ADENDORFF TRE-85, Operation Manual

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In case the engine does not start with well supplied fuel, try using
fresh fuel.
f. Is there a strong spark across the electrode?
Warning! Wipe out spilled fuel carefully before testing.
Place spark plug as far away from spark plug hole as possible.
Warning! Do not hold spark plug by hand while pulling recoil starter.
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Remove the spark plug and connect it to the plug cap.
Pull the starter grip while grounding spark plug against engine
body.
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Try with a new spark plug if the spark is weak or there is no spark.
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The ignition system is faulty if there is no spark with a new spark
plug.
Take your engine to your nearest Robin dealer.
2. Start but machine won’t turn
a. Clutch seized
b. Connecting rod or spring broken
c. Bushing seized
d. Bearing broken
3. Start but machine won’t turn ruleless
a. Engine bolt too loosen
b. Spring broken
c. Engine speed ruleless
d. Bushing severity worn
e. Copper bushing broken
4. Oil leaks
a. Leaks positions seal worn
b. Bellow bent or broken
c. Leaks positions parts broken