartridge. Do not oil cartridge. Do |
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not | use pressurized |
| air | to | clean | or | dry cartridge. |
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Clean |
| dirt and debris with a cloth or |
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brush. | Clea,1ing | with | a forceful | spray | of water | is |
| not |
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| Out | Chaff |
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recommended | as | water | could | contaminate | the |
| fuel |
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| and | Dirt |
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system. |
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Clean Cooling |
| chaff or dirt may clog |
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the rotating s,creen and the air cooling | system, | especial- | Remove |
| Combustion | Deposits | every | hours | |||||||||||||||||||||||||||||||||
Iy after | prolonged | service |
| in cutting |
| tall | dry | grasses. | of operation. | Remove | cylinder head | and cylinder | head | ||||||||||||||||||||||||||||
Yearly | or | e'/ery 100 | hours, | whichever | occurs | first, | shield. Scrape | ar,d wire brush the combustion | deposits | ||||||||||||||||||||||||||||||||
remove | the blower | housing | and clean | the areas shown | from cylinder, | cylinder head, | top | of piston | and around | ||||||||||||||||||||||||||||||||
to | avoid | ol/erspeeding, |
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| overheating |
| and |
| engine | valves. |
| Use a soft | brush | to remove | deposits. |
| Re- | ||||||||||||||||||||||||
damage. | Clean | more | often if necessary. |
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| assemble gasket, | cylinder | head | and | cylinder | head | |||||||||||||||||||||||||
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| WARNING: | Periodically | clean | muffler | area to | shield. | Torque | cylinder head screws | in a staggered | se- | ||||||||||||||||||||||||||||||
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| remove all grass, |
| dirt and combustible | debris. | quence |
| to | 140 inch | pounds | (15.82 | Nm). |
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| SECTION | 4 |
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| - |
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| ~ADJUSTMENTS. |
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CARBURETOR |
| ADJUSTMENT |
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| Mixture | r |
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A |
| WARNING: |
| If | any | adjustments |
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| to |
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| i | I / =.. | \ \ \. |
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| the | engine |
| while |
| the | engine |
| is | running |
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| (e.g. carburetor), disengage clutches and |
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| bla,des. Keep clear of all moving parts. Be |
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| careful |
| of | heated | surfaces |
| and muffler. |
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| Idle | Speed | I |
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Minor carburetor adjustment may be required to com- pensate for differences in fuel. temperature, altitude or
load.
NOTE: The air cleaner must be assembled to car- buretor wherl running engine.
To Adjust
Adjusting |
|
| y | ||
Screw | I |
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Throttle | ." |
|
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| Stop |
|
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| |
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| Throttle | Needle | Valve | |
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| \..I.J | (High | Speed) |
until they just close. Valves may be damaged by turn- ing them
21
jo~I:;Idle.?