Cotech YT9071A - Engine System Maintenance; Storage

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ENGLISH
9.2 Air filter
Never use thegrass trimmer without anair filter. Clean or replace thefilter if it is damaged or dirty.
Clean theair filter like this:
1. Undo thescrew in theair filter cover that holds on theouter housing.
2. Remove theouter housing and take out thefilter from theinner cover.
3. Wash thefilter with soap and water. Do not use petrol!
4. Squeeze thefilter and let it dry naturally.
5. Replace thefilter and remount thehousing with theopening facing downwards.
6. Make sure that thehousing is secure so that it won’t shake loose.
9.3 Fuel cap/fuel filter
Remove any sources of ignition, sparks, open flames, lit cigarettes, etc. from thearea where thefuel is mixed,
used or stored. Do not smoke while refuelling or using thegrass trimmer.
1. Open thefuel tank carefully and release any pressure which might have built up in thetank.
Wipe off any spillage and pour any remaining fuel into apetrol can.
2. Pull out thefuel line/fuel filter using something like abent wire.
3. Pull out thefuel filter (twisting it abit helps).
4. Insert anew fuel filter. N.B. Never run theengine without afuel filter.
9.4 Adjusting the carburettor
The carburettor has been factory adjusted for optimum power.
9.5 Spark plug
• Type of spark plug: NGK BM6A or Bosch WS8E
• Electrode gap: 0.65 mm
• Tightening torque: 12–15 Nm
9.6 Sharpening the line cutter knife (on the trimmer guard)
1. Remove thecutter from thetrimmer guard.
2. Hold thecutter in avice. Sharpen theblade using aflat file, sharpening in one direction only and making
sure to maintain theoriginal grinding angle.
10. Storage
1. Clean theexterior of thegrass trimmer, guard, trimmer head, spindle, theexternal parts of theengine, etc.
2. Transfer any fuel remaining in thefuel tank to apetrol container.
3. Start theengine when thefuel tank has been emptied.
4. Allow theengine to idle until it cuts out to empty thecarburettor of fuel.
5. Allow theengine to cool for 5 minutes.
6. Use aspark plug socket to remove thespark plug.
7. Pour one teaspoon of pure 2-stroke oil into thecylinder via thespark plug hole, pull thestarter handle slowly
afew times to distribute theoil evenly over theinside of theengine, replace thespark plug.
8. Store thegrass trimmer in adry and well ventilated place.
10.1 Using the trimmer after it has been stored
1. Use aspark plug socket to remove thespark plug.
2. Pull thestarter handle quickly and smoothly afew times to remove thesurplus oil from thecylinder.
3. Clean theelectrodes of thespark plug or replace it with anew one.
4. Tighten thespark plug using aspark plug socket.
5. Fill thefuel tank.